GARV is making awful clicking noises

[HooferUK]

Garv my S2 is making awful clicking noises which sarted on my 20 mile trip yesterday. I really don't know where to start HELP !!

https://www.youtube.com/shorts/YQGdUjljMR4

[GreenV8S]

That sounds like an exhaust blow. They can sound very mechanical when close to the head. If you get it stone cold and very carefully run your hands around the header before it gets too hot, taking care to avoid moving parts, you may be able to feel where it's coming from.

[HooferUK]

yes!! manifold gasket on number one!

Edited by HooferUK on Thursday 22 September 06:23

[Fefeu52]

Manifold gasket or/and manifold cracked. The task is the same : remove the manifold, clean it, check it, and if OK, put it again with new gaskets.

[greymrj]

HooferUK said:

yes!! manifold gasket on number one!

Edited by HooferUK on Thursday 22 September 06:23

Have you got it off now? Is the manifold OK? need to check it is still flat across the faces before refitting. There can be a problem with corrosion damage to the studs (especially after a blow) and the nuts not holding tight anymore. Changed mine to high grade stainless bolts.

[phillpot]

greymrj said:

There can be a problem with corrosion damage to the studs (especially after a blow) and the nuts not holding tight anymore

While Ford used studs and nuts TVR decided to use bolts on the 2.9 engine, you're in for some fun if you snap one of those off

[greymrj]

phillpot said:

While Ford used studs and nuts TVR decided to use bolts on the 2.9 engine, you're in for some fun if you snap one of those off

Ah, you learn something every day. The earlier cars have studs. Have had to drill out broken manifold studs, fortunately my drill stand is big enough to take a block never mind a head so I can drill straight, would be a bugger by hand!

[HooferUK]

Ok fixed one problem and have another, still a slight ticking so strip down to check the push rods tomorrow as the ticking sounds like a bent one

[phillpot]

Before you start looking for bent pushrods (not a known issue with these engines) have you checked the valve clearances?

Edited by phillpot on Monday 3rd October 21:40

[GreenV8S]

HooferUK said:

Ok fixed one problem and have another, still a slight ticking so strip down to check the push rods tomorrow as the ticking sounds like a bent one

Have to admit that would not have been my first guess. What does a bent pushrod sound like? Does it have hydraulic lifters? Are the preloads right?

[greymrj]

I agree, bent pushrods has never been an issue with these engines as far as I am aware. A tappet coming loose is far more likely and i would certainly check that before stripping down.
There is however an occasional issue with cams on these engines having very thin hardening and a lobe wearing badly. If you find one clearance far too large, adjust it to correct levels, if that problem reappears fairly soon you may have worn through the case hardening of a cam lobe.
If that proves to be the case then talk to Burton Power about reprofiling or replacing.

[HooferUK]

Good afternoon
Little advice AGAIN please
TVR S2 2.9l G67 ARV (Been about a bit)
Been having a loud ticking noise from the top of the engine, replaced the exhaust gaskets and just did the valve clearences. The clearenced given were .35 inlet and 0.4 outlet.
This has given the engine a constant chatter from the valves, I had to loosen off alot of them to get to this?? Anyway, no hydraulic lifters so i should have it right but it's quite loud now. Could the cam have been changed and there for the gaps would be wrong? paah I and getting such a bloody bad back lol
Thank you in advance
Peter

[TwinKam]

HooferUK said:

Good afternoon
Little advice AGAIN please
TVR S2 2.9l G67 ARV (Been about a bit)
Been having a loud ticking noise from the top of the engine, replaced the exhaust gaskets and just did the valve clearences. The clearenced given were .35 inlet and 0.4 outlet.
This has given the engine a constant chatter from the valves, I had to loosen off alot of them to get to this?? Anyway, no hydraulic lifters so i should have it right but it's quite loud now. Could the cam have been changed and there for the gaps would be wrong? paah I and getting such a bloody bad back lol
Thank you in advance
Peter

Not teaching you how to suck eggs, Peter, but...
a) are you sure you have the measurements correct ie inch or mm?
b) what method are you using to determine which valves to check/adjust? I seem to remember that the valves on those Colognes are not arranged in the regular way...

Edited by TwinKam on Sunday 9th October 16:42

[HooferUK]

TwinKam said:

Not teaching you how to suck eggs but...
a) are you sure you not only have the measurements correct ie inch or mm?
b) what method are you using to determine which valves to check/adjust? I seem to remember that the valves on those Colognes are not arranged in the regular way...

I have them correct, in mm and inch, followed the plan in the granada Haynes and the Sierra Haynes (Both the same). The car was raced a little looking back in its history. I might bring in down a few to say 25/30 and see if that works

[GreenV8S]

If you used feeler gauges to check the clearances then do it again with a dial gauge. It's known for the rockers to wear into a dished shape which causes a false reading from the feeler gauges.

[TwinKam]

As long as you're sure, it was a mistake often made back in the day.

[mentall]

This picture shows the 2.8 engine which has 'siamese' (2-exhaust-port) heads.
If OP has an S3, it should have the later 2.9 engine with alternating (IEIEIE) ports.
Best to look at the later editions of the Granada or Sierra V6 manual.

[TwinKam]

I stand corrected. A distant memory!

[Adrian@]

Can I suggest that the vac pipe going around the air box be checked for collapsing and then causing the PCV to chatter (as it sucks and releases). A@

[HooferUK]

Ok
back under the bonnet, checked all clearances and which valve is where. All correct but
it could be me but still noisy, all valves ticking so it could be me being fussy I'll run it up tomorrow for 10 minutes and post a video. Also checked the engine numbers to check no hydraulic lifters!!
also got to open the silencer tomorrow and removed the vibration inside!! maybe just weld the corrugated steel down or remove?