stevostyles

because i bought my car as a project with knocking engine today i took the sump off and took off the conrod caps the shells look fairly worn but why is 1 shrunk ?? its still marked up std with same numbers as the others so dont understand how its done it ?? just to note the knocking really wasnt that bad ive heard worse.
can any 1 tell me why it could have shrunk !

m_nettleship

Wonder if this could be heat related, But a very strange one. Mind u, you dont no wat been fitted in the past.

stevostyles

do you mean if only 3sets had been changed ?

stevostyles

ive just bought some std heavy duty shells but still cant think why its done it maybe just a bad shell and heat = this.

studabear

whats the other shell like in the conrod?

stevostyles

not sure it went dark fast was going to get them out 2moz .

Alg1k

iTrader: (2)

Its done that because the bearing clearance has got to big as its worn out
This has had the crank banging on it and beaten the metal backing off the bearing making it deform,
If it had been used any longer it would have spun and ruined the crank and rod
You got lucky in one respect,
Best check the ( bearing crush in ) the rod before you rebuild the rod back into the engine,This doesnt mean the bearing to crank clearance,,

stevostyles

glad to hear i maybe lucky but you need to explain bearing crush check ?? never heard of this b4 and as for the banging it was very very slight . cheers bud

stevostyles

just looking at the torque settings 1 was definatly looser than it should have been. altho i cant remember if it was on cylinder 2 or 3 and this shell was on no3 so its possible it was this that caused it.

Alg1k

iTrader: (2)

Through the oil and block it does tend to shroud the noise .it doesn't take much to deform a bearing do a search on google for big end bearing crush,

stevostyles

cheers bud

stevostyles

ive just taken the bearings off the rod piston side and yep both no3 are crushed ie now dont fit snug in their seats. what i would like to know is thereis a very very small amount of wear on the crank journal no3 you can only just feel it if you run your nail accross the width (and no i aint gay haha) should i just fit my h/duty shells when they arrive ??????

Alg1k

iTrader: (2)

Sounds like the crank needs taking to a machine shop to be checked out there should not be and noticable wear on the crank
If you just fit the bearings im Sure it wont last very long
I estimate 500 miles !!!