Tom R.

I just spoke to the original owner of an 84 im going to look at this weekend. He said compression was bad in 2 cylinders when the car had 76k.

Is this abnormal? What would it be a sign of. The good news is at least the motor is relatively fresh, as long as a decent mechanic did the rebuild.


I thought the valves went bad closer to the 100k mark.

thanks
Tom

Jay H

It seems the typical mileage for valve guide wear, if this rare problem even shows up, on the 3.2 motors is in the 40,000 to 60,000 mile range. This car definitely could have had this problem at that mileage.

NeverLift

I didn't see valve guide issues till 125K. A top end rebuild will be needed to fix valve guide issue but it is rare to has this happen under 80K usually its well over 100K. I had my top end rebuild done and put in C2 cams. My wrench say the car should be good for well over 250K! When the engine was open (142K) I couldn't believe how great the cylinders looked. Just like new. These engines are built to last minus the valve guide issue. My wrench also stated new modern valve guides will last much longer.

Tom R.

it was probably a top end rebuild since he said he also had the clutch done then, and paid "about six grand" for the job

Doug&Julie

Actually, in the early 3.2 motors many mechanics have found motors that were wearing their valve guides by 70k miles. It IS rare, but it has happened enough to take notice. From what I remember, most experts advise if it hasn't happened by 75k, then it probably won't happen for a long time. ..and the "fix" would last a long time as well.

That said, these ARE among the most reliable of 911 motors.

Tom R.

He didnt sound like he abused the car. thanks. now i just have to talk him down a bit, and get she who must be obeyed on board. not necessarily in that order.

87turbo911

Then again, you could always find out how much I'd want for my 1986 911 Targa and not worry about the rebuild. It's got ~86.5K miles on it and was PPI'd at about ~86K miles by my mechanic (for my own reference). 1-2% leakdown...upgraded clutch.

But I'm not the original owner and, being that I bought it from an Exotic Used Car dealer back in May 1999, only have service records from back then...first was done by the dealer, the rest by PowerTech. The only "DIY" I've done on it was to replace a third light stoplight bulb...but only because I didn't (and still don't) want to mess up the car by me tinkering with it.

-Adrian

Tom R.

87 pm'd ya

87turbo911

Got it an responded!

Jay H

I agree with this and it's what I remember too.

g-50cab

That is what I have heard too -