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CarGuru > Open discussion > Gasket Sealer 17 May 2006 09:11:34

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Gasket Sealer

Doogs 30 April 2005 03:33:31
 Just a quick question.
Am atempting my first head gasket change tomorrow and was wondering if i
need to apply any sealer?
Is there anything else i should think about doing at the same time?
Any tips welcome.
Doogs
1981 miniHL
Add comment
John Manders 30 April 2005 00:38:16 permanent link ]
 If it's a copper head gasket, I use a thin smear of grease. If it's the
fibre type, nothing.
When you refit the exhaust gasket, slot the stud holes downwards. That way
if you ever have to change it. just loosen the nuts and it will lift out.
I don't normally change the thermostat. they're easy to do later anyway so
there's little saving.
A new bypass hose is always a good idea.
I would look at the bottom hose as well while you're in the area.
A new fan belt might be a good idea if it's showing any wear.
Finally, check the head is flat. If in doubt, a skim cost very little. If
you do that, put a slight chamfer on the combustion chambers to remove any
potential hot spots.

John

"Doogs" <crap@noshitfiler.m­e.uk> wrote in message
news:fvzce.16563$vU­4.3411@newsfe6-win.n­tli.net...> Just a quick question.> Am atempting my first head gasket change tomorrow and was wondering if i> need to apply any sealer?> Is there anything else i should think about doing at the same time?> Any tips welcome.> Doogs> 1981 miniHL


Add comment
The Muffin Man 30 April 2005 03:48:52 permanent link ]
 No no no no no!! :)­ Head gaskets go on with nowt!! (no really, nothing)

Stick goo on anything else but a head gasket!! (you shouldn't need to
though)

Your second Q? Stick a new gasket on everything else (may as well rather
than drive 100 miles an find your exhaust is blowing - after all you get a
full head set for a tenner). Replace your thermostat. Clean everything up
before hand and paint the head. (May as well as it is off anyway).

Good luck with your first head change. It is where we all started...

The Muffin Man

"Doogs" <crap@noshitfiler.m­e.uk> wrote in message
news:fvzce.16563$vU­4.3411@newsfe6-win.n­tli.net...> Just a quick question.> Am atempting my first head gasket change tomorrow and was wondering if i > need to apply any sealer?> Is there anything else i should think about doing at the same time?> Any tips welcome.> Doogs> 1981 miniHL


Add comment
Rob 30 April 2005 10:34:20 permanent link ]
 The Muffin Man wrote:
No no no no no!! :)­ Head gaskets go on with nowt!! (no really, nothing)>
Stick goo on anything else but a head gasket!! (you shouldn't need to > though)>
I always use Hylomar (spray) on head gaskets.


r
Your second Q? Stick a new gasket on everything else (may as well rather > than drive 100 miles an find your exhaust is blowing - after all you get a > full head set for a tenner). Replace your thermostat. Clean everything up > before hand and paint the head. (May as well as it is off anyway).>
Good luck with your first head change. It is where we all started...>
The Muffin Man>
"Doogs" <crap@noshitfiler.m­e.uk> wrote in message > news:fvzce.16563$vU­4.3411@newsfe6-win.n­tli.net...>
Just a quick question.>>Am atempting my first head gasket change tomorrow and was wondering if i >>need to apply any sealer?>>Is there anything else i should think about doing at the same time?>>Any tips welcome.>>Doogs>>19­81 miniHL >
Add comment
Jim 30 April 2005 15:50:35 permanent link ]
 Doogs wrote:> Just a quick question.> Am atempting my first head gasket change tomorrow and was wondering if i > need to apply any sealer?> Is there anything else i should think about doing at the same time?> Any tips welcome.> Doogs> 1981 miniHL
As per Muffin Man, don't use anything on the head gasket.
Have fun with the bypass hose ! (you might aswell change that at the
same time too)

Jim
Add comment
Minifreek 30 April 2005 18:30:23 permanent link ]
 dont forget to re-gap the tappets too.

and change the oil....

BTW where do you get spray on head gaskets from? and do they work?

