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Misplaced a hose, t-25 boosted 26 psi, any damage?

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AWDx4G63

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Discussion starter · #1 ·
Hi guys,

I am rolling the video tape back to 2 years ago when I had my t-25 turbo.

My car drives fine right now. Gas mileage is good but not sure my 26 psi boost that lasted for about 1 sec (I stopped immediately) has caused any damage minor to my engine? If so, what would break first? valve, pistons? seals?.

Car drives fine, that I could boost to 12 psi with no problem. (i am trouble shooting engine problem now). Thanks

Andrew
 
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Discussion starter · #4 ·
Cuz I have a boost leak problem is not from any hose, couplers, but inside the engine. I boost leak test from throttle body elbow and air leaks inside the engine, either from pistons, or valve seal... I changed and RTVed all throttle body gaskets and IM gaskets, block off egr, no help. Air can be collected inside the engine. Crank case is collecting pressure if I plug the PCV and recirulation hose. so I a think something in the engine is screwed up.

THis problem caused me not able to spool up my 50 trim...

NOw just want to focus to the engine as I have fixed everything on turbo side and intake side, no help.

Andrew
 
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#7 ·
Where are you hearing air at? our heads are designed that with the belt on the cam gears you will never reach a point that all the valves are closed, so of course you're going to hear air leaking into the cylinder. What did your compression test read? Leakdown test?
 
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Discussion starter · #8 ·
K_Mans_TSI said:
Where are you hearing air at? our heads are designed that with the belt on the cam gears you will never reach a point that all the valves are closed, so of course you're going to hear air leaking into the cylinder. What did your compression test read? Leakdown test?
Click to expand...
185-180-165-190. I didn't do leakdown test that I really want to do to see if pistons or valves are in danger.

If there's a point that both intake and exhaust valves are opened, boost leak test will leak to exhaust pipe.. so that's cool. however, mine 's test result in boost leak is that air trapped in valve cover. Like if I plug the pcv valve and exhaust recirculate port (to intake) and run boost leak test, then I open the oil cap, air pressure will be released from oil cap... so crank case is collecting pressure... of course, I shouldn't plug those ports. I found it after 100 times of differnt trial.

so it comes down to piston ring leaks or valve seal leaks.... 2 possibilities.

I believe these leaks contribute to weak combustion power, to spool my 50 trim .
 
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#11 ·
Do a leakdown test, check your timing(cams and ignition), and check to see if you're pushing coolant. I can't remember how long you're supposed to let the cylinders leakdown, anyone else?
 
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