im not to sure how to do a leak down test on my motor does any one know how to explain how to do a leakdown test??? help please.

 

you need a special gauge that hooks up to an air compressor. what it does is puts compressed air in your cylinder thru your sparkplug hole, and measures the leak. The leakdown tester is something you'd have to get through Snap-on or a comparable tool company, I dont think you can get it at your local auto care store.

 

thanks, sounds simple enough,when checking
each piston does it have to be at tdc or bdc?

 

"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"
-USDM 4G VTEC

 

thanks thats what i was not knowen.