Compression tester recommendation

Hopefully a modestly priced one that I can use straight away on my Moby 50V.

Re: Compression tester recommendation

Re: Compression tester recommendation

Captain Janeway /

https://www.amazon.com/dp/B01NAGRKJ4/

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Re: Compression tester recommendation

♣Slew Foot♣ /

Macgyvering involves taking off the head putting in a tire stem and using air pressure gauge that goes up and then halts and shows where it was you do two or three strokes and pull it off and it will show you roughly what it is but you can always just stick your pinky in it if you think you're losing compression like that chances are it's an air leak either in a seal or a gasket do a leak down test he'll probably tell you more if you think it's worn rings you just put a pencil eraser and 1st in there and see if you could wiggle the Piston around if you can you need new rings

Re: Compression tester recommendation

Rings are designed to float in the piston ring grooves so slight movement in the piston would be normal, not a sign of ring wear. The piston to bore clearance is only 0,010-0,015mm, so if it was significant movement it would be the wrong piston in the bore.

> ♣Slew Foot♣ Wrote:

> -------------------------------------------------------

> more if you think it's worn rings you just put a pencil eraser and 1st

> in there and see if you could wiggle the Piston around if you can you

> need new rings

Re: Compression tester recommendation

Craftsman make a good one that will last for years. Mine was my father's from the 70s and is still going.

Re: Compression tester recommendation

> Jeff Parr Wrote:

> -------------------------------------------------------

> Craftsman make a good one that will last for years. Mine was my father's

> from the 70s and is still going.

they use to make good stuff, now their stuff is no different than harbor freight, except pricier. you are right though, vintage Craftsman is bulletproof, but anything replaced under warranty will be new chinese stuff

Re: Compression tester recommendation

Rob LaFreniere /

I bought the same Innova tester (3612) from amazon. It said my compression was slightly under 90, but the ped started and ran fine so I didn't trust it.

To confirm my suspicion that it was junk, i bought this one which indicated 110 psi. which made more sense.

Mityvac 5530:

https://www.amazon.com/dp/B0002WSC0G/

Re: Compression tester recommendation

Autozone will let you take theirs for free with just a deposit. Works fine.

Re: Compression tester recommendation

Captain Janeway /

> Mike L Wrote:

> -------------------------------------------------------

> > Jeff Parr Wrote:

>

> > -------------------------------------------------------

>

> > Craftsman make a good one that will last for years. Mine was my

> father's

>

> > from the 70s and is still going.

>

> they use to make good stuff, now their stuff is no different than harbor

> freight, except pricier. you are right though, vintage Craftsman is

> bulletproof, but anything replaced under warranty will be new chinese

> stuff

Yep. Craftsman stuff isn't what it used to be.

Re: Compression tester recommendation

I’ve got the harbor freight one. I wouldn’t recommend it. Seems to read consistent but way low. Maybe I should try and calibrate it somehow....

Re: Compression tester recommendation

> Thomas TPRF Wrote:

> -------------------------------------------------------

> I’ve got the harbor freight one. I wouldn’t recommend it. Seems to read

> consistent but way low. Maybe I should try and calibrate it somehow....

Bring it back and trade it for a different one .

Or , if you know how low ( by comparison ) , just add that to your reading .

Re: Compression tester recommendation

Joe Schuitema /

I second the mityvac 5530. All the attachments you need and built well.

https://www.amazon.com/dp/B0002WSC0G/

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