Well that was not what I wanted to hear

[Packet82]

After the long process of replacing the oil return lines and fighting the brake ducts on my car, I figured I should do a valve adjustment before I filled the oil for the third time in 300 miles or so.

So, I jacked the car up and got ready to do the job. I started unbolting the lower passenger side valve cover. The cover comes off and I hear a clunk in the oil pan I had been using to catch any remaining oil.

I fished around in the oil and came out with a nut. uh oh. I didn't see anything wrong with the rockers, but started feeling around to see if there was anything else in there. Here's what I found:



Looks like I'm going to be doing an engine rebuild.

Now I need to see if I can find a running 3.0 for a decent price to drop in while I rebuild my engine.

Here's a picture of cylinders 5 & 6:

[nineball]

if only one is cracked there is no need to rebuild yet. i've seen cars with more than one stud broken still drive fine for many, many miles.

[Joe Bob]

Common occurrence on 3.0s. Don't let it get you down.....a top end isn't that bad. If you're in there and the valves are OK.....it's pretty cheap. Unless you start doing upgrades.

[Packet82]

Engine has 142k on it. So, I have a feeling that's the tip of the iceberg. If I'm going in there to replace the head studs, I might as well freshen everything up.

Any idea what the rough price range for a stock rebuild is these days? I've heard anything from $6k-$15k and that's quite a range.

[Joe Bob]

4-6 nwith a valve job...less if you DIY.

[Packet82]

Originally Posted by Joe Bob

4-6 nwith a valve job...less if you DIY.

I assume that's for the top end only? I'd do it myself, although have John Walker rebuild the heads. Hopefully there are nikasil cylinders in there. I haven't been able to see a stamp on the cylinders.

[theFONZ]

I don't think I would drive with a broken headstud unless I had to.

I seem to remember a 3.0 for sale in the classifieds in your neck of the woods. Look at this as a learning experience and a reason to do what most will never accomplish. Then you can brag about how you rebuilt a 911 motor.

[timmy2]

I found one just like that this September...
Just to take it apart, fix the studs with steel ones (more for other types) and put it back together on your own:

Head studs X 12 $144
crankcase gasket Kit $57.75
Cylinder Head Gasket Kit $215
Cylinder to case gasket (.25mm) $36
574 Locktite case sealant $22.75
chain ramp brown $6.5
chain ramp black X5 $32.5
solid oil tube lines X 6 $53
Piston ring set $142.5

Total = $710
Plus any machining and parts needed for that work, tools you don't have and while you're in there's...

[5String43]

A year ago this past August my SC, with 148,000 miles on it, was treated to a comprehensive top-end rebuild. The tab was $9,800 with no corners cut - except that the P&Cs were reused rather than replaced. It runs like a champ now.

[porterdog]

At least 8k on my 964 one stud down. Whatever- I bought it to drive it; no issues I can see which are directly attributable to the bad stud.