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Aluminum head dings above cylinder- Repairable?
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CarGuru > Technology > Aluminum head dings above cylinder- Repairable? 19 March 2005 02:14:50

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Aluminum head dings above cylinder- Repairable?

Joe S 10 March 2005 03:05:05
 Some metal debris (I don't yet know source....perhaps a valve guide
disintegrated? Will know more tonight.) has resulted in a couple
hundred dings on the head for that cylinder. Some I would even call
gashes.

Before I bother to take it to a machine shop, I thought I'd ask if I
should bother to take it to a machine shop. (-;

I'm thinking that either it can be left alone and will run okay, or
have the dings smoothed out a bit, or maybe it's possible to fill
gashes in some way (forgive my ignorance as to whether a shop can
typically weld aluminum to fill) or whether I just have to find a
replacement head? Obviously, if this head is repairable, it'll get
valve job too.

This is on a 94 Merc Tracer aka Ford Escort. I don't want to spend alot
of dough...it's just a utility vehicle with alot of miles and I'd like
to get another 20k miles (or more) out of it for cheap.

TIA,

Joe

Add comment
Comboverfish 10 March 2005 03:41:20 permanent link ]
 
Joe S wrote:> Some metal debris (I don't yet know source....perhaps a valve guide> disintegrated? Will know more tonight.) has resulted in a couple> hundred dings on the head for that cylinder. Some I would even call> gashes.>
Before I bother to take it to a machine shop, I thought I'd ask if I> should bother to take it to a machine shop. (-;>
I'm thinking that either it can be left alone and will run okay, or> have the dings smoothed out a bit, or maybe it's possible to fill> gashes in some way (forgive my ignorance as to whether a shop can> typically weld aluminum to fill) or whether I just have to find a> replacement head? Obviously, if this head is repairable, it'll get> valve job too.>
This is on a 94 Merc Tracer aka Ford Escort. I don't want to spend
alot> of dough...it's just a utility vehicle with alot of miles and I'd
like> to get another 20k miles (or more) out of it for cheap.>
TIA,>
Joe


The debris may be a cracked spark plug insulator that flew around in
the cylinder and broke into many smaller pieces. They can crack when a
small coolant leak hits the hot spark plug.

The resulting dings in your combustion chamber create many sharp edges
that could get excessively hot and cause preignition. Perhaps the shop
could bead blast the chamber surface before doing necessary valve seat
and guide work. That would be an acceptable repair for fairly low
cost.

Toyota MDT in MO

Add comment
Joe S 10 March 2005 09:25:04 permanent link ]
 Comboverfish wrote:> Joe S wrote:>
Some metal debris (I don't yet know source....perhaps a valve guide>>disintegrate­d? Will know more tonight.) has resulted in a couple>>hundred dings on the head for that cylinder. Some I would even call>>gashes.>>
Before I bother to take it to a machine shop, I thought I'd ask if I>>should bother to take it to a machine shop. (-;>>
I'm thinking that either it can be left alone and will run okay, or>>have the dings smoothed out a bit, or maybe it's possible to fill>>gashes in some way (forgive my ignorance as to whether a shop can>>typically weld aluminum to fill) or whether I just have to find a>>replacement head? Obviously, if this head is repairable, it'll get>>valve job too.>>
This is on a 94 Merc Tracer aka Ford Escort. I don't want to spend>
alot>
of dough...it's just a utility vehicle with alot of miles and I'd>
like>
to get another 20k miles (or more) out of it for cheap.>>
TIA,>>
The debris may be a cracked spark plug insulator that flew around in> the cylinder and broke into many smaller pieces. They can crack when a> small coolant leak hits the hot spark plug.>
The resulting dings in your combustion chamber create many sharp edges> that could get excessively hot and cause preignition. Perhaps the shop> could bead blast the chamber surface before doing necessary valve seat> and guide work. That would be an acceptable repair for fairly low> cost.>
Toyota MDT in MO>

The source of the debris has been identified. As soon as I pulled the
valve, it was clear that the valve seat insert had broken apart. See
picture.

http://www.gone2mau­i.com/Pictures/HeadD­amage_1.jpg

What do you think of the messed-up head? Are we talking salvage yard here?

