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Tapping On 1 And 6

-33-

By -33-,
in Engines & Forced Induction

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-33- Community Regular

-33-

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Opened the bonnet today after a good hill climb, and there was a tapping noise above cylinders 1 and 6.

Now my car (R33 gts-t) is stock apart from full exhaust and pod. My fuel economy is about 450+ km to the tank, and the engine/gearbox seems nice and tight.

HOWEVER the turbo is on its way out (has been whistling up high for some time now and its getting worse). I only noticed the tapping develop recently. Perhaps the turbo is chewing up oil and not enough is circulating to the head? I dunno, oil pressure doesn't seem particularly low. And no oil is being spit out of the intake manifold or anything like that.

I hope its not bearings - but the noise doesn't get louder when the car gets hotter or revs higher. I've listened to other engines with bearings going and the noise they made was REALLY irritating and got worse.

Help?

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https://www.sau.com.au/forums/topic/205612-tapping-on-1-and-6/
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R34GTFOUR Mentor

R34GTFOUR

Posted
Posted

tapping is generally head, which is nothing to worry about, lifters with age just get louder and i doubt you'll notice any difference

a spun bearing on the other hand is more of a knocking noise, they are very different. If it sounds like its coming just from the head then its unlikely to be a bearing.

Its also quite common on these to get noisy injectors aswell. My bros car (has 180000km on it, but REAL kms) and his stock injectors tap.

How many kms has it done? I would check the oil first, and give it a oil/filter change aswell. If you dont really know what your looking at, it might be worth your while to take it to a performance shop and get them to give it a once over. Its always hard to diagnose something like knocks and tap noises over the net, it could be anything

-33- Community Regular

-33-

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Posted

The car has 110,000 ks on it. Its going in for a major service, then straight after that looking at a new turbo setup, PFC, injectors, pump etc etc.

It definitely is coming from the head, I put my ear next to each cylinder and listened. I'm not particularly worried because the car seems to run otherwise fine but the major service should pick up anything wrong with it either way.

Thanks alot for the reply mate =)

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