Quote:
Originally Posted by GregMN
If it is a stuck plunger: would it work to put hydraulic pressure against the top of the plunger to push it down onto the cam and then hold it there while the cam is rotated enough to free it ? If so, what would the best fluid be ? ATF, MMO, Seafoam, diesel, B100
The advantage of this method (if it is viable and works) would be that you do not have to open up the pump and risk having things go horribly wrong.
|
The Delivery Valve only allows Fuel to go out of the Fuel Injection Pump. That means you need to at lest remove the Center Valve from it. And, if you intend to change the Copper Crush Washer I believe you need to remove the whole Delivery Valve anyway.
The problem is that you do not know what position the Camshaft Below it is in.
If the Camshaft is positioned so that the Lobe is at the Top and you apply Hydraulic pressure you may damage something.
If you tap it as I suggested you have little chance of damaging anything.
Unless the Plunger is actually rusted to the Barrel it should not take much force to move it.
I never explains what happens.
Either the stuff in the Fuel Injection pump dried up with the Plunger all the way to the top or there was gunk dried up inside of the Barrel and the Plunger was pushed up through the gunk and wedged in.
The Plunger only needs to be wedged in enough to keep the Plunger Return Spring from bringing it back down.
If the Plunger was rusted in the up wards position or the Plunger was pushed up over rust it is going to be stuck a lot harder and the Plunger and Barrel will have some damage.
The Damage may or may not effect performance but would decrease longevity and may make the Fuel Delivery off on that Element. But, you would not now until you run the Engine.