Compression testing
Moderators: User administrators, Moderators
The Wiki knows!
Yup, 150+
Although there is no 'God given' figure, just depends how well it's all been broken in. 150 about minimum for a new engine, would like to see 175 + myself.
8 bar is minimum according to Bentley
Yup, 150+
Although there is no 'God given' figure, just depends how well it's all been broken in. 150 about minimum for a new engine, would like to see 175 + myself.
8 bar is minimum according to Bentley
The 80-90 Tech Wikipedia Your 1st port of call

Syncro Kastenwagen / 16" Kombi Camper
Syncronaut No. 1
- sezicoolcat
- Registered user
- Posts: 586
- Joined: 24 Apr 2008, 16:42
- 80-90 Mem No: 5198
- Location: Chatham, Kent
- Contact:
Ok, will be doing the ol' compression test sometime soon and be publishing my results(rain stopping me at present).
I am parked on a hill.
Can I do the test on a hill? (I wouldn't have thought that it mattered at all, but whats the technical consensus?) There again, the wet test might be a tad difficult I should imagine.
Sarah
I am parked on a hill.
Can I do the test on a hill? (I wouldn't have thought that it mattered at all, but whats the technical consensus?) There again, the wet test might be a tad difficult I should imagine.
Sarah
If you've gotta go, you've gotta go. (Camping that is
)

- VWCamperfan
- Registered user
- Posts: 993
- Joined: 08 Jul 2007, 19:47
- 80-90 Mem No: 4000
- Location: Sheerness, Kent.
Afternoon!
Taking readings on a hill won't make any difference but don't expect a wet test to work with these engines. The idea of a wet test is to provide an oil seal between the piston rings and the cylinder walls but with a flat 4 engine the oil just sits in the bottom of the cylinder and doesn't seal any more than the bottom inch or so of the rings. Great on an in-line engine, not so great on these!
Ps. I'll try to get over sometime to have a looksie. If you're free this Saturday I could pop over as i'm not doing much then. (Busy Sunday mind, so need to get it all running perfectly by then!)
Taking readings on a hill won't make any difference but don't expect a wet test to work with these engines. The idea of a wet test is to provide an oil seal between the piston rings and the cylinder walls but with a flat 4 engine the oil just sits in the bottom of the cylinder and doesn't seal any more than the bottom inch or so of the rings. Great on an in-line engine, not so great on these!
Ps. I'll try to get over sometime to have a looksie. If you're free this Saturday I could pop over as i'm not doing much then. (Busy Sunday mind, so need to get it all running perfectly by then!)
Mark.
I'm Not A Complete Idiot... Some Bits Are Missing!
1.6 Modified CT engine.
I'm Not A Complete Idiot... Some Bits Are Missing!
1.6 Modified CT engine.
- sezicoolcat
- Registered user
- Posts: 586
- Joined: 24 Apr 2008, 16:42
- 80-90 Mem No: 5198
- Location: Chatham, Kent
- Contact: