Originally Posted by GSXRYDER
Took the M3 out for a test drive...seems to have plenty of motor. I talked the sales guy down...Like I am sure they are still making plenty. To $9990 with exactly 77K miles. I can find no evidence of the waterpump having been changed so I am sure that is not to far off. The oil did kind of smell so there may be some 'blowby' I told the sales guy I was going to have the compression verified before I make the purchase. How much pressure is stock for this 3.0L engine? Does BMW allow a 10% deviation or is it 5% before they recommend that the motor be rebuilt. A very nice car...heated seats worked great. In fact everything worked great except the radio had 'code' displayed...how do you clear that out? Thanks for the advice...if everything goes as planned I should be a proud M3 owner by Jan 1...
How do you work the tranny? there were 3 settings on the tranny switch 'S' which I am presuming is 'sport' 'M' which I am presuming is 'manual' and it did something when you press it in? anyone let me know...thanks
Whatever your numbers, they should be within 5% of each other and within 10% of highest to lowest. You'll see psi's from 150 - 210psi. As long as they are within 10% across the board, meaning if you have 190 across, you don't have 50psi in one cylinder.
with the radio there is a 5 digit code which the dealership should beable to look up in thier database to find out... the code just needs to be entered as they probibly changed the battery or something and reset the radio... make sure they give you the code before you buy it so that incase it happens again you will have it on file...
as for the tranny.... (stole this from someone else as ive never learned it even as i owned an auto bimmer... )
When driving in "3" in the A mode the car will start in gear 1 then shift to 2 then to 3 and will not shift to 4.
When driving in "3" in the M mode your car will start in 3rd and will stay in 3rd indefinitely.
Do not drive in M unless you are driving in adverse conditions where low gear tire slippage is an issue.
On some sports models there was also a "S" option that tweaked the computer for more spirited driving.
Also, it's not recommended to shift your auto like a manual unless it's the steptronic. It can do damage to the transmission.