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Leak Down Tester Question

Started by Greg Kimble , 04-30-2011 05:27 PM

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5 replies to this topic

#1
Greg Kimble

Posted 04-30-2011 05:27 PM

Improving Member

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137 posts

Location:Florida
Region:Central Florida
Car Year:1999
Car Number:9

Purchased a longacre leak down tester and was trying to use it today, and am not sure I am doing this right. I seem to be getting a lot of air leakage the spark plug hole on the hose. The hose is flexible and I have twisted on it as much as I can but it still seems to leak. Somewhere after 70 psi you can hear a litte "pop" sound and then I can hear air escaping. I was able to get a reading on two of the cylinders (at 100 psi) one read 5% and the other read 20% (this one shows lower compression too). Am I doing something wrong?

Greg

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#2
Gatoratty

Posted 04-30-2011 05:54 PM

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Location:Orlando
Region:Central Florida
Car Year:1992
Car Number:3

Buy a compression extension tool. Sears carries them. They are for oHV heads and Hemi heads. Then just attach your flexible hose to the extension and you can tighten the hose so it doesn't leak.

Paul McLester
SM #3

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#3
Andrew Charbonneau

Posted 04-30-2011 06:20 PM

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Location:delray biatch florida
Region:83
Car Year:1967
Car Number:67

who is your engine bulider you air that you might be hearing could be alot of power :lol:

Satire is primarily a literary genre or form, although in practice it can also be found in the graphic and performing arts. In satire, vices, follies, abuses, and shortcomings are held up to ridicule, ideally with the intent of shaming individuals, and society itself, into improvement.^[1] Although satire is usually meant to be funny, its greater purpose is often constructive social criticism, using wit as a weapon.

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#4
dstevens

Posted 04-30-2011 06:45 PM

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Location:Vegas
Region:LVR

Buy a compression extension tool. Sears carries them. They are for oHV heads and Hemi heads. Then just attach your flexible hose to the extension and you can tighten the hose so it doesn't leak.

Good idea, I haven't done a leak down on an OHV. I couldn't find one at Sears but I found something on eBay. It replaces the final flex hose completely.

http://cgi.ebay.com/...n-/260749738226

On edit: Here's one on the Sears site. I was looking for Craftsman and sold by Sears though this would do the trick.

http://www.sears.com...5_SPM201564117P

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#5
Bench Racer

Posted 05-01-2011 05:38 AM

Different strokes for different folks : )

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Location:Wauwatosa, WI
Region:Milwaukee
Car Year:1990
Car Number:14

Do you have an o-ring on the part that screws into the spark plug hole? With an o-ring you shouldn't need to super tight the unit into the threaded hole.