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rattling top end help!
- Thread starter Fred@BTM
- Start date
ForceIndia
ClioSport Club Member
Gentlemans spec 200
Sounds like a 306gti engine after a dodgy cambelt repair
they're all in spain testing the porsche for the lemans series
and this has nothing to do with yozzasport, and we're still very good mates, so cork it :rasp:
Thats what he thinks... ;-)
Anyhow - we have both scratched our heads over it for a few days and not heard anything like it before...
/y0z
ITB'd MK1
tried a different de-phaser pulley yet? if it's lost it's "tension" (for want of a better phrase) internally it could be slopping about
right there's no noise coming from the dephaser (i ran the engine with the covers off) haven't bothered changing it as i don't see the point
its had a different set of tappets thrown in
interestingly the noise seems to be coming from the plenham which is very odd
i'm 300% baffled by this car!
its had a different set of tappets thrown in
interestingly the noise seems to be coming from the plenham which is very odd
i'm 300% baffled by this car!
well according to the owner the car was taken for a test drive buy the potential new owner, who's obviously ragged it, but the car was low on oil (no warning light) then the noise started
the owner has put in 4/5L of new oil in and then it came to me 4 days after having new oil, i drained the "new oil" and it was black
there's no bottom end knock, there's no damage to the cams/rockers etc everything appears fine
i don't know the full history of this car, i do know that during mapping by "the tuning comapny" the original engine dropped a valve and totalled the engine, it has been fully rebuilt with high comp pistons, cams etc etc
if a valve was hitting a piston i doubt it would run
Christopher
ClioSport Club Member
Z4M
Who built the engine Fred?
Sounds weird
Sounds weird
It will run if the valves are "kissing" the pistons. It sounds the same or similar to noisey tappets....but tbh the noise in that vid is very excessive for this.
Also this has high comp forged pistons?? these usually allow ALOT more clearance than stock items.
Is it localised to one area of the head?? Have you check all the rocker arms??
Another thing to check if its been ran low on oil is that the cam journals havent worn, so the cam(s) are literalls slapping about in the head.
Also this has high comp forged pistons?? these usually allow ALOT more clearance than stock items.
Is it localised to one area of the head?? Have you check all the rocker arms??
Another thing to check if its been ran low on oil is that the cam journals havent worn, so the cam(s) are literalls slapping about in the head.
drives fine, haven't thrashed it but it goes fine upto 5000rpm
its meant to have high comp pistons in it
rockers are all find and cam lobes were all identical
the thing is it was ok before, something has happened to it on the test drive to cause the rattle (sounds like there is a nut rattling round inside the plenham)
worth whipping the sump off and having a look?
its meant to have high comp pistons in it
rockers are all find and cam lobes were all identical
the thing is it was ok before, something has happened to it on the test drive to cause the rattle (sounds like there is a nut rattling round inside the plenham)
worth whipping the sump off and having a look?
erm....youve basically said it had like a litre of oil in it on the test drive!
doesnt sound like big ends to me tbh. they show up more on load and over run at like 3000 rpm, pretty quiet on idle.
Its probably had enough oil in to keep the bottom end lubricated, but not enough to provide sufficient flow to the top-end.
I reckon its the inlet cam journals.....
doesnt sound like big ends to me tbh. they show up more on load and over run at like 3000 rpm, pretty quiet on idle.
Its probably had enough oil in to keep the bottom end lubricated, but not enough to provide sufficient flow to the top-end.
I reckon its the inlet cam journals.....
ITB'd MK1
got access to a bore scope?
right i'm still baffled!! head came off today and there's nothing wrong with that either!
its had a spare set of tappets
a spare vvt pulley
a spare exhaust pulley
and it still rattles its tits off
the only thing left to check is the bottom end, but the rattle ain't coming from there so i don't see the point!
its had a spare set of tappets
a spare vvt pulley
a spare exhaust pulley
and it still rattles its tits off
the only thing left to check is the bottom end, but the rattle ain't coming from there so i don't see the point!
LY 182
piston slap?? some of these forged pistons sound awful normally on startup but its something to think about
nothing wrong with the cam journals as stan suggested?
bearings on the roller rockers ok?
no evidence of valve/piston contact?
exhaust cam pulley is rubber bushed from memory i think.. that worn?
nothing wrong with the cam journals as stan suggested?
bearings on the roller rockers ok?
no evidence of valve/piston contact?
exhaust cam pulley is rubber bushed from memory i think.. that worn?
ITB'd MK1
any idea what the pistons are?
time to take the bottom end apart I think. Could be as simple as the oil pump chain is touching the cover
time to take the bottom end apart I think. Could be as simple as the oil pump chain is touching the cover
Martin_172
ClioSport Club Member
Not an injector is it?
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