Noisy tappets/followers 2.0 T.S. Alloy top - Alfa Romeo Forum
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(Post Link) post #1 of 7 Old 18-06-15 Thread Starter
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Noisy tappets/followers 2.0 T.S. Alloy top

Recently overhauled my p1 2.0 TS Alloy top engine in my Spider 916. Replaced inlet camshaft as the current had a noisy variator, the replacement had a good variator so i just bolted replacement camshaft in along with tappets from spare engine.

I filled the engine with a very expensive 5w40 oil and started engine, it was as expected noisy but left to idle for 10mins before reving engine to 3500 rpm and holding there before slowly releasing pedal to the 800rpm idle.

The engine did idle smooth and without tappet noise. Returned several days after and start engine only to be greeted by the dreaded tappet noise, which does quiet down after 10 mins or so but its always there on a cold engine.

Pulled rocker cover off today and checked torque on cam caps and plugs and all was normal but the tappet noise remains on a cold engine. Am i using the wrong oil? or might it be the tappets are the problem? Or might it be something else?

As always all pointers appreciated.
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(Post Link) post #2 of 7 Old 19-06-15 Thread Starter
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Read a few threads last night and as a result pulled cam cover off this eve. Tried compressing tappets on inlet side and found 4 rigid and four that could be compressed.

There appears to be two opposing views in that one side argues that followers should be rigid while other side argue that there should be some give in order to prevent the tappet slap.

I find myself coming down on the "Give" side as i installed 8 tappets from an engine that has been sitting for a few yrs and since them i have had this disturbing ford escort tappet racket.
I have dismantled the 8 original tappets and have them soaking in solvent and will reassemble tomorrow before removing cambelt again on sunday in order to install and hopefully rid, from that annoying and worrying tappet rattle.
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any update? I have six firm and two squashy!
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(Post Link) post #4 of 7 Old 22-06-15 Thread Starter
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Hi Purple,

I did install the 8 clean tappets and she is purring like a cat now As for the 'Rigid' Vs "Give" after priming the cleaned tappets with fresh oil on the bench they all went rigid, did abit more research and discovered that oil is not compress-able and therefore rigid will be normal if they are fully primed.

Apparently, when the engine stands they will leak down normally hence why some are compressable. Having cleaned them now i would rcommend that if you have the tappet noise then, remove them, strip and clean. Then prime before you reinstall them, there is a good vid on utube with a guy showing the strip, clen and prime on VW tappets which are identical to the twinspark engine.

There are 8 components and the one easiest lost is the tiny spring that the ball sits on in the release valve. A magnet is a great tool for this job and its easy once you have done one or two.

Last edited by EauRouge; 23-06-15 at 17:17.
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Do you have to remove the camshaft completely (and therefore, the timing belt) every time you need to remove a tappet or can they be taken out "In situ".

Cheers
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(Post Link) post #6 of 7 Old 23-06-15 Thread Starter
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That's a good question ransoman, the tappet buckets are 2.5cm deep and with camshafts in place you will not have 2.5cm to be able to lift them out. I reckon if you have a noisy tappet on the gearbox side, you could probably loosen the caps on that side and possibly get the tappet out? Personally id say its too much hassle and would prefer to just remove camshaft/s.
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cheers ER, a great help
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