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97 eclipse

JeffGS-T97

Supporting Member
1,015
714
Mar 22, 2019
Muncie, Indiana
Maybe my more aggressive cams have a bit of extra overlap causing a small leak not really sure. Last time i tested it was with the head pulled and the cams out but valves and seals in and it didn't leak a bit.
 

DSMPT

DSM Wiseman
2,050
1,610
Jun 12, 2014
Japan / Mexico, Arizona
Did a BLT directly at the TB elbow just to see if there were any leaks while the turbo was out. Depending on cam orientation im getting air leaks from the exhaust ports. At TDC the air comes out of cylinder 4 exhaust valves. Not a bunch but a little. I think i may have something wrong going on, getting the turbo rebuilt only to run into this its disheartening. Didn't leak before the HG change with it out and the cams removed, O we
If you meant at TDC w/ cams being lined up, that's normal. #1 is in compression stroke, both in/ex valves are closed. but #4 is in exhaust stroke and going to intake stroke. Which means both in/ex valves may open slightly. If the valves seal well, the air should come out only from #4 exhaust port. Shouldn't come out from #1/2/3.
 

JeffGS-T97

Supporting Member
1,015
714
Mar 22, 2019
Muncie, Indiana
If you meant at TDC w/ cams being lined up, that's normal. #1 is in compression stroke, both in/ex valves are closed. but #4 is in exhaust stroke and going to intake stroke. Which means both in/ex valves may open slightly. If the valves seal well, the air should come out only from #4 exhaust port. Shouldn't come out from #1/2/3.
This helps a ton thank you. Since #4 is on the passanger side and that's where the slight leak is I suppose it's ok.
 

DSMPT

DSM Wiseman
2,050
1,610
Jun 12, 2014
Japan / Mexico, Arizona
If you like, try to rotate the crank 180 degree (90 degree at cam dowel pin), the air should stop coming out from #4 port and come out from #2 instead.
If rotate the crank 360 degree (180 degree at cam dowel pin) the air should come out from #1.
If rotate the crank 540 degree (270 degree at cam dowel pin), the air should come out from #3.
 

JeffGS-T97

Supporting Member
1,015
714
Mar 22, 2019
Muncie, Indiana
Hoping to get things going again I had some health issues set me back but hoping to start plugging away. Im being very patient with the turbo stuff I haven't felt much like wrenching either I will post updates for sure thank you for asking.
 
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