Hey guys,

I own a 2007 model BF Mk2, my engine compression is 220psi across the block. I would like to know if there is anyone else out there that has had any issues with high compression and what they have done to fix it.

if you have a BF model and have done a compression test, what was it I would like to know?

Cheers from Campbell

Could be and the only way I see you having a high comp is if the gauge is giving you a false reading or variable cam timing has retarded to much. In saying that I don't know how the cams are actuated. I have only been told they vary with use of oil pressure

Must add this is a turboed engine also.

I have changed the VCT sprockets and the solenoids and this did not alter the compression, the gauge has been tested, and the static timing has been checked.

Quite high I think for a turbo motor, but just wanting to know if anyone else has had theirs looked at

Cheers,

Edited 12/07/13 06:03 AM12/07/13 06:03 AM by campbell8

Take your intake off your throttle body and try again. If your cranking for a while it might make a 1psi of boost. You only need to crank three times. Like rrrrrrr, rrrrrrr, rrrrrrrr. Lol bad example I guess.

LOL, I have removed the intake and done that test as I was told by someone else to do that, same numbers...

Cheers mate

Have you got your foot flat on the accelerator when cranking? Some people do and some don't. If you are that will definatly change pressures, when compared to not touching the accelerator.

Just found this too.

Simon mentioned to me just yesterday when I was collecting car after a refresh of tired components (190,000km old valve springs plus timing gear skipped a tooth!) that the actuator should be replaced every 80 thou.

Edited 12/07/13 12:00 PM12/07/13 12:00 PM by AdamIan69

Which actuator are we talking about here?

I popped the valve cover about a month ago and checked the timing gear, lined it all up with the chain took about 30 odd revolutions of the engine but I got it in the end...and it all checks out

I have done alot of tests and this is what I have found. With the throttle body closed (idle position) its going to 165psi, this is what I thought the engine to be, although when I have my foot flat on the floor and do the same compression test it goes up to 220psi. Quite a jump I thought

Any ideas?

Cheers,

did you take the timing case off? if not you can not check the timing accurately using the timing marks to be 100%, not saying that is or is not your problem but just making you aware

It'll be the vct actuator.