964 oiling questions, re; new bearings

[Glenn at Pelican Parts]

Hi guys, I have a customer who's rebuilding an '89 964 engine. I sold him Glyco parts and he's concerned about the fact that the new IMS bearings and the new wrist pin bushings don't have what we believe are oiling holes. He didn't include a pic of the new wrist pin bushings but they don't have any holes in them. Should there be 2 holes in the new bushings that line up with the holes at the top of the rod? We don't have genuine Porsche wrist pin bushings on the shelf to look at but from the homework I've done so far, none of the replacement IMS bearings nor the wrist pin bushings have the oiling holes. Is that the case and are they not needed or?

[Dpmulvan]

Wrist pin bushings are not plug and play, they need to sized and honed correctly and holes drilled.
Not impressed with the look of the new glyco bushings. 2 piece and just look cheap I wouldn’t want them in my rods.

[targa72e]

Yep, wrist pin bushings need to be drilled (and sized). Intermediate shaft thrust bearings shown do not need holes. The two non thrust bearings at the other end of the intermediate shaft have holes. Intermediate shaft is hollow, oil is feed from non thrust bearings thru intermediate shaft to thrust bearings .

john

[Dpmulvan]

Did customer weigh and balance rods?

[Mark Henry]

Originally Posted by Glenn at Pelican Parts

The bearing on the right is an aircooled VW beetle or T4 cam bearing, exactly the same bearing, but the hole is wrong for a 911.
I've also used the VW thrust in 911 builds because at times they are better quality.
BTW since the 90's I use Porsche DT bearings to make up DT VW type 1 and 4 cam bearing sets, because they only come with a single thrust.

You have always had to drill the holes in the new rod bushings.