1GM compression test
Moderator: Jim Walsh
1GM compression test
Even though the little diesel is running good I would like to do a compression test annually as part of a tune-up. I have an adapter that replaces the injector and the gauge and hose. The hose ends in 1/4 npt threads and the adapter has 1/4 npt threads. The problem is there needs to be a check valve in series with the gauge and I have been unable to find the required check valve. Does anyone out there know where I can locate one of these valves? Thanks, Charlie.
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Derek Matheson
- Posts: 52
- Joined: Sep 21st, '06, 08:07
- Location: 1981 CD28 #282 Gaelic Gal
Check valve for compression test
(12-06-07 edited post to change from 500psi to 1000psi valve)
As always Mcmaster Carr has all the goodies you need at http://www.mcmaster.com/
7775K12 Brass Spring-Loaded Piston Check Valve 1/4" NPTF Dryseal Female Connections, Buna-N Seat
In stock at $12.49 Each
Above is the 1000psi rated valve, also has a .3psi cracking pressure. A better choice.
As always Mcmaster Carr has all the goodies you need at http://www.mcmaster.com/
7775K12 Brass Spring-Loaded Piston Check Valve 1/4" NPTF Dryseal Female Connections, Buna-N Seat
In stock at $12.49 Each
Above is the 1000psi rated valve, also has a .3psi cracking pressure. A better choice.
Last edited by Derek Matheson on Dec 6th, '07, 11:20, edited 1 time in total.
1GM compression test
Thank you for your very helpful post Derek. In case someone else is referencing this post the check valve should be rated to 1000 psi for a diesel engine. Thanks again, Charlie.