buying my dads 5th gen off him but needs work

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Mon Apr 06, 2015 4:07 pm

Would be worth checking the compression. That kind of carbon deposits inside the head can be the result of combustion gas blowing by worn piston rings.
Not something that H22's are known for, but if any engine has had long stints between oil changes, the bores and rings will wear...

benthebratt · Post by **benthebratt** » Mon Apr 06, 2015 8:33 pm

What sort of compression we looking for so I know when I test it

benthebratt · Post by **benthebratt** » Mon Apr 06, 2015 8:50 pm

And shall I flush the engine as that carbon build up really frustrating me

benthebratt · Post by **benthebratt** » Sun May 17, 2015 1:26 pm

Still can't find problem to windows both window don't go down stopped at same time.... Sunroof still works.. What's everything I can check.. Cheers

benthebratt · Post by **benthebratt** » Thu Apr 21, 2016 11:23 am

just been looking through my old posts, even after all those carbon deposits and low oil, the comp0ression on the lude is 210 in all cylinders and is producing 209bhp . I heard that these engines are strong but didn't realise how strong they actually are!

Post by **Merlin** » Thu Apr 21, 2016 1:12 pm

That sounds nice and healthy. The compression result doest matter that much but it is important that the compression is roughly equal across all cylinders. For comparison I got around 175 psi across the board on the engine I just fooked. That may seem low but differences in engines and compression testers will give differing results.

If you are worried about the gunk I'd do this a few times.

mercutio wrote:oil change and engine flush or buy the cheapest oil and change it run it around then change it again then run it around and change it again for decent oil