Ticking Noise

[donatien]

I've got a slight ticking noise coming from up front, which is more evident under acceleration, and does rise in line with revs. I get no such noise when I ease off.

Before someone says is it the clock.....

Could this be one of the exhaust manifolds about to give up and if so can I check?

Cheers

Dave

[Hoover.]

my ticking was the manifold gaskets...... (this was missed by an indie who advanced my timing to try and cure thinking it was pinking . )

[donatien]

Hoover. said:

my ticking was the manifold gaskets...... (this was missed by an indie who advanced my timing to try and cure thinking it was pinking . )

Yeah cheers I meant gaskets not manifolds. Isn't there a trick where you can hold a piece of paper and sense the leakage?

[bluebottle]

Is it noticable when you rev it freely (ie bonnet up and stationary) or more so when under load?

[donatien]

bluebottle said:

Is it noticable when you rev it freely (ie bonnet up and stationary) or more so when under load?

Just tried that, not much of the ticking noise at idle or even when revving at stationary, does seem to be under load.

Hard to tell at speed as the general noise obfuscates but if I was hazarding a guess it seems more pronounced down the 1500-3000 rpm range?

[reeso]

Tappits?!

[Simon.b]

Check the rear bolt on the passenger side manifold. This is the hardest one to access and doesn’t get nipped up as much as the others.

Cheers,

Simon.

[bluebottle]

reeso said:

Tappits?!

That would be my guess to, which could also mean a worn cam.
If it were a manifold leak it would be very noticable with your head under the bonnet and also much louder on a cold engine - manifold leaks usually quieten down a bit as the engine fully warms up.

Edited by bluebottle on Thursday 22 March 12:02

[reeso]

That was exactly what I had. Top end rebuild at 25k miles. What a bugger! Much better now and faster, but £4k lighter! (Had lots of other bit done too)
Get it on a roller or to a speciallist. They will soon tell you.

[steve-v8s]

Two other things worth checking, I have had both of these :-

A small stone stuck in the alternator drive belt.

Or

Bearing in the belt tensioner. When mine failed Had it sounded just like a hydraulic tappet that had failed to prime. It was very difficult to decide exactly where the sound was coming from and even had the experts confused. Obviously both of these are easy to prove, just pop the belt off and have a listen.

[davetherave1970]

I've got the same at the mo. It's having new fanimold gaskets fitted next Tuesday
NSR has been leaving a black deposit on the plug lead.
Take a look at all the plug leads to see if this give you a clue!

Edited by davetherave1970 on Friday 23 March 11:52