Purchasing a compression gauge

[cowboyup3371]

If I wanted to buy my own compression gauge, what do I need to look for as far as size requirements, quality, etc? Can I pick up this one from Harbor Freight (http://www.harborfreight.com/quick-connect-compression-tester-95187.html) or will this one from Sears (http://www.sears.com/craftsman-comp...47089000P?prdNo=1&blockNo=1&blockType=G1#desc) work better and last longer?

 

[JEEPRUSTY]

Legend has it that leakdown testing can isolate the contributing factor of compression loss.

This gauge clains to be able to do that which is a bit of a boast.

 

[mike_of_bbg]

Just based on the user reviews, I'd say the Craftsman one is a lot better. Also comes with an additional size adapter so should be a bit more universal if you want to test a lawnmower or whatever

You having issues?

 

[cowboyup3371]

Just based on the user reviews, I'd say the Craftsman one is a lot better. Also comes with an additional size adapter so should be a bit more universal if you want to test a lawnmower or whatever

You having issues?

No but my plans for this maintenance cycle will be to tear down the engine and replace a leaking base gasket. I'd like to know what the compression is before I start and what it is afterwards.

 

[tkent02]

The harbor fright one is fine. Accurate enough for our purposes, I can't see a difference in readings between it and the expensive one. It will last a lifetime of the occasional use we might use it for. For a professional mechanic, no way but for guys like us it's fine.