HF leak down tester

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my5thmopar

my5thmopar

Life Long MOPAR Owner
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I need to get a cylinder leak down tester. I didn't see one in the tool loan program at O, AA or AZ. Wonder if anybody has the HF tester and does it work OK? Thanks
 
I just made my leak down tester. Get an old spark plug that fits your engine and beat out the insulator so all you have is the steel part of the plug with center open. Get a short piece of 1/4" pipe threaded on one end and weld it to the plug. From there you can use a tee then put a pressure gauge on one side and ball valve on the other then connect air hose to other side of the ball valve. You can configure it how ever you need to so that it's user friendly
 
I bought on of the HF units and it wasn't accurate at all. Had it on sale and I had a 20% off coupon so it was real cheap so I should have known. The problem was the gauges were junk. I have a tool store near me that gets closeout deals on all sorts of stuff and they had good quality gauges for $5 each and before I installed them I tested each and both read within 1 psi of each other at 100 psi so I installed them and it's accurate now.
 
I may try one for the wifes CRV, can't get rid of a misfire code and they are known to have valve seat problems. I don't really need to know what the percentage is as much as varience.
 
EL5DEMON340 said:
I may try one for the wifes CRV, can't get rid of a misfire code and they are known to have valve seat problems. I don't really need to know what the percentage is as much as varience.
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I would say you have a burnt exhaust valve for sure. If you drive it that way the next thing to go will be your catalytic convertor from all the unburnt fuel going out the exhaust. Just finished doing a valve job on my daughters crv it had a burnt exhaust valve. The valve lash is .006 to .008 on the exhaust and before tearing it down I couldn't get a .003 feeler gauge between them.
And I used my shop made leak down tester to find the problem cylinder
 
I remove the gauge and shrader valve from my compression tester kit and screw on an air hose QD. Set the regulator to 100 psi and listen for leakage; it can only leak into the crank case, intake manifold or exhaust manifold, or cooling system. A proper compression test will let you know if the rings are shot.
 
mderoy340 said:
I remove the gauge and shrader valve from my compression tester kit and screw on an air hose QD. Set the regulator to 100 psi and listen for leakage; it can only leak into the crank case, intake manifold or exhaust manifold, or cooling system. A proper compression test will let you know if the rings are shot.
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If you added a .040 orifice you'd HAVE a LD tester
 
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