JDM motor questions
10-11-2011, 11:52 AM
#1
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JDM motor questions
hello all,
anyone's got issues with leakdown test on a jdm motor? the test is done before actual install. 20% leak in 3 of the 4 cylinders for me....
bad motor? or just the fact that the motor has been sitting?
thanks.
anyone's got issues with leakdown test on a jdm motor? the test is done before actual install. 20% leak in 3 of the 4 cylinders for me....
bad motor? or just the fact that the motor has been sitting?
thanks.
10-11-2011, 12:09 PM
#3
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I bought mine from a member. Did the leakdown test. Numbers came back as if the motor was off the Subaru assembly line. So I put it in.
Not like it matters, but what version did you get? sounds like a good excuse to go built!
Not like it matters, but what version did you get? sounds like a good excuse to go built!
10-11-2011, 02:56 PM
#5
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btw, here are the test results (done dry)
Cylinder 1: 20% leak
Cylinder 2: 60% leak
Cylinder 3: 20% leak
Cylinder 4: 20% leak
sparkplugs are clean
Cylinder 1: 20% leak
Cylinder 2: 60% leak
Cylinder 3: 20% leak
Cylinder 4: 20% leak
sparkplugs are clean
Last edited by chochocho; 10-11-2011 at 03:14 PM.
10-11-2011, 03:14 PM
#6
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well if its been sitting a while and you cranked it over by hand with no oil pressure its going to have more blow-by through the rings. Still though thats pretty low 
10-11-2011, 03:35 PM
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Ya....
What year and motor?
EJ20G/K/207/Etc?
Sounds like a good time to freshen the motor up to me. It would be easier to freshen it up and ensure everything is new/in working order prior to installing the motor only to take it back out again.
What year and motor?
EJ20G/K/207/Etc?
Sounds like a good time to freshen the motor up to me. It would be easier to freshen it up and ensure everything is new/in working order prior to installing the motor only to take it back out again.
10-11-2011, 03:37 PM
#8
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it's a sti v8 motor so i think these are 2004-2005 motors.
maybe freshening up the motor is the way to go. but i still have the warranty with the supplier on return so we'll see.
maybe freshening up the motor is the way to go. but i still have the warranty with the supplier on return so we'll see.
Last edited by chochocho; 10-12-2011 at 09:24 AM.
10-11-2011, 03:49 PM
#9
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) Since you still have a warranty then I'd have a shop do the compression/leak down test to have documentation rather than your own word if you did it yourself. Once you have that documentation contact the motor supplier and see what they say about a replacement. Worst comes to worst if you need to freshen it up there's always 2 great choices to go through...DBTuned or LIC 
10-11-2011, 07:45 PM
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the importer is very confident that the motor is good and he really wants to see that i install the engine first and get it up and running.
of course, if it's bad, i am really s.o.l. i'll still have time for the warranty but i'd lose on all the labor to install and remove.....and possibly reinstall another one.
any suggestion on the leakdown test? does it indicate that i've got a bad block?
of course, if it's bad, i am really s.o.l. i'll still have time for the warranty but i'd lose on all the labor to install and remove.....and possibly reinstall another one.
any suggestion on the leakdown test? does it indicate that i've got a bad block?
Last edited by chochocho; 10-11-2011 at 08:18 PM.
10-11-2011, 10:07 PM
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From every shop I've talked to (I went through the same thing) you can't really get a proper leak down or compression test unless the motor's been fully lubricated and run.
My motor had ~15 psi on one side and ~30 and turned out to be fine.
My motor had ~15 psi on one side and ~30 and turned out to be fine.
10-11-2011, 11:30 PM
#12
Where was the leakage going? Past ringlands or valve? Was the motor ever exposed to a lot of moisture or possibly hosed down? It might be a good idea to put a boroscope in there and look at the cylinder walls. I've seen people wash their motors and rust out the cylinder walls.
The 20% wouldn't worry me as much, but the 60% is definately cause for concern.
-- Ed
The 20% wouldn't worry me as much, but the 60% is definately cause for concern.
-- Ed
10-12-2011, 08:45 AM
#13
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the importer is very confident that the motor is good and he really wants to see that i install the engine first and get it up and running.
of course, if it's bad, i am really s.o.l. i'll still have time for the warranty but i'd lose on all the labor to install and remove.....and possibly reinstall another one.
any suggestion on the leakdown test? does it indicate that i've got a bad block?
of course, if it's bad, i am really s.o.l. i'll still have time for the warranty but i'd lose on all the labor to install and remove.....and possibly reinstall another one.
any suggestion on the leakdown test? does it indicate that i've got a bad block?
where did you get it from BTW? Also 02-03 should be the V7s, and 04-05 are the V8s. The V8 has no TGVs, better cams, and the twin-scroll turbo/headers. Does yours have TGVs?
10-12-2011, 09:12 AM
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10-12-2011, 09:18 AM
#15
I wouldn't install that thing with that test result. Have our favorite shop take a good look or return it. Why take the risk when your replacement engine should be in working order. 60% is not working condition in my book.