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Engine Specific Info and Questions => IDI Engine => Topic started by: riceatingrabbit on November 28, 2009, 08:25:10 pm

Title: what caused this? injector? timing? what?
Post by: riceatingrabbit on November 28, 2009, 08:25:10 pm

last time i had the head off my rabbit, two pistons were pitted like this...

I didn't have the time or money to replace them, so i just put it together "as is"...

I'm wondering if you guys know what typically causes pitting like this? I'm going to be tearing down my engine again here in a few weeks, and Im trying to gauge the importance of replacing the pistons...

(http://i48.photobucket.com/albums/f233/greg_3821/DIESEL%20RABBIT/e4.gif)
(http://img121.imageshack.us/img121/9124/pb150944.jpg)


what do you guys think?

Title: Re: what caused this? injector? timing? what?
Post by: truckinwagen on November 28, 2009, 08:52:39 pm

bad nozzle spray.

a worn or clogged nozzle will not spray properly, causing heavy carbon deposits and piston erosion.

-Owen

Title: Re: what caused this? injector? timing? what?
Post by: riceatingrabbit on November 28, 2009, 09:00:35 pm

that kinda what i was leaning towards..

so, given that, if i replaced the nozzles, am I ok to run those pistons? ive scene people run pistons with huge valve divots in them and be ok...

I am planning on turbocharging this motor after this next tear down...

Title: Re: what caused this? injector? timing? what?
Post by: truckinwagen on November 28, 2009, 09:22:39 pm

you should be fine as long as the erosion does not go to the rings