Thar she Blows ! Old Faithful out of oil dipstick

[FryBird]

My 87 300SDL Turbo has about 190,000, running WVO for the past two years ~20,000 mi. but has been idling rougher a time has gone by and more smoke on start up.

Power has been fading, so Ive changed both primary and secondary filters, during so ive heard a snap of the brittle vacuum line, which when mending snapped in a different place, and mended again, I think ive got it fixed, but now that car has no power to rev in 'park' just barely chugs along, ( with a good amount of smoke ) after a bit or warming up i can get the car to move slowly along, but up hill is a major challenge.

I pulled into my driveway, opened hood, hooked up a vac\ pressure gauge to the intake manifold, and under 50 % throttle was showing about 1psi, then floored it and slowly the RPMs came up then got high RPM and a good strong 10+ Psi, then out popped the oil dipstick an shot oil about 9 feet in the air.

is there a vacuum line that might still have a crack in it that i cant see?

Ive noticed the Engine Stop lever move to the left as I increase RPM, while driving I can feel it cutting out as I try to accelerate.

I wanted to do a hot engine compression test, but by the time it took to get the intake manifold off and all the glowplugs out the engine was luke warm.

the readings keep going up after 10 cranks, so i did my at 12 cranks.

#1 425
#2 495
#3 525
#4 475
#5 500
#6 480

what was weird was # 4 would very slowly gain pressure on the first 6 cranks, then make huge jumps and top off with a good numbers at the end.

there seems to be a little bit of oil seeping near the #5 and #6 exhaust side of the head gasket which smokes up on the hot exhaust manifold.

worn valve guides ?, Rings ?

there is a definite sign of oil entering the intake manifold, and its seen caking up on the top of the intake valves.

and help would be appreciated.

thank you.

[79Mercy]

I dont think the motor is that bad, yeah there is a big difference between some of the cylinders, however i stilll think it would be strong above idle, it may shake at idle a bit.

I think the issue it fuel related, possibly the IP from running grease through it.

The gunk on the intake valves in prolly not oil, but WVO......

[kerry]

The dipstick shot out because of high crankcase pressure. The immediate suspect should be a plugged PCV hose. This pressure in the crankcase also puts pressure on the diaphragm in the shut off valve, mimicking vacuum pressure on the opposite side and shutting down fuel to the engine. So your two problems are related. Relieving crankcase pressure should fix both.

[oldsinner111]

I had that happen when running some nasty wvo.I filtered it good,but it was sticky wvo.
Now that I've been back on diesel a year my engine has improved,blow by gone.
I really believe in the 3 years I saved money on grease helped,but cost my dear engine,thankfully they forgive you sometimes
Oh yeah I replaced the O rings on the dipstick.

[Murkybenz]

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[sixto]

If your car has an oxidation catalyst, looks like a catalytic converter near the transmission, it might be clogging or clogged. There's a bolt on the #1 exhaust manifold runner. Remove the bolt and see if freeing the exhaust helps the engine rev. It'll be noisy! If it helps, you have to do something about the oxidation catalyst. You can replace it at significant cost, or if a) your conscience allows, b) your car is not subject to inspection, and/or c) you promise not to drive on public roads, you can replace it with a straight pipe or hollow it with a poker.

Engine oil in the intake manifold is somewhere between normal and unavoidable. You can thank EGR for caking it onto the manifold and valve stems. It happens to 603s that haven't seen a drop of WVO.

Sounds like you're due for a head gasket.

Sixto
87 300D

[vstech]

Originally Posted by kerry

The dipstick shot out because of high crankcase pressure. The immediate suspect should be a plugged PCV hose. This pressure in the crankcase also puts pressure on the diaphragm in the shut off valve, mimicking vacuum pressure on the opposite side and shutting down fuel to the engine. So your two problems are related. Relieving crankcase pressure should fix both.

X2!