What size compression tester ?
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- Forename: Chris
- Surname: S
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What size compression tester ?
Someone asked me the other day what the compression is like on my B engine. Whilst believing it should be good as it has only done a few hundred miles since a full and thorough rebuild it would be good to actually check. Basic compression testers arent expensive so it would probably make sense to buy one rather than borrow. Would anything that includes a 14mm adapter do the job or does the B engine require a special spark plug thread type that today's units might not cater for ??
1979 MGB GT
2003 MG TF
2003 MG TF
Re: What size compression tester ?
Chris,. I have an ancient one which simply has a hard rubber cone to push into the spark plug hole. This has always worked very well for me, needs 2 people of course, but is universal.
Ian F
Ian F
MGCC member
1972 BGT, Blaze, Navy trim, recessed grill
1961 Midget, 948cc, Clipper Blue, Blue trim and weather gear
1972 BGT, Blaze, Navy trim, recessed grill
1961 Midget, 948cc, Clipper Blue, Blue trim and weather gear
- Tom Brearley
- Posts: 120
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- Forename: Tom
- Surname: Brearley
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- Location: Devon
Re: What size compression tester ?
The Gunson version fits and can be used without an assistant, as it screws into the plug hole.
https://www.ebay.co.uk/itm/362876807629 ... MQQAvD_BwE
John Twist says that if the difference between cylinders is within 10%, all is well.
https://www.ebay.co.uk/itm/362876807629 ... MQQAvD_BwE
John Twist says that if the difference between cylinders is within 10%, all is well.
1973 MGB GT
Mallard Green / Autumn Leaf
Mallard Green / Autumn Leaf
Re: What size compression tester ?
The B-series engine uses standard 14mm plugs, so any compression tester should be fine. I have the Gunsons one that Tom mentioned.
Mike
1969 MGB GTV8 3.9 Conversion. Many classics have passed through my hands but the faithful BGT V8 is the last man standing.
1969 MGB GTV8 3.9 Conversion. Many classics have passed through my hands but the faithful BGT V8 is the last man standing.
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- Posts: 237
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- Forename: Chris
- Surname: S
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- Joined: Mon Oct 25, 2021 6:04 pm
- Forename: Richard
- Surname: Browne
Re: What size compression tester ?
Compression testers scare me… I may not want to know what the results tell me!
I have the 14mm colourtune and that fits perfectly.
I have the 14mm colourtune and that fits perfectly.