Here's what I have. last night I ran the compression tester over it and found several cylinders waaaayyyyyyyy low on compression (just like the Vbelt motor). I noticed they cylinders "chuffed" and crap was coming out of the exhaust ports...... Then the penny dropped.
if you store a motor for even a shortish period of time. The open valves develop surface rust and don't seat until the motor fires again. I"ve never realised this as I've never owned a compression tester before. I sprayed some wd40 down the inlet ports on the low cylinders, and after spinning the motor on the starter for a short time, they stopped "chuffing" as the valves started to seat again, and we shot upto 135->140psi (the cheap dodgy compression gauge bounces to 140psi... and drops back to 135 when you stop cranking.
I pressure washed, degreased and scraped the motor down 4 ... no maybe 5 times. I can finally see bare alloy now. I still have no idea where the leaks are. Everything was horrendously filthy, but nothing "soaking wet" with oil to guide to to the location of the leak. The engine number says its a post '88 3.9 automatic ..... Hmmm.... It has a flywheel and clutch ... and the oil cooler lines are date stamped 2002 (disco 2 ... era)....
so I was pleased to find this so I could now exactly what gasket kit to buy.
Just to give you an idea how good .... ( er ... hopeless :
) I am at this stuff. I strapped the engine crane to the carry all on the tractor and took this outside to clean. 3 sets of cloths .... a flithly tractor and a backyard of "black" grass later ... I have this to work on.
Do you like the mess I've made ?? I just dropped the motor back into the shed (I'd packed the inlet and outlet exhaust ports with rags). I noticed the rags were soaking when I pulled one out ..... Hmmm... So I pulled a plug and found water on it ..... Oh damn it. So I pulled all the plugs and filled the inlet manifold with WD40 ... and cranked it ..... Yeah, I was trying to work fast to make sure it didn't sit with water in it for long .... Guess what I forgot to hook up
I now know the oil pump is quite ok and will throw oil quite a distance across the shed
I figured now I'd thrown oil everywhere, I might as well keep going, so I squirted a good few pump of oil down each plug hole and into the inlet manifold and span it over again to coat everything in there with oil
I'm guessing all of the neighbours are going to be really impressed the first time this gets started
seeya
Shane L.
Bookmarks