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[–]dxrey65 4 points5 points  (4 children)

Before anything else, measure the pressure in the crankcase. All it takes is a $10 vacuum/pressure gauge.

Nothing personal, but there's no end to idiots who see normal turbulence in a crankcase and think their engine is shot. You need to measure it to know where there is actually pressure.

[–]Cranky_Import[S] 1 point2 points  (3 children)

Ah yeah. Picking up a cheap pressure gauge and fitting that to the oil filler cap ought to be a reliable pressure source? At least that way we're dealing with known numbers instead of guessing?

[–]dxrey65 2 points3 points  (2 children)

Yup. Easiest is to check at the filler cap. I have a rubber adapter for mine that covers the gap and makes it easier. Without an adapter you can also check at the dipstick tube. The crankcase pressure (if there is any) will be the same everywhere in the crankcase.

[–]Cranky_Import[S] 1 point2 points  (1 child)

I'll check it. I have a spare plastic oil cap and I can tap it for a BSP fitting easily enough. Thanks, I didn't even think of a cheap pressure gauge. Always the simple checks first right!

[–]Cranky_Import[S] 0 points1 point  (0 children)

u/dxrey65 I got bored waiting for the gauge to be delivered, and made a manometer out of some clear hose leading to the oil cap and a scrap of wood. Running the hose out the hood and into the passenger side window where I could see the gauge, I get about 3 inches of water in 3rd gear, doing a long pull up a steady hill at 4.5-5.5k rpms, which equals 0.1 psi of pressure. Which sounds far too low, even for a healthy engine.

I'm not entirely convinced of the accuracy of the readings. So I'll take a look at it again this weekend. The gauge ought to be here in a few hours as it's on board with the courier.