This is topic leak-down test... in forum Tech Talk at Northern California Ford Owners .
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Posted by PeNiNsula302 (Member # 1061) on
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How much should i expect to pay to get one of these done and how long do they usually take?? Will mostly any automotive shop do it?
Posted by 93PONY (Member # 60) on
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Why pay $60 an hour when the tool is $100?
Granted you need an air compressor, but everybody know's someone with a compressor.
Posted by PeNiNsula302 (Member # 1061) on
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well i guess im not to familiar with the process of the test, would you mind briefly explaining??
Posted by PeNiNsula302 (Member # 1061) on
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ttt...
Posted by 93PONY (Member # 60) on
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Summit sells a leak-down tester for ~$100...comes with detailed instructions.
Very simple. Basically a fancy compression tester that tells you if your cylinders are sealing properly.
Blows compressed air into the cylinder & measures the % of leak.
Posted by AaronC (Member # 86) on
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I have a leak down tester. You need an air compressor to use it. Basically you pull the spark plugs out and make sure both valves are shut for the cylinder your testing. then attach the the line from the tester to the spark plug hole. Attach the other end to the air compressor and slowly give it 100 psi of air. The air will compress into the cylinder. The tester has 2 gauges. The first one you set to 100 and the second gauge will tell you how much is leaking down. so if the second gauge reads 90 then you have 10% leak down. It's a good tool because it'll tell you where it's leaking from. Intake valve, exhaust valve, head gasket etc.
Posted by PeNiNsula302 (Member # 1061) on
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sounds good, thanks fellas! looks like im gonna buy the thing instead of paying some insane rate at a shop...
Posted by Fox89GT (Member # 1539) on
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AaronC, how does the tool know where its leaking from? The leak can be anywhere? Just wondering...
Posted by sic91sleeper (Member # 779) on
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quote:
Originally posted by Fox89GT:
AaronC, how does the tool know where its leaking from? The leak can be anywhere? Just wondering...
Your right. I need to do this on my motor.
Posted by 93PONY (Member # 60) on
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That's were a good ear comes in. You've got to listen for the air leaks.
If it's coming from the intake, it's probably a leaky intake valve, exhaust, exhaust valve. Oil pan, blow by from the rings. Radiator......head gasket!
Posted by AaronC (Member # 86) on
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Exactly what Shaun said. Or in my case I blew my head gaskets between the cylinders and you could hear and feel the air coming out of the next cylinders spark plug hole. A compression test wouldn't have done much. I knew I wasn't getting compression, but with this test, I knew exactly why. Then I knew what needed to be done.
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