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How to check valve clearances and adjust it, on at HDI engine?
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CarGuru > Peugeot > How to check valve clearances and adjust it, on at HDI engine? 9 May 2005 22:47:38
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How to check valve clearances and adjust it, on at HDI engine?

Tih Hansen via CarKB.com 9 May 2005 22:47:38
 Hi,

My 406 HDI has covered 200.000 KM.

The car has some starting problems, how do I check the valve clearances and
can it be adjustet?, and how?

TIH

--
Message posted via http://www.carkb.co­m
Add comment
Davek 6 May 2005 14:09:37 [ permanent link ]
 
"Tih Hansen via CarKB.com" <forum@nospam.CarKB­.com> wrote in message
news:5730cd8ff8dd49­86b27369b868b6af4d@C­arKB.com...> Hi,>
My 406 HDI has covered 200.000 KM.>
The car has some starting problems, how do I check the valve clearances > and> can it be adjustet?, and how?>
Very complicated I would think. The old XUD required removal of the
camshaft, then removal, measuring and replacing of shims.
There are grave warnings about interfering with hdi's. There's a lot of
pressure in the fuel system.(Like 50,000psi).
DaveK.



Add comment
Tih Hansen via CarKB.com 6 May 2005 20:35:52 [ permanent link ]
 Hi,

Thanks,

Is there no easy way to do the adjustment, with help from some special
tools?.

It sounds a bit expensive to remove the camshaft ect. to do the adjustment.

TIH

--
Message posted via http://www.carkb.co­m
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Nigel 7 May 2005 01:51:00 [ permanent link ]
 On Fri, 06 May 2005 16:35:52 GMT, "Tih Hansen via CarKB.com"
<forum@CarKB.com> wrote:
Hi,>
Thanks,>
Is there no easy way to do the adjustment, with help from some special>tools?.>
It sounds a bit expensive to remove the camshaft ect. to do the adjustment.>
TIH
Once again, they're hydraulic tappets and cannot be adjusted. If
noisy, renew. They don't seem to give too much trouble though.
Add comment
Tih Hansen via CarKB.com 8 May 2005 00:24:32 [ permanent link ]
 Hi,

I was told that the valve clearance could, and should be adjusted it my car
has starting difficulties.

So you are telling me that this is not possible?

Stange!

TIH

--
Message posted via http://www.carkb.co­m
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Nigel 8 May 2005 05:40:28 [ permanent link ]
 On Sat, 07 May 2005 20:24:32 GMT, "Tih Hansen via CarKB.com"
<forum@CarKB.com> wrote:
Hi,>
I was told that the valve clearance could, and should be adjusted it my car>has starting difficulties.>
So you are telling me that this is not possible?>
Stange!>
TIH
You were misinformed
This engine has hydraulic tappets and are self adjusting. I believe it
is only the TU engines single cams that are able to be adjusted in the
current range of cars.
Add comment
Ray Bentos 8 May 2005 18:27:35 [ permanent link ]
 The HDI engines have hydraulic selt adjusting tappets.

The single cam TU engines have rocker arms, where the valve clearance can be
easily adjusted by a screw on the end.

Only option is to replace the tappets, although I would get a second opinion
on this as they dont usually give too much trouble and are a big job to
replace.

Is the engine noisy? Can you hear the tappets?



Add comment
Tih Hansen via CarKB.com 9 May 2005 00:59:41 [ permanent link ]
 Hi,

No there is no abnormal noise, but I have the following problem with the
car. I was told that the valve clearances could be the cause of the problem.

My 406 HDI has some starting problems.

About 2 weeks ago it refused to start (but turned the starter motor ok), I
changed the glow plugs, diesel filer, cleaned all electrical connectors in
the engine bay, check all fuses, replaced the pressure regulator on the
back of the pump, cleaned the valve on top of the pump, checked the return
valve on the supply to the high pressure pump, checked the fuel supply from
the lift pump and cleaned the connector on top of it, checked the fuel flow
from the high pressure pump to the rail.

I still have the same problem!!!!!!!!!!!!­.

Normally when I want to start the car with a cold engine, I just turn the
key and the car starts after 2-3 seconds, but now the car needs a lot
longer time before it fires, about 5-6 seconds with the starter running,
sometimes the car will not start at all.

But the weird thing is, when the engine then starts it runs normally,
responds to the accelerator normally.

I thought about replacing the pressure sensor on the rail, or the valve on
top of the pump.

I checked again, and the fuel lift pump delivers a very constant flow of
fuel to the high pressure pump. I check the ground connections to the ECU
and the engine, and found no problems. I verified the adjusted the camshaft
sensor, and found nothing wrong.

I checked the flow of fuel from the high pressure pump to the Rail it self,
by unmounting the pipe from the rail. The flow of fuel from high pressure
pump was constant, but significant slower then the flow from the lift pumps.

Is that correct? Or do I have an indicator that something is wrong with my
pressure pump?

How does the pressure sensor on the rail and the pressure regulator on the
high pressure pump work together? Has anybody had problems with these to
sensors?

I need some advice, to continue my troubleshooting.

TIH

--
Message posted via http://www.carkb.co­m
Add comment
MARK BANKS via CarKB.com 9 May 2005 22:47:38 [ permanent link ]
 Hi mate, first of all this vehicle is a high pressure direct injection
engine(not in-direct) so glow plugs only HELP warm the cylinder a little
(at 0 degree's c supplied for 0.5 sec) not much! ,and have no bearing for a
none/hard to start vehicle. usual things for a none starter are pressure
probs i.e low pressure pump in tank which should supply 2.5 and give 0.7
return pressure in bar. once you have disconnected the pipes you are
supposed to replace 'em as they leave a "foot print" and under the high
pressures this engine uses (298 idle upto max 1350 bar) so be
carefull.other things are fuel pressure sensor (x3 way red on rail
disconnect to give a default value ) injectors leak off , and last of all
if everything on h/p side is ok the high pressure pump (min 120 bar to
start ) personally though b4 you condemn that whack on a p-codes reader
just to make should you have no other electrical faults present..
n e way all the best in your dignoses. mark (peugeot master technician)
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CarGuru > Peugeot > How to check valve clearances and adjust it, on at HDI engine? 9 May 2005 22:47:38
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