--
Joe
Add comment
Brian 10 March 2005 17:06:11 permanent link ]
 If you didn't have access to another head you could polish off the high
bits, blend it it and have slightly lower compression in that cylinder.
I've done that on heads that were somewhat irreplaceable and had no issues
at all with the "repair". But the cost of putting in a new valve seat and a
valve job is probably a lot higher than the cost of putting on a used head.

Brian


"Joe S" <mej0j0@verizon.net­> wrote in message
news:QSQXd.33161$uc­.10822@trnddc09...> Comboverfish wrote:>> Joe S wrote:>>
Some metal debris (I don't yet know source....perhaps a valve guide>>>disintegrat­ed? Will know more tonight.) has resulted in a couple>>>hundred dings on the head for that cylinder. Some I would even call>>>gashes.>>>
Before I bother to take it to a machine shop, I thought I'd ask if I>>>should bother to take it to a machine shop. (-;>>>
I'm thinking that either it can be left alone and will run okay, or>>>have the dings smoothed out a bit, or maybe it's possible to fill>>>gashes in some way (forgive my ignorance as to whether a shop can>>>typically weld aluminum to fill) or whether I just have to find a>>>replacement head? Obviously, if this head is repairable, it'll get>>>valve job too.>>>
This is on a 94 Merc Tracer aka Ford Escort. I don't want to spend>>
alot>>
of dough...it's just a utility vehicle with alot of miles and I'd>>
like>>
to get another 20k miles (or more) out of it for cheap.>>>
TIA,>>>
The debris may be a cracked spark plug insulator that flew around in>> the cylinder and broke into many smaller pieces. They can crack when a>> small coolant leak hits the hot spark plug.>>
The resulting dings in your combustion chamber create many sharp edges>> that could get excessively hot and cause preignition. Perhaps the shop>> could bead blast the chamber surface before doing necessary valve seat>> and guide work. That would be an acceptable repair for fairly low>> cost.>>
Toyota MDT in MO>>
The source of the debris has been identified. As soon as I pulled the > valve, it was clear that the valve seat insert had broken apart. See > picture.>
What do you think of the messed-up head? Are we talking salvage yard here?>
-- > Joe


Add comment
Hls 10 March 2005 17:36:31 permanent link ]
 
What do you think of the messed-up head? Are we talking salvage yard here?>
--> Joe
I would not use any JB Weld, plastic aluminum, etc...That would not hold up
under the conditions inside the chamber.

As long as the head isn't cracked, I believe you can smoothe it out and live
with
it, since you don't want to spend much money on it. It is really hard to
tell, from the photo, how extensive the damage is....it may be largely
cosmetic.




Add comment
Steve 10 March 2005 19:26:24 permanent link ]
 After seeing the photo, I'd head straight to a salvage yard and look for
a head. You're going to have the expense of a new valve seat insert
already, and the gouging is clearly enough to affect compression on that
cylinder.

Add comment
Comboverfish 10 March 2005 21:06:43 permanent link ]
 
Joe S wrote:
What do you think of the messed-up head? Are we talking salvage yard
here?>
--> Joe

Oh yeah! It's time for a salvage or reman head. If you have a good
machine shop you might take your "new" salvage head to them and request
the absolute minimum work done. You might get by with a resurface and
new valve seals (you could do those yourself). Of course the shop we
sublet to conveniently finds something wrong with valves and seats on
every head we send them, and we have to tell them exactly what we want
done to keep the cost down.

I wonder if seats dropping are common on this year/engine. I assume
you have the 1.9 Ford engine vs the 1.8 Mazda. I haven't seen 1.9s do
this but nothing would surprise me with that boat anchor.

Toyota MDT in MO

Add comment
Backbone 10 March 2005 21:58:28 permanent link ]
 "Joe S" <mej0j0@gmail.com> wrote in message
news:1110409505.067­212.32300@f14g2000cw­b.googlegroups.com..­.> Some metal debris (I don't yet know source....perhaps a valve guide> disintegrated? Will know more tonight.) has resulted in a couple> hundred dings on the head for that cylinder. Some I would even call> gashes.>
Before I bother to take it to a machine shop, I thought I'd ask if I> should bother to take it to a machine shop. (-;

I'd take it to the machine shop. Perhaps they can weld it. At the least they'll
let you know what is feasible or not


Add comment
Comboverfish 10 March 2005 22:03:18 permanent link ]
 Joe S wrote:
What do you think of the messed-up head? Are we talking salvage yard
here?>
--> Joe


Oh yeah! It's time for a salvage or reman head. If you have a good
machine shop you might take your "new" salvage head to them and request
the absolute minimum work done. You might get by with a resurface and
new valve seals (you could do those yourself). Of course the shop we
sublet to conveniently finds something wrong with valves and seats on
every head we send them, and we have to tell them exactly what we want
done to keep the cost down.

