Crankcase pressure testing

Message

wistech · #1 Post by **wistech** » Sun Apr 03, 2005 6:21 am

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]

wistech · #2 Post by **wistech** » Sun Apr 03, 2005 6:28 am

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]

wistech · #3 Post by **wistech** » Sun Apr 03, 2005 6:30 am

Check the head feed lines.
[attachment=4493:post_822...69571846.jpg]

wistech · #4 Post by **wistech** » Sun Apr 03, 2005 6:31 am

Oil inlet lines.
[attachment=4494:post_822...69571956.jpg]
[attachment=4495:post_822...69572084.jpg]

wistech · #5 Post by **wistech** » Sun Apr 03, 2005 6:32 am

Also check the cam cover and seals. Cartridge plate and the whole block /case . Any cracks will bubble.

wistech · #6 Post by **wistech** » Sun Apr 03, 2005 7:00 am

The tdc bolt also needs a good seal.

wistech · #7 Post by **wistech** » Sun Apr 03, 2005 7:04 am

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.

cdrider02 · #8 Post by **cdrider02** » Sun Apr 03, 2005 8:54 am

Good info, thanks

claas900 · #9 Post by **claas900** » Sun Apr 03, 2005 10:48 am

...Dido good info..Thanks for takeing the time to show us..

wistech · #10 Post by **wistech** » Sun Apr 03, 2005 12:14 pm

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.