Isx Cm871 Injector leak test

[CM87183]

(09-14-2024 )Rawze Wrote:  

(09-14-2024 )CM87183 Wrote:  

(02-16-2024 )Rawze Wrote:  CM570/870/871 ...
If the overhead valves were out of adjustment, you can get some false positives.

Hey Rawze, how exactly does out of adjustment valves cause a false positive on an injector leak test. I've been chasing leaky injectors and I'm trying to figure out if I'm getting bad reman injectors or if there's something else going on.
Thanks

Because if the injector cam rockers are out of adjustment, they do not hold the injectors down in the closed position all the way ... making for a false positive on the test.

Hey Rawze,
I believe I have an injector that is leaking on the front half of my cm871, I get plenty of bubbles when cranking and the timing of it seems to be only one injector, but when I try and bar the engine over I can't get it to bubble. I've tried adding a smaller hose to try and make it bubble easier, but I just can't seem to get it to bubble while barring to verify what cylinder it is. Is there anything else I can try to identify what cylinder is leaking?