Compression tester

scotty · Post by **scotty** » Wed Apr 25, 2007 12:08 pm

Can anyone advise where I can get a good cylinder compression tester ? I am looking for a good quality one that gives accurate readings.

Cheers

r550s · Post by **r550s** » Wed Apr 25, 2007 8:36 pm

screwfix do one that seems to be the same as the one I use - it screws in instead of using just a rubber bung like the (cheaper) gunsons one from halfords. Plus, it's got sufficient reach.

bigblackfalco · Post by **bigblackfalco** » Wed Apr 25, 2007 8:49 pm

i've got draper unit:
http://www.abbeypowertools.co.uk/subpro ... 01407.aspx
Can't remember the thread size on the BMW but you can get adapters.
Bailey.

scotty · Post by **scotty** » Thu Apr 26, 2007 11:56 am

Thanks folk's

I'll follow that up. I reckon doing an annual compression is as good a indicator as any to monitor the wear of the engine.

r550s · Post by **r550s** » Thu Apr 26, 2007 9:14 pm

Don't forget to hold the throttle open when you test the compression - otherwise you could get a disappointingly low result, and end up regrinding valves and replacing piston rings etc. Course, I'd never make that mistake...