stick_witch
Full Access Member
Hey guys! So I've got my truck in the shop to fix some oil leaks and to replace my leaking injection pump and I got overly excited and took off the IP and disconnected the hard lines running to and from the fuel filter head without doing my compression tests on the cylinders of this new to me rig, and in turn made a lot more work for myself now.
I would really like to do a compression test before I go and send the pump off to be rebuilt, so I'm wondering if this can be done without spraying diesel out of the lift pump and without messing up timing on the IP when I go to put it back in (its my understanding that the pump only goes into the timing gear one way so even if it turns without the pump in it, it shouldn't matter, right?) and if so how can it be done? Is there anything I should be cautious about when doing the compression test? I have the injectors still in but no hard lines or return lines connected. Planning on using a diesel specific compression gauge with a 10x1.0mm glowplug adapter. I sorta get the gist, but not sure how it will affect my motor turning it over with no IP in it.
Truck in question is the 1989 F250 detailed in my signature.
I would really like to do a compression test before I go and send the pump off to be rebuilt, so I'm wondering if this can be done without spraying diesel out of the lift pump and without messing up timing on the IP when I go to put it back in (its my understanding that the pump only goes into the timing gear one way so even if it turns without the pump in it, it shouldn't matter, right?) and if so how can it be done? Is there anything I should be cautious about when doing the compression test? I have the injectors still in but no hard lines or return lines connected. Planning on using a diesel specific compression gauge with a 10x1.0mm glowplug adapter. I sorta get the gist, but not sure how it will affect my motor turning it over with no IP in it.
Truck in question is the 1989 F250 detailed in my signature.