leakdown test?
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From: RAIDER NATION, CA, USA
leakdown test?
exactly how will a leakdown test help me figure out whats wrong with my car?
i have a problem with white smoke blowing out of my exhaust during low rpms after long drives and sometimes during regular street driving. i raced my car the other day and started blowin white smoke during idle. after a while, it went away.
i did a compression test. no signs of a leaky headgasket. i cant seem to figure it out!
i have a problem with white smoke blowing out of my exhaust during low rpms after long drives and sometimes during regular street driving. i raced my car the other day and started blowin white smoke during idle. after a while, it went away.
i did a compression test. no signs of a leaky headgasket. i cant seem to figure it out!
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From: Severn, MD
Re: leakdown test? (SIK IN DA HED)
If you examine the combustion space, what components are there that aid in providing a seal....valves and rings, right. So when you do a leakdown test, you are checking to see if the pressurized air is escaping past the rings or valves. If you take off the oil cap and listen to the intake, exhaust, and valve cover, you will be able to indentify the source of the leak.
Using an input pressure of 100psi, you should not see more than 2-3% leakage with 5% being the service limit.
Using an input pressure of 100psi, you should not see more than 2-3% leakage with 5% being the service limit.
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From: Cincinnati,, Oh
Re: leakdown test? (EE_Chris)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EE_Chris »</TD></TR><TR><TD CLASS="quote">If you examine the combustion space, what components are there that aid in providing a seal....valves and rings, right. So when you do a leakdown test, you are checking to see if the pressurized air is escaping past the rings or valves. If you take off the oil cap and listen to the intake, exhaust, and valve cover, you will be able to indentify the source of the leak.
</TD></TR></TABLE>
If you pull off the radiator cap and antifreeze is getting pushed out, usually indicates a blown head gasket.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EE_Chris »</TD></TR><TR><TD CLASS="quote">
Using an input pressure of 100psi, you should not see more than 2-3% leakage with 5% being the service limit.</TD></TR></TABLE>
I always though it was 10%
</TD></TR></TABLE>
If you pull off the radiator cap and antifreeze is getting pushed out, usually indicates a blown head gasket.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EE_Chris »</TD></TR><TR><TD CLASS="quote">
Using an input pressure of 100psi, you should not see more than 2-3% leakage with 5% being the service limit.</TD></TR></TABLE>
I always though it was 10%
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Joined: Apr 2002
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From: Cincinnati,, Oh
Re: leakdown test? (xcellorator)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xcellorator »</TD></TR><TR><TD CLASS="quote">if a motor passes a compression test is it necessary to do a leakdown test?</TD></TR></TABLE>
A leakdown test will show leaks that wont show up on a compression test. A headgasket with a slight leak is a good example.
A leakdown test will show leaks that wont show up on a compression test. A headgasket with a slight leak is a good example.
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