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Old 06-04-2015, 02:19 PM
J-Mech J-Mech is offline
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Join Date: Apr 2013
Location: Oblong, Illinois
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Quote:
Originally Posted by DeltaCub View Post
I disagree about leak down tests. Kohler and Briggs STRONGLY recommended leak down tests to check the integrity of the valves, cylinder and rings. Many small engines have a variation of an automatic compression release. This is done, for instance, by an Automatic Compression Release or ACR in Kohler "K" series during cranking. Others used a method of bumping the exhaust valve to release some compression. The latter method is not used any more due to enviromental concerns (Tier 1 or Tier2). The intake valve is now bumped during cranking. But that is another discussion. Leak down tests give a good overall picture of the integrity of the engine.
I'm sure Kohler and Briggs do recommend it. So does anyone else who makes engines. Ford, GM, even Jasper Engines want you to do leak down tests. Big hairy deal. I can't hear well enough to hear where the air is escaping, and a leak down test only proves a leak. A compression test will reveal that. I'm not going to debate the issue anymore. They are a waste of time.

The Kohler K series ACR DOES hold or "bump" the exhaust valve open.


Quote:
Originally Posted by bocephus1991 View Post
Yeah meant vertical, been working a lot to Jon! Think everyone's tired and worn out. Thanks for your input. I read somewhere else that the Briggs ohv engines are bad about blowing head gaskets between push rods and cylinder. Thanks again Jon !
Your welcome!
I'm beat Bryan. Been doing like 14-18hr days for about 2 weeks.
Briggs isn't the only OHV that does it. The Kohlers do too.
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