injection pump?
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
Did you do the overhaul when it was done last time?
Thinking about this for a while now, wonder if there is a possibility there is a taper in the cylinder, tighter at the bottom?
Or if there is a possibility that piston was slightly larger than the others in the skirt area?
When you removed the injectors, was the # 7 injector tip wet with fuel?
As I look at that picture it looks like something caused the piston skirt to be out of round or the wrist pin holes are out of alignment or possibly the connecting rod is bent slightly pushing the piston to on side of the cylinder.
Can you post another picture with the wrist pin sitting vertical?
Both of those damaged areas are on the same end of the wrist pin aren't they?
Was the bottom picture on the intake or exhaust side of the cylinder?
Something is causing that piston to not set square in the cylinder.
If it is setting square, then there is a problem with the piston.
That looks like rather heavy contact in the bottom picture judging by the ridge at the edge of the chamfer.
Thinking about this for a while now, wonder if there is a possibility there is a taper in the cylinder, tighter at the bottom?
Or if there is a possibility that piston was slightly larger than the others in the skirt area?
When you removed the injectors, was the # 7 injector tip wet with fuel?
As I look at that picture it looks like something caused the piston skirt to be out of round or the wrist pin holes are out of alignment or possibly the connecting rod is bent slightly pushing the piston to on side of the cylinder.
Can you post another picture with the wrist pin sitting vertical?
Both of those damaged areas are on the same end of the wrist pin aren't they?
Was the bottom picture on the intake or exhaust side of the cylinder?
Something is causing that piston to not set square in the cylinder.
If it is setting square, then there is a problem with the piston.
That looks like rather heavy contact in the bottom picture judging by the ridge at the edge of the chamfer.
Thread Starter
|
Freshman User
Joined: Jul 2008
Posts: 45
Likes: 0
i'll get more pictures tomorrow, will have to sleeve it and go with a 040 so as long as the rod is ok (check that tomorrow) i'll just test fit the piston before assembly to be sure.
and the injector was soaked along with the one i used to test with.
i think the noise i was hearing on both engines was hydrolock
pump is junk imho
thanks
and the injector was soaked along with the one i used to test with.
i think the noise i was hearing on both engines was hydrolock
pump is junk imho
thanks
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
Good luck with sleeves, personally I would look for another engine block.
A hydrolock, engine will not turn over.
It starts to crank and stop dead like there is a brick in the cylinder.
That could bend a rod enough to cause that look on the piston.
When you pull and injector and the tip is wet with fuel, that is a good indication you need new injectors.
If the injector pintle is staying open, compression gets back into the injector and could be the knocking sound you are hearing.
A hydrolock, engine will not turn over.
It starts to crank and stop dead like there is a brick in the cylinder.
That could bend a rod enough to cause that look on the piston.
When you pull and injector and the tip is wet with fuel, that is a good indication you need new injectors.
If the injector pintle is staying open, compression gets back into the injector and could be the knocking sound you are hearing.
Thread Starter
|
Freshman User
Joined: Jul 2008
Posts: 45
Likes: 0
what happens is fuel, anti freeze, water sucked in to the combustion chamber.
and you can't compress a liquid (in automotive applications anyway) so something has to give like crank shaft, bearings, connecting rod or in this case piston. l
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