"Jim" <me@here.com> wrote in message
news:fiKce.20675$u5­.8343@newsfe2-gui.nt­li.net...> Doogs wrote:>> Just a quick question.>> Am atempting my first head gasket change tomorrow and was wondering if i >> need to apply any sealer?>> Is there anything else i should think about doing at the same time?>> Any tips welcome.>> Doogs>> 1981 miniHL> As per Muffin Man, don't use anything on the head gasket.> Have fun with the bypass hose ! (you might aswell change that at the same > time too)>
Jim


Add comment
The Muffin Man 1 May 2005 03:03:26 permanent link ]
 "John Manders" <johnmanders@freene­tname.co.uk> wrote in message
news:Gp-dnf7iS7esQu­7fRVnyvw@brightview.­com...> If it's a copper head gasket, I use a thin smear of grease. If it's the> fibre type, nothing.

Do people still buy these ridiculous gaskets? On grand designs this week
the guy insulated his Scandinavian log cabin with shredded newspaper. That
looked more effective.

I would only ever fit a copper gasket.

The Muffin Man


Add comment
John Manders 1 May 2005 12:34:42 permanent link ]
 Well done.
The only scary moment was when putting the pushrods back in one was> stuck right up and we had to remove the cover on the back and slot a> round metal thingy back in.

That's a cam follower. When removing a pushrod, always rotate it and feel
the weight of the cam follower drop before you finally lift the rod out. I
also keep them in the same order when assembling.

John


Add comment
M.M. 16 May 2006 06:48:08 permanent link ]
 I'm replacing the water pump on my Mazda Protege while I have it apart
to replace the timing belt. The manual recommends using sealer on the
water pump gaskets. What would be the best kind to use? I was thinking
of that blue silicone stuff since I have some on hand but I need to
swing by my FLAPS tomorrow anyway so I can pick up something else if
it'd be better. Recommendations?

This job is turning out to be a bigger PITA than I anticipated. The fact
that it's over 100F outside doesn't help any...

Thanks...
Add comment
* 16 May 2006 17:19:11 permanent link ]
 


CGBear <Gavers1@netzero.ne­t> wrote in article
<1147754140.081262.­112790@i39g2000cwa.g­ooglegroups.com>...>­ I've always used the blue or clear silicone sealer with no problems. I> put the sealer pump and then install gasket to the pump and let it set> for a while. Then install the pump on the motor. Some people put the> sealer on both sides, but I usually don't. Hope this helps.>

Silicone is a gasket *maker* - not a sealer.

There are things such as Aviation cement, Permatex "Super 300", and
sebveral other gasket "sealers" that work well.

The problem with using silicone is that it can - and often does - allow the
gasket to slide out from its position - creating a leak.

Silicone is designed to be used WITHOUT a gasket not WITH one.

For those of you who are going to write back and talk about using a small
dab of silicone at gasket joints, forget about it.

I'm talking about recommendations, such as the above, that suggest
slathering the gasket with silicone.

Permatex used to state right on the tube taht the silicone was NOT to be
used with gaskets.


Add comment
Mike Romain 16 May 2006 18:17:17 permanent link ]
 You have to be very careful with 'silicone' around modern vehicle. One
whiff of the fumes will kill an O2 sensor. The now make 'sensor safe'
RTV silicone.

That said, usually waterpumps call for either RTV or a gasket
(with/without sealer)

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagesta­tion.com/album/pictu­res.html?id=21151475­90
(More Off Road album links at bottom of the view page)

"M.M." wrote:>
I'm replacing the water pump on my Mazda Protege while I have it apart> to replace the timing belt. The manual recommends using sealer on the> water pump gaskets. What would be the best kind to use? I was thinking> of that blue silicone stuff since I have some on hand but I need to> swing by my FLAPS tomorrow anyway so I can pick up something else if> it'd be better. Recommendations?>
This job is turning out to be a bigger PITA than I anticipated. The fact> that it's over 100F outside doesn't help any...>
Thanks...
Add comment
 

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CarGuru > Open discussion > Gasket Sealer 17 May 2006 09:11:34

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