Rob Edwards

I know nothing about 944S2 and 951 engines- do they have crank oiling or detonation issues?

hacker-pschorr

944's are notorious for spinning the #2 rod bearing. My 944S was never tracked and always good oil every 3,000 miles. One day in traffic it started knocking, destroyed the engine.

RyanPerrella

Thats an interesting torque value you found in that TSB Rob

"18 ft/lbs plus 90 deg rotation"

Havent seen that before

cobalt

I will try to remember. i don't have it on this PC and i am heading down the Jersey Shore in the AM. I will leave my self a note for next week.

cobalt

The S was a different story but the S2 and turbo didn't have these issues AFAIK. I sold my S2 with over 100k miles on it. The current owner has done extensive work to it and it has closer to 150k miles no issues at least not with the engine.

hacker-pschorr

Turbo's have the same oiling issue as the 8V non turbo and the S:

https://rennlist.com/forums/944-turb...ing-issue.html

It's rare for a street 944 of any model to throw a rod bearing.
I'm curious to know what they did with the S2 to "fix" the problem.

cold_beer839

At minumum, the R1 rods would be replaced with better the better R2 rods. Custom rods would be preferred for peace of mind, depending of what is available.

I have been told that the stock pistons are very good and only need to be drilled for oil return in the ring set.

cobalt

I wish I could help. Although I enjoyed my 944 S2 it is gone to a new home. I do recall that their is a replacement interval for the rod bearings IIRC it was around 100k miles. This is usually done when the rear seal of the balance shaft requires replacement and can be easily enough done with the engine still in the car.

Rob Edwards

I've got five that I'll sell cheap....

cold_beer839

Keep in mind that it would not be $troked. I am merely a peasant working the fields.

RyanPerrella

what happened to the other 2? I know what happened to piston #8

Greg B sent me an early piston and R1 rod i was going to give you to complete your set so youve got 8 again. I couldnt think of a better purpose for the think honestly.

Rob Edwards

There are chunks missing out of #2 and #6, (6 is much worse than 2, 2 just got pushed up into the valves while 6 kept getting pulled into the melee) and somehow #5 got some shrapnel wounds as well.

EDIT: Piston snuff film:

2,5, and 6:



2 and edge of 5 closeup:

RyanPerrella

Rob,

I think those beat up pistons would be best served as target practice for the drill press so i can hone my blind hole drilling technique!

Rob Edwards

They already look like they've served for target practice. I'll give you a few next time the crew is together.