I wonder if seats dropping are common on this year/engine. I assume
you have the 1.9 Ford engine vs the 1.8 Mazda. I haven't seen 1.9s do
this but nothing would surprise me with that boat anchor.

Toyota MDT in MO

Add comment
Joe S 11 March 2005 02:35:19 permanent link ]
 
Joe S wrote:> Some metal debris (I don't yet know source....perhaps a valve guide> disintegrated? Will know more tonight.) has resulted in a couple> hundred dings on the head for that cylinder. Some I would even call> gashes.>
Before I bother to take it to a machine shop, I thought I'd ask if I> should bother to take it to a machine shop. (-;>
I'm thinking that either it can be left alone and will run okay, or> have the dings smoothed out a bit, or maybe it's possible to fill> gashes in some way (forgive my ignorance as to whether a shop can> typically weld aluminum to fill) or whether I just have to find a> replacement head? Obviously, if this head is repairable, it'll get> valve job too.>
This is on a 94 Merc Tracer aka Ford Escort. I don't want to spend
alot> of dough...it's just a utility vehicle with alot of miles and I'd
like> to get another 20k miles (or more) out of it for cheap.>
TIA,>
Joe



Head guy says that the seat let go likely due to a crack in the head.
He says I can get a refurbished head all pressure-tested and ready to
bolt on for $425. I'm guessing I can get set up with gaskets and bolts
for about my $500 limit.

So, I'm thinking that if he can get it for tomorrow, then that's the
way I'll go so I can have it running this weekend.


Joe

Add comment
JazzMan 11 March 2005 06:51:34 permanent link ]
 Joe S wrote:>

The source of the debris has been identified. As soon as I pulled the> valve, it was clear that the valve seat insert had broken apart. See> picture.>
What do you think of the messed-up head? Are we talking salvage yard here?>

That head's a gonner. The chances that there aren't any
cracks is about nil, and if yoo ground away all the damage
you'd have such a compression mismatch that the engine
would never run right again.

I'd hit the junkard for a used replacement.

JazzMan
--
*******************­********************­*******************
Please reply to jsavage"at"airmail.­net.
Curse those darned bulk e-mailers!
*******************­********************­*******************
"Rats and roaches live by competition under the laws of
supply and demand. It is the privilege of human beings to
live under the laws of justice and mercy." - Wendell Berry
*******************­********************­*******************
Add comment
JazzMan 11 March 2005 06:53:09 permanent link ]
 Joe S wrote:>
Joe S wrote:> > Some metal debris (I don't yet know source....perhaps a valve guide> > disintegrated? Will know more tonight.) has resulted in a couple> > hundred dings on the head for that cylinder. Some I would even call> > gashes.> >
Before I bother to take it to a machine shop, I thought I'd ask if I> > should bother to take it to a machine shop. (-;> >
I'm thinking that either it can be left alone and will run okay, or> > have the dings smoothed out a bit, or maybe it's possible to fill> > gashes in some way (forgive my ignorance as to whether a shop can> > typically weld aluminum to fill) or whether I just have to find a> > replacement head? Obviously, if this head is repairable, it'll get> > valve job too.> >
This is on a 94 Merc Tracer aka Ford Escort. I don't want to spend> alot> > of dough...it's just a utility vehicle with alot of miles and I'd> like> > to get another 20k miles (or more) out of it for cheap.> >
TIA,> >
Head guy says that the seat let go likely due to a crack in the head.> He says I can get a refurbished head all pressure-tested and ready to> bolt on for $425. I'm guessing I can get set up with gaskets and bolts> for about my $500 limit.>
So, I'm thinking that if he can get it for tomorrow, then that's the> way I'll go so I can have it running this weekend.>
Joe


What does the top of the piston look like? There's also the chance
that the rod bearing on that cylinder is damaged. Are you in the
position to check that?

