Vehicle & Technical > Range Rover

Rapping, tapping noice under load

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Jonny Boaterboy:
I have a strange noice coming from my 3.9 V8 when you put some load on the engine i.e. accelerate or tow a trailer, there is a noise that sounds like a tapping noise which is increased with the load and not there at all on tick over. My first guess would be that it was the tappets, but I belive they self adjust so should not tap

Does any ony know what it could be and if I need to worry about it! The engine has done 150000 but it is good order

Thanks jonny 

Guardian.:
mine was the liner moving up and down a cracked block! a recon one from v8 developments! and now have a tapping one from them, they couldnt build a frigin lego wall i dont think let alone rebuild engines.

hairyasswelder:
Mine was doing that and it was an exhaust manifold gasket that had gone  :?
Took bloody weeks to find it  :twisted:

Jonny Boaterboy:
Well I hope it is't the liners! I thought liners were only on the 4.2? Hey, Guardian was there no black exhaust marks where it was leaking on the manifold? Now you mention it it does sound like that could be it..... ummmm maybe I just want it to be that! will have a look tommorow. I'm changing the timeing chain this week so just wanted to make sure that nothing major was about to give up  :pale:

ben_haynes:
i am with hairyasswelder mine had been blowing from the day i fitted the manifolds and it had no black soot marks round the manifoldfitted and tightened the bolts and it has now gone

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