Engine Rattles
Discussion
In the last few thousand miles I've been hearing a 'rattle / chatter' from the engine for a couple of seconds when I back off the throttle, ('96 Griff 500). I had the rocker arms changed which cured the noise for a few hundred miles, but then it came back - not quite as bad though. Dealer says this noise is 'normal' for 500's of this age, (45k miles) and it returned when the new parts bedded in. Anyone else come across this?
Long shot - it's not an exhaust manifold is it?
I have a small split developing and, to my thick ears, when it started I thought it was a cam rattle a cold. As it warmed it seemed to disappear. After investigation and now it's developed a bit it's clear that it's more like when the gaskets started going last year......
I have a small split developing and, to my thick ears, when it started I thought it was a cam rattle a cold. As it warmed it seemed to disappear. After investigation and now it's developed a bit it's clear that it's more like when the gaskets started going last year......
In the last few thousand miles I've been hearing a 'rattle / chatter' from the engine for a couple of seconds when I back off the throttle, ('96 Griff 500). I had the rocker arms changed which cured the noise for a few hundred miles, but then it came back - not quite as bad though. Dealer says this noise is 'normal' for 500's of this age, (45k miles) and it returned when the new parts bedded in. Anyone else come across this?
My 96 500 rattles as the revs fall from about 1500 to 1000 RPM. Everything else seems to be fine, though, so I'm just keeping an eye (ear?) on it for now.
Paul.
I've got the same with my 500. It's a 2002 car with just 7,000 miles. I'd guessed that it's the camshaft gone but took it to TVR Power yesterday for another opinion. They reckoned that it's lazy cam follower and suggested not to worry unless it gets worse. I am toying with the idea of having the TVR Power upgrade done in the winter so am hoping that it'll cure it then. Concerned though that others have done this and it came back after a few hundred miles ???
Sounds like I'm not the only one with a Griff that makes this noise. I hope it's not worn cams - it's been an expensive 6 months already, (clutch, diff rebuild, rockers). I don't reckon it's the manifold gaskets as there is a slight leak in one, which makes a different noise when cold. I'd be interested to know if RPI can shed any light on this macdeb.
My car was making a knocking noise when lifting off the throttle 2000-1500 rpm, I was told it was the cam but when they went further into it they found the big end bearings had gone 
Mine started just when it was hot but then developed into a knock that could be heard when first starting as well. The cam was worn when they took it apart so maybe there was 2 problems, the cam bearing had shifted forward, this uncovered a oil way and caused low oil pressure at the crank.
Mine started just when it was hot but then developed into a knock that could be heard when first starting as well. The cam was worn when they took it apart so maybe there was 2 problems, the cam bearing had shifted forward, this uncovered a oil way and caused low oil pressure at the crank.
My cam lasted till around 65k but this was considered an exception to the rule
Not at all. The big problem is a lot of Griffs with 30,000 miles on the clock when really its 60,000 miles. Thats what the boys in the know tell me, a lot of suspect mileages. As long as you don't thrash the balls out of it when its cold and use good thick oil you should have no problems unless your very unlucky.
Not at all. The big problem is a lot of Griffs with 30,000 miles on the clock when really its 60,000 miles. Thats what the boys in the know tell me, a lot of suspect mileages. As long as you don't thrash the balls out of it when its cold and use good thick oil you should have no problems unless your very unlucky.
Sounds similar to my engine.
See the thread on the engine forum:
www.pistonheads.com/gassing/topic.asp?t=43253
See the thread on the engine forum:
www.pistonheads.com/gassing/topic.asp?t=43253
A few more things to think about then....most of them sound expensive! I'll give RPI a call and see what they think. I've got no reason to believe mine's been clocked. I've had it for 3 years and it came with a shedload of documentation that all ties up - so if the cams have gone it's at about 48k. I'll let you know what I find out.
finston said: My cam lasted till around 65k but this was considered an exception to the rule
Not at all. The big problem is a lot of Griffs with 30,000 miles on the clock when really its 60,000 miles. Thats what the boys in the know tell me, a lot of suspect mileages. As long as you don't thrash the balls out of it when its cold and use good thick oil you should have no problems unless your very unlucky.
The history for my car is good, and I know it was looked after, I don't want to get into an argument over this so lets agree to disagree.
As it happens my car was put on the RR at Power Engineering and the diagnosis was not good, the poor low rpm driveability was found to be caused by number 7 and 8 inlet valves leaking like hell. So off to V8 again for a bit of remedial headworks......arse, bugger and damn!
On a positive note the power was well up there and once the heads are sorted and the map tweaked shall easily claim 'Beast' status
I would say your car has been well looked after and has the right mileage thats why your cam lasted well.
The problem is owners disconnecting the clock, which is very easy to do, anyway this is what my mate tells me and he works for one of the main dealers.
Or it could be that the previous owner never loved or looked after his or it could be just bloody bad luck.
The problem is owners disconnecting the clock, which is very easy to do, anyway this is what my mate tells me and he works for one of the main dealers.
Or it could be that the previous owner never loved or looked after his or it could be just bloody bad luck.
Result!! car is given the thumbs up and is running fine. Leak ups were done off rocker and all cylinders were less than 5%! which is farkin amazing for an engine of this mileage.
Fault was down to a lambda sensor doing the Lambada, outputs were ok when checked (I've got the print outs) so am running open loop for now.
Fault was down to a lambda sensor doing the Lambada, outputs were ok when checked (I've got the print outs) so am running open loop for now.
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