JazzMan
--
*******************­********************­*******************
Please reply to jsavage"at"airmail.­net.
Curse those darned bulk e-mailers!
*******************­********************­*******************
"Rats and roaches live by competition under the laws of
supply and demand. It is the privilege of human beings to
live under the laws of justice and mercy." - Wendell Berry
*******************­********************­*******************
Add comment
Joe S 11 March 2005 08:16:10 permanent link ]
 JazzMan wrote: >
What does the top of the piston look like? There's also the chance> that the rod bearing on that cylinder is damaged. Are you in the> position to check that?>
JazzMan


The worst thing on the piston is one ding that had a piece of the valve
seat about the size of bee-bee or two. I got that out. The machine shop
guy says that at this low compression, it shouldn't present any sort of
problem to have a little bit of piston imperfection. He recommended I
just leave it alone so long as I got the seat metal out of there.

I do not plan on opening up the crankcase, so I'm gonna hope.

--
Joe
Add comment
Hls 11 March 2005 17:30:39 permanent link ]
 
"Joe S" <mej0j0@gmail.com> wrote in message
news:1110494119.795­164.77760@l41g2000cw­c.googlegroups.com..­.> Head guy says that the seat let go likely due to a crack in the head.> He says I can get a refurbished head all pressure-tested and ready to> bolt on for $425. I'm guessing I can get set up with gaskets and bolts> for about my $500 limit.>
So, I'm thinking that if he can get it for tomorrow, then that's the> way I'll go so I can have it running this weekend.> Joe

Respectfully, I believe I could find a fair junkyard engine, complete, for
less than that.

I don't know where you are, of course, but it seems higher than I would feel
comfortable in paying.


Add comment
Joe S 11 March 2005 20:52:25 permanent link ]
 
HLS wrote:> "Joe S" <mej0j0@gmail.com> wrote in message> news:1110494119.795­164.77760@l41g2000cw­c.googlegroups.com..­.> > Head guy says that the seat let go likely due to a crack in the
head.> > He says I can get a refurbished head all pressure-tested and ready
bolt on for $425. I'm guessing I can get set up with gaskets and
bolts> > for about my $500 limit.> >
So, I'm thinking that if he can get it for tomorrow, then that's
way I'll go so I can have it running this weekend.> > Joe>
Respectfully, I believe I could find a fair junkyard engine,
complete, for> less than that.>
I don't know where you are, of course, but it seems higher than I
would feel> comfortable in paying.


I do appreciate the input, and I suspected that this would be true, but
I was willing to pay some extra money for the small amount of security
that this reman. head is whole and guaranteed (and has a fresh valve
job, too) and is available to me today for installation this weekend.

As this car is used by my son who does not live at home, I feel better
with this solution rather than putting in some unknown parts.

I also have a load of travertine, marble and slate sitting in my garage
waiting for me to start the bathroom remodel, so time is also very
significant to me.

Thanks for everyone's input! I'll report the final outcome.


Joe

Add comment
Joe S 12 March 2005 03:23:46 permanent link ]
 Joe S wrote:> Head guy says that the seat let go likely due to a crack in the head.

More on this....research has indicated that this is an epidemic problem
with this head. Almost always #4 cylinder, usually intake, but
occasionally exhaust.

Details and horror stories found here:
http://www.cartrack­ers.com/Forums/live/­Ford/229.html

The stories make me want to dump the car as soon as I get it back
together.

)-:


Joe

Add comment
Joe S 18 March 2005 18:49:03 permanent link ]
 Update on this....

Shop with $425 reman head did come through in time for last
weekend...supplier sent from far away instead of nearby...so I got a
reman head on ebay for under $200.

Only one problem...the cam angle sensor port (I think that's what it's
called) is not drilled out. Upper left of this picture.

http://www.gone2mau­i.com/Pictures/head.­JPG

On the original head, there's a magnetic sensor that goes into the hole
and senses when a bump on the cam passes by.

My question is...does this just need to be drilled out to allow the
sensor to be mounted? I assume the cam has the bump even though this
"optional port" hasn't been opened up.

Anyone know for sure?


Joe

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CarGuru > Technology > Aluminum head dings above cylinder- Repairable? 19 March 2005 02:14:50

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