Different Wrist Pin Bearings

[Reggie08]

I was out taking a closer look at the pistons and what-not for my 85 'Rude 90hp (E90TLCOS) and discovered 3 of my rods have different wrist pin bearings. They appear to be one piece or a caged bearing. The other rod has individual needle bearings with the upper and lower thrust washers. Are these interchangeable? Is it ok to have two different types?

 

[Dhadley]

Re: Different Wrist Pin Bearings

Yes, they are interchangable. At the rpm you'll be turning you won't see a difference. On a race motor we use the caged bearings. At that rpm the full compliment (loose) bearings are not as desired as the caged bearings.

 

[Reggie08]

Re: Different Wrist Pin Bearings

Good! I was a bit worried. I also noticed the two pistons I thought were good might need to be replaced. Both have some scoring/slight grooving in some areas. Something I didn't catch initially. My un-educated guess is they got hot and went out of round?

 

[dogday1]

Re: Different Wrist Pin Bearings

I have a very stupid question, which way do the thrust washers go. I am rebuilding a 115 V4 and I replacing the caged bearing with loose one.
Before I go any further I would like to know if I am doing it correctly. My first attempt at a rebuild.

~Mike

 

[Benny1963]

Re: Different Wrist Pin Bearings

reggie are you building another motor or is the one ya just built

 

[flabum]

Re: Different Wrist Pin Bearings

Reggie, the picture shows the correct orientation.

 

[dogday1]

Re: Different Wrist Pin Bearings

One more question. In the image I posted, should I have that much space between the washer and the piston? The piston shown has both washers and new bearings installed.

Thanks Mike