Noise from the front of the engine

C

clivez

Club Member
Question for the Z Knowledge Bank out there - a regular, repetitive squeaking/chuffing sound has started from the front of the engine somewhere on my 240Z. It is a standard engine running on triple webers, rebuilt 3 years ago and running quite well. The noise varies according to the revs, it is quite audible outside the car but I can't pinpoint it - seems to be more on the carb side. Any ideas?
 
I had a similar chuffing noise from my 240. Turned out to be the timing chain tensioner. It had worn through the black insulation and the chain was rubbing.
 
clivez said:
Question for the Z Knowledge Bank out there - a regular, repetitive squeaking/chuffing sound has started from the front of the engine somewhere on my 240Z. It is a standard engine running on triple webers, rebuilt 3 years ago and running quite well. The noise varies according to the revs, it is quite audible outside the car but I can't pinpoint it - seems to be more on the carb side. Any ideas?
Click to expand...

My first thoughts are exhaust manifold not sealing on the head or gasket blowing (had that a few times) - do you have a tubular manifold, if so they are more prone to it than the cast ones.

Water pump?
 
Thanks, guys. It's a cast manifold but with the squeaking element to it I think the timing chain tensioner sounds more probable than a manifold leak. Bit of a bigger job though! I'll check he water pump first.
 
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