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Topic: leak-down test...
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PeNiNsula302
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Member # 1061
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posted
 
 
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?
Posts: 3423 | Registered: Mar 2002
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93PONY
Mr. Valve Events
Member # 60
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posted
Why pay $60 an hour when the tool is $100?
Granted you need an air compressor, but everybody know's someone with a compressor.
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www.advancedenginedevelopment.com
SCT dealer
Dynotuning
(916)715-7569
Posts: 4266 | From: Fair Oaks, CA | Registered: Nov 2000
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PeNiNsula302
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Member # 1061
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posted
well i guess im not to familiar with the process of the test, would you mind briefly explaining??
Posts: 3423 | Registered: Mar 2002
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93PONY
Mr. Valve Events
Member # 60
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posted
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.
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www.advancedenginedevelopment.com
SCT dealer
Dynotuning
(916)715-7569
Posts: 4266 | From: Fair Oaks, CA | Registered: Nov 2000
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AaronC
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Member # 86
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posted
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.
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1991 GT Convertible: Stock 157k mile shortblock, HiTech cam, AFR 165 heads, Edelbrock RPM intake, 1 3/4 headers
12.23 at 112.99
Best MPH 113.97
Posts: 776 | From: woodland | Registered: Dec 2000
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PeNiNsula302
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Member # 1061
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posted
sounds good, thanks fellas! looks like im gonna buy the thing instead of paying some insane rate at a shop...
Posts: 3423 | Registered: Mar 2002
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Fox89GT
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Member # 1539
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posted
AaronC, how does the tool know where its leaking from? The leak can be anywhere? Just wondering...
Posts: 40 | Registered: Jul 2002
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Gear Head
JARED
Member # 779
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posted
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.
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Support our troops!
Posts: 5685 | From: EASTBAY | Registered: Jan 2002
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93PONY
Mr. Valve Events
Member # 60
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posted
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!
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www.advancedenginedevelopment.com
SCT dealer
Dynotuning
(916)715-7569
Posts: 4266 | From: Fair Oaks, CA | Registered: Nov 2000
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AaronC
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Member # 86
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posted
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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1991 GT Convertible: Stock 157k mile shortblock, HiTech cam, AFR 165 heads, Edelbrock RPM intake, 1 3/4 headers
12.23 at 112.99
Best MPH 113.97
Posts: 776 | From: woodland | Registered: Dec 2000
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