bad main bearing
#11
![Default](/forums/images/icons/icon1.gif)
Damm thats nasty.What did the rod bearing on that piston look like?
The exhaust valve looks sunk into the seat to me .Need to ck valve job on that hole, all that alumiun went thru the seat
The exhaust valve looks sunk into the seat to me .Need to ck valve job on that hole, all that alumiun went thru the seat
__________________
.
The Only Time You Have To Much Ammo Is When Your Swimming Or On Fire.
.
The Only Time You Have To Much Ammo Is When Your Swimming Or On Fire.
#12
Registered
Join Date: Jan 2001
Location: Holland MI
Posts: 3,140
Likes: 0
Received 0 Likes
on
0 Posts
![Default](/forums/images/icons/icon1.gif)
There is absolutely no reason to change the other pistons unless there is something wrong with them. If all 8 are going to be removed it would be wise to measure them as well as the cylinders to verify the piston-to-wall clearance but you can get a pretty good idea of their condition by closely inspecting the cylinder walls for scuffing, scratching, things of that nature.
While you have the heads off you might want to verify the valve spring installed height. You might find out that, as Strip Poker noticed, the seats are quite low resulting in low spring pressure or needing too many shims to get the pressure up to specs.
While you have the heads off you might want to verify the valve spring installed height. You might find out that, as Strip Poker noticed, the seats are quite low resulting in low spring pressure or needing too many shims to get the pressure up to specs.
#13
Registered
Thread Starter
Join Date: Sep 2004
Location: Tarpon Springs, FL Winter/LBI, NJ Summers
Posts: 497
Likes: 0
Received 0 Likes
on
0 Posts
![Default](/forums/images/icons/icon1.gif)
They are going to replace 1 piston, rings, all rod bearings and mains, shave head, hand hone 1 clyinder, checked for cracks on heads, clean up valves - claims its ok...for 1200.00
I gave them the block and heads seperate, they will return same way....strippoker, the rod bearing was toast.
I gave them the block and heads seperate, they will return same way....strippoker, the rod bearing was toast.