Help me interpret these results.
Thread Starter
TECH Apprentice
Joined: Apr 2002
Posts: 308
Likes: 0
From: Austin, TX
Help me interpret these results. Help me interpret these results.
Background: my motor seems to have quite a bit of blowby at idle and I get smoke out the breathers (PCV system removed).
The car still seems to run pretty darn good. I did a leakdown and compression test and here are the results. It looks like #3 may have a problem. What do you guys think?
Background: my motor seems to have quite a bit of blowby at idle and I get smoke out the breathers (PCV system removed).
The car still seems to run pretty darn good. I did a leakdown and compression test and here are the results. It looks like #3 may have a problem. What do you guys think?
That is at the top of the spec not entirely bad.
You gonna have a little blow-by specially w/o the PCV.
Is it real bad? Is it misting the area around the breather with oil?
Was the motor warmed for the tests?
You gonna have a little blow-by specially w/o the PCV.
Is it real bad? Is it misting the area around the breather with oil?
Was the motor warmed for the tests?
Thread Starter
TECH Apprentice
Joined: Apr 2002
Posts: 308
Likes: 0
From: Austin, TX
Originally Posted by wrencher
That is at the top of the spec not entirely bad.
You gonna have a little blow-by specially w/o the PCV.
Is it real bad? Is it misting the area around the breather with oil?
Was the motor warmed for the tests?
You gonna have a little blow-by specially w/o the PCV.
Is it real bad? Is it misting the area around the breather with oil?
Was the motor warmed for the tests?
The motor was not warm for the test (I tried, but it was just too hard). Does a warm engine usually read better or worse?
#3 sure sounded different then the others. The others were pretty much silent, but you could hear air moving in #3. It almost sounded like it was going into the intake. I'm sure it was at TDC. Just to be sure, I'm going to pull the intake next and see if the air is going out the intake runner.
I'm probably going to get a new shortblock very soon anyway. I'm wondering if I'll be risking damage to my heads... if I really push this one hard in the meantime. I'm thinking about doing a little experimentation and turning up the boost a bit.
Last edited by QuickSilver2002; Jan 3, 2004 at 06:05 PM.
Originally Posted by QuickSilver2002
I'm thinking about doing a little experimentation and turning up the boost a bit.
That right there is gonna cause blow-by to increase .
Is this a stock short block?
Heard a ton of these same stories from F/IND guy's running stock short blocks.
You can damage heads if something goes boom
The test will improve the #'s w/ a warmed motor.
But I think your getting blow by w/your set-up no matter what.
