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How do i do a leakdown test

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Old 04-15-2004, 03:57 AM
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Default How do i do a leakdown test

my exhaust is blowing out white smoke, some people told me it could be my headgasket but it doesnt have sweet smell to it at all, people say its my valves or im running to rich, burning oil??? im not sure how to do a leakdown and compression test.
Old 04-15-2004, 05:34 AM
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Default Re: How do i do a leakdown test (Layziebtnh055)

Compression test:

need a compression gauge...
take a spark plug off, place the gauge, disconect the dizzy and the tower plug of the harness on the driver side
go inside the car and get ready to crank the engine
make sure u got the gas floored completely @ WOT
crank the engine at least 4-5 times to allow compression to build
go out and read the reading on the gauge

Leakdown test
need a compressor
need the leakdown test tool and gauge
u need to make sure the engine is on TDC
then u put compressed air into the CYL #1 and once u get over 100psi in there, start to listen if u hear any leaks ( u can also do #3 before u move engine)
if u hear a leak on ur intake u have some bent valves or bad vlave seats
if u hear the leak on ur exhaust, u have bad exhaust valves or seats
if u hear the leak inside ur engine(thru oil cap) then u have bad rings
turn engine until TDC of Cyl #2 and repeat process
i am kinda in a hurry so this shall give u an idea
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