hey ya'll.
I have a built motor with a IAG stage 1 block and some GSC valves and retainers in the heads. 2500 miles, not even done with break-in
I had an issue of oiling coming out onto the engine bay from the turbo. I thought my turbo seals were done but wanted to check further with a compression test and leakdown.
cylinder 2 has lower compression than the others, 105. (115,105,115,120). i did the leakdown on all cylinders and they were great leadown numbers 3-4% except for cylinder 2 which has leaky exhaust valves. I did the leakdown test a ton of times to confirm this, making sure i was at TDC on the compression stroke.
did the teardown of the heads and everything seemed fine but i did the water test of the valves. water leaked into the exhaust port after 5 minutes. i told IAG about this so they could teardown and inspect.
1 month later, IAG tells me theyre perfect....what?!?! and also said the engine department said its not unusual for water to leak past the valve even if theyre perfect sealed. i always thought valves are suppose to be airtight seals, especially when new. or am i completely wrong?
they say potential issue might be in the short block or cam timing. not sure if that is true but would like any insight into this if anyone has anything helpful.