Valve clearance, timing chain etc. P6 2000TC

[Wilfred Oldtimer]

Hi, so each pair of bearing cap bolts also tighten the head then ?

That’s a good idea indeed, do you think that the current clearance is still acceptable for this engine?

 

[colnerov]

Hi, so each pair of bearing cap bolts also tighten the head then ?

That’s a good idea indeed, do you think that the current clearance is still acceptable for this engine?

Not necessarily , it can escalate to a head gasket change unless you take precautions.

 

[harveyp6]

What's the clearance?

 

[harveyp6]

It's not a bad idea to drain the coolant when you adjust the clearance.

 

[Wilfred Oldtimer]

What's the clearance?

I made a small note:

 

[Wilfred Oldtimer]

It's not a bad idea to drain the coolant when you adjust the clearance.

Hi, I just did when I changed all coolant hoses

 

[harveyp6]

I made a small note:
View attachment 24191

If those clearances are Metric, I can't do anything for you.

 

[Per-Anders]

Hi
Correct valve clearance:
Inlet 0,20 mm (0,008")
Exhaust 0,30 mm (0,013")
So cylinder 3 are to thigh and need adjustment.

 

[Wilfred Oldtimer]

Hi
Correct valve clearance:
Inlet 0,20 mm (0,008")
Exhaust 0,30 mm (0,013")
So cylinder 3 are to thigh and need adjustment.

That’s clear then, I could get 0.15 easily in though. So it’s probably close to 0.20

 

[Wilfred Oldtimer]

My TC responded extremely well to a CDI ignition system - .040" plug gaps, much improved consumption. Read the manual carefully on changing valve shims - the cam carrier is fitted using the head bolts. Chain stretch can be adjusted via the vernier in the cam chain wheel. Keep coming back here for advice if you get lost along the way.

I’m just reading this and realised that I kept my spark plug gaps at 0.6 mm, which is about 0.024”
You wrote it can be changed to 0.04”, which is about 1mm. Is that correct?
My P6 has also got electronic ignition, hence my question.

Cheers,

Wilfred

 

[j_radcliffe]

Good evening,

This evening I lifted the cam cover to check the valve clearance. It doesn’t look too bad I think, only cylinder 3 needs some adjustment, or is this still acceptable on this engine?
The tension on the upper chain is also good.

I’m familiar with replacing shims on my other oldtimer car which has a Jaguar XK engine, it’s the same principle, but in this P6 engine the same bolts are also used to tighten the cylinder head ??

Anyway, the cam cover has a new fresh gasket now and the engine seems to be running nicer, but this can also be my imagination of course.

Thanks,

Wilfred

View attachment 24182View attachment 24183

Are those clearance numbers in mm? Times them by 40 so we can see thou. These motors were specified in thou, and those who have the shims sort them according to thou. Number 3 looks too tight. I would take care of it, you do not want to end up with burnt valves.