A very worrying tapping...
Discussion
Took the car out the other day for just a general drive around.
After quite a while, I decided to press the throttle on a dual carriageway, hard, but certainly not about 6,000rpm.
After about half mile or so, I slowed for a roundabout and heard a rather rapid tapping noise from the engine varying in speed with the revs.
Ok, Not using car atm as want to get this sorted.
Any suggestions on what is causing this?
Been an annoying couple of months. But hopefuly will get the few problems sorted soon and I'll be happily enjoying her again soon.
Edited to add, the tapping noise disappears again after about 5 mins more casual driving
After quite a while, I decided to press the throttle on a dual carriageway, hard, but certainly not about 6,000rpm.
After about half mile or so, I slowed for a roundabout and heard a rather rapid tapping noise from the engine varying in speed with the revs.
Ok, Not using car atm as want to get this sorted.
Any suggestions on what is causing this?
Been an annoying couple of months. But hopefuly will get the few problems sorted soon and I'll be happily enjoying her again soon.
Edited to add, the tapping noise disappears again after about 5 mins more casual driving
Edited by WazzaL on Tuesday 5th February 13:49
WazzaL said:
Took the car out the other day for just a general drive around.
After quite a while, I decided to press the throttle on a dual carriageway, hard, but certainly not about 6,000rpm.
After about half mile or so, I slowed for a roundabout and heard a rather rapid tapping noise from the engine varying in speed with the revs.
Ok, Not using car atm as want to get this sorted.
Any suggestions on what is causing this?
Been an annoying couple of months. But hopefuly will get the few problems sorted soon and I'll be happily enjoying her again soon.
The easy way of finding out if your manifold is blowing is stick the car in 5th at about 30 mph and put your foot to the floor. If you have a leak the tapping will get louder.After quite a while, I decided to press the throttle on a dual carriageway, hard, but certainly not about 6,000rpm.
After about half mile or so, I slowed for a roundabout and heard a rather rapid tapping noise from the engine varying in speed with the revs.
Ok, Not using car atm as want to get this sorted.
Any suggestions on what is causing this?
Been an annoying couple of months. But hopefuly will get the few problems sorted soon and I'll be happily enjoying her again soon.
Mine does that too, but comes and goes...Levens reckoned that it was probably a sticky hydraulic lifter after they inspected it for me a year ago. Am going to get it checked out again at the 6k service which is due now. Have heard that if it's the exhaust manifold then the ticking is usually permanent so I know it's not that.
I'll post again once I get the verdict.
I'll post again once I get the verdict.
The fact it comes after a hard drive and goes after more gentle running could be a heat issue.
Working the engine hard creates more heat. Something heats up enough to the point it can cause detonation.
Is the noise anything like pinking?
After a time driving gently it cools down enough for this to stop happening.
Working the engine hard creates more heat. Something heats up enough to the point it can cause detonation.
Is the noise anything like pinking?
After a time driving gently it cools down enough for this to stop happening.
Initally I would have said exhaust gasket as that can cause a very worrying tappety noise which increases under load and with engine speed. But if it comes and goes them I doubt if this is the cause.
Interesting what Uncle fester said about pinking and detonation. If it is this then it would be interesting to see if a higher octane fuel changes things. Some engines are known to pink a bit on 95 octane but be better on fuels like V Power 99 octane.
Interesting what Uncle fester said about pinking and detonation. If it is this then it would be interesting to see if a higher octane fuel changes things. Some engines are known to pink a bit on 95 octane but be better on fuels like V Power 99 octane.
Firstly double check your oil level.. Could be a pressure issue as the oil heats and then thins.. (dont trust the guages)
It could be a sticking hydraulic tappett that gets worse as the engine gets hot..
It could also be a very slight leak in the manifold gasket. I thought i had a tappett issue on an old BMW and it was the manifold gasket. Yes normally i would say it would be constant but since different parts of the engine / exhaust will expand and contract at different rates due to heat causing a slight leak so it could still be an issue.
If in doubt get it checked out by a garage you trust. To the trained ear they should be able to diagnose the issue pretty quick. thats my 5p worth
It could be a sticking hydraulic tappett that gets worse as the engine gets hot..
It could also be a very slight leak in the manifold gasket. I thought i had a tappett issue on an old BMW and it was the manifold gasket. Yes normally i would say it would be constant but since different parts of the engine / exhaust will expand and contract at different rates due to heat causing a slight leak so it could still be an issue.
If in doubt get it checked out by a garage you trust. To the trained ear they should be able to diagnose the issue pretty quick. thats my 5p worth
WazzaL said:
Thank you all.
Sounds like its a sticky lifter. But will at some stage soon head on down to a garage. - Can these be fixed easily?
Will double check the oil, but this should be ok!!
I've been told it's not an easy fix as there is a lot of dismantling involved. I too have the same problem but have been told not to worry too much and that the car won't blow itself up with that as the cause. Anyone know more?Sounds like its a sticky lifter. But will at some stage soon head on down to a garage. - Can these be fixed easily?
Will double check the oil, but this should be ok!!
Mine ticks a bit and has done for 3 years. The opinion of both a very well respected TVR dealer in the N.E and a local Aston Martin indy was
'Yes it's ticking. Some do, some a lot more than others. Nothing major probably just a sticky lifter, unlikely to blow up. Just drive it, it's the other end you should listen to
'
'Yes it's ticking. Some do, some a lot more than others. Nothing major probably just a sticky lifter, unlikely to blow up. Just drive it, it's the other end you should listen to
'Andychim400 said:
Mine ticks a bit and has done for 3 years. The opinion of both a very well respected TVR dealer in the N.E and a local Aston Martin indy was
'Yes it's ticking. Some do, some a lot more than others. Nothing major probably just a sticky lifter, unlikely to blow up. Just drive it, it's the other end you should listen to '
As I said above, this is what I was told. The engine was rebuilt about three years ago (before I had it) so I'm not too worried.'Yes it's ticking. Some do, some a lot more than others. Nothing major probably just a sticky lifter, unlikely to blow up. Just drive it, it's the other end you should listen to
'rev-erend said:
I wound get it checked out quickly..
The RV8 does have liners (pistons run in these) and they have been knows to move .. a slight tapping that gets worse.
Result is one scrapped engine block.
Sorry to scare but it does happen.
I'd 2nd this... I'd rather go get the car checked out and they confirm its nothing to worry about than to take a chance and end up with expensive damage..The RV8 does have liners (pistons run in these) and they have been knows to move .. a slight tapping that gets worse.
Result is one scrapped engine block.
Sorry to scare but it does happen.
I've done both in my time.... and the latter is very sobering..
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