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Crankcase pressure testing
Posted: Sun Apr 03, 2005 6:21 am
by wistech
After getting the cyllinder head on and cover I highly recomend pressure testing the system. Its actually very easy.
Only test using 5 to 10 psi REGULATED air pressure.
Plug off The starter vent ,rear oil inlet and scavange pump fitting. Install starter [attachment=4491:post_822...69571646.jpg]
Posted: Sun Apr 03, 2005 6:28 am
by wistech
You may hear some air leaking out the intake or exhaust. This is normal leakage through the piston rings. I spray soapy water on all oringed areas to check for bubbles. The oil bridge is a very common area to have leakage. The orings are easly damaged during instalation.
[attachment=4492:post_822...69571761.jpg]
Posted: Sun Apr 03, 2005 6:30 am
by wistech
Check the head feed lines.
[attachment=4493:post_822...69571846.jpg]
Posted: Sun Apr 03, 2005 6:31 am
by wistech
Oil inlet lines.
[attachment=4494:post_822...69571956.jpg]
[attachment=4495:post_822...69572084.jpg]
Posted: Sun Apr 03, 2005 6:32 am
by wistech
Also check the cam cover and seals. Cartridge plate and the whole block /case . Any cracks will bubble.
Posted: Sun Apr 03, 2005 7:00 am
by wistech
The tdc bolt also needs a good seal.
Posted: Sun Apr 03, 2005 7:04 am
by wistech
I cant stress enough to be sure to use a regulator on your air supply. No more than 5 to 10 psi!!!! Any more and you run the risk of damaging the block plugs ,seal or maybe even rupture.
Posted: Sun Apr 03, 2005 8:54 am
by cdrider02
Good info, thanks
Posted: Sun Apr 03, 2005 10:48 am
by claas900
...Dido good info..Thanks for takeing the time to show us..
Posted: Sun Apr 03, 2005 12:14 pm
by wistech
Thanks . I guess Im kinda going by how many phone calls I get on a particular subject to get a picture walk through. This needs to made a sticky.