Bill Ball

Yup. That's what we found when we disassembled Dennis's motor.

BC

You assembled an S4 motor and it did not have the second bushing?

atb

Brendan, that's correct.

I've disassembled two S4's and ond 32vS, all only had the rear pin. When I reassembled the RMT engine, I installed the second upfront just for kicks, but there was only one on disassembly. I'll fit the second one on my stroker for sure.

BC

But Mike and hammer say that its imperative that the whole engine be re-aligned if you put the second one in? No Problems with this engine?

Because I with the operating parameters of this stock+ block, it will need all the help it can get. This is why I have gone the block half studs, and thee girdle, and the arp head studs.

mark kibort

I think you can see that this block has both of them there.

mk

atb

I've got no business even attempting to argue with either of those guys, but I can say that there were no issues. It may sound pie in the sky, but I think Porsche has done an exceptional job of maintaning their specs with regard to the positioning of both shuffle pin holes and the mainline. I'd find it hard to believe that an oil pump blank was mounted when they bored the mainline at the factory, but I guess anything is possible.

BC

Neither do I. As suggested privately to me, I will align the block with the pump as the WSM suggests, measure, and then see what I get with a second bushing.

I just can't take any chances either way. I have made it a point to think of every detail I can.

Lizard928

Is that why it has taken you so long to get this far

atb

Well, like your thread title says, it pays to double/triple check. I'm definitely would not condone taking anything for granted.

And Colin, you behave.

Dennis K

91 GT block on left, 85 S3 block on right. It's not on either.

Vilhuer

AFAIK front locator was deleted when #1 main bearing was changed to single piece style. This was in '83 MY IIRR.

Hilton

Hey, give him a break, he's doing as much thinking as the entire 928 design team.. on his own!

BC

That and I don't work on the car more than 10 hours a week or so.

Details: My pedals are Powdercoated blue, the suspension caps on the front are pc'd two different colors. The pistons have skirt coatings and top coatings. The heads had to kind of be rebuilt twice, and now I have to take them apart again to clean them properly - crap like that takes alot of time.

Oh, and I moved two years ago. It took me about 2 years to paint the car.

And a few times, the project has had a little "creep"

BC

Interesting. I suppose with that bearing and the crank in, there is not a lot of aligning to do except with the oil pump.

My concern is what I will be putting the block through.

Mike Simard

As usual Erkka knows the answer

BTW, my 87 block has the front counterbored but it's a mystery why. It might be that the feature continued to be machined in production but it's not used for boring the mains. In my block that front counterbore is about .0035 off position, that's why I said earlier to beware about using it.