Quote:
Originally Posted by petecooke
I have a 83 240d which had a bent #3 cylinder intake valve. The head has been fixed but I need to replace the piston. I'm going to get new rings for the piston. The other cylinders were measuring 350-400psi.
Should I replace the rings on the other cylinder since I have the motor apart?
Do the cylinders need to be honed when new rings are installed?
I spoke with a guy that rebuilds engines and he said just to replace the rings when you put the new piston in and not worry about doing anything to the cylinder.
Any thoughts?
Thanks for any help.
pete
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No disrespect intended......but that guy is an idiot....
You need to read the Factory Shop Manual for your car...
it lists in detail more anal than you can imagine exactly what you need to do to determine what you need to do to do this whole thing correctly.
This is not an old gas lawnmower where you can slap a set of chrome rings into an old bore and it clean it up and last a pretty reasonable time....
To do this right you need to pull that bore sleeve, put in new once, measure your piston , hone the cylinder out to be the right size to fit THAT piston, and install the rings according to the FSM....
At that psi I would not bother to address the other cylinders....
BUT, what extent do you mean you have the motor apart ?
If you have the other pistons out.. then you need to do that to all of them ...