Page 2 of 2
Posted: Sun Feb 21, 2010 7:26 pm
by stagcar
DEVONMAN wrote:ppyvabw wrote:I don't think the tapping is heavy enough to be a bearing. And it's not coming from the bottom.
I aint stripping it, I will leave it until it goes bang and get my 3.9 built and put in.
It would be a good idea to compare the compression on No2 with the rest.
This will at least help to rule out some of the possible causes of the noise.
As r2d2hp suggested, a piece of hose in your ear will help to pinpoint the area.
Regards Denis
I have had somthing like this happen before and it sounded very bad! turned out the head gasket had gone home and the gass was getting out and struming on the tin inlet gasket sounded like a big end gone.
Have you done a compresion test?
Posted: Sun Feb 21, 2010 8:44 pm
by DEVONMAN
Yeah , deffo a compression test needed to eliminate the guesses.
Could possibly be a very minor head gasket leak into cam valley area or even to the outside but no misfiring/power loss steers things away from that thinking.
Regards Denis
Posted: Mon Feb 22, 2010 10:24 pm
by kstrutt1
This sounds horibly like mine, mine was also number 2, it also had good compression and ran fine, I replaced the piston, con rod, head gaskets and cam shaft to no avail, eventualy I fitted a secondhand block and pistons which finaly fixed it, on close inspction the liner in the noisy cylinder seems a mm or so lower than the rest so I suspect it was moving when the engine warmed up (it only did it on a hot engine).
Posted: Sat Mar 13, 2010 5:24 pm
by ppyvabw
All sorted I think. I had to rip the manifolds off to get the starter out today and I think it is what a few of you said, the exhaust gasket was shot to pieces. With its kind of metal 'skeleton' for want of a better phrase, some bits of the card, or fibre filling, whatever it is, had just gone so it was just blowing regardless of how much I tightened it.
I will see when I put it back together if I can get my bloody starter issue sorted without spending a fortune.
Cheers.
Posted: Mon Mar 15, 2010 2:05 am
by ramon alban
ppyvabw wrote:All sorted I think. I had to rip the manifolds off to get the starter out today and I think it is what a few of you said, the exhaust gasket was shot to pieces. With its kind of metal 'skeleton' for want of a better phrase, some bits of the card, or fibre filling, whatever it is, had just gone so it was just blowing regardless of how much I tightened it.
ramon alban wrote:
The fact that the noise stops when the spark plug is removed means it is defo combustion related.If you have exhaust manifold gaskets, and one is breached no amount of tightening will fill the gap.
..................
Posted: Mon Feb 15, 2010 1:50 am
