M50 360deg. thrust bearing??

[MikeDE]

I was poking around m42club, and saw that one member had used the full M50 thrust bearing in his m42. Checking Realoem, the upper half has the same #(830 iirc) between the m42 and m50. So, if the upper fits, then the bottom should as well. I figure if i'm going to go put this much in the motor, then I might as well replace the 22yr old rod/crank/thrust bearings as well.

[harv]

Yea I just read that too. I thought the poster had to machine the lower cap to accept the thrust bearing.

Here is the quote..
4) Main thrust bearing. The factory in all their wisdom decided to only use half a thrust bearing shell. This is not capable of handling the high rpm loads created by the M42. You will find the bearing to be rounded and burnt black. The crankshaft thrust surface must be inspected carefully. On the 2 engines I built one crank was scrap and the other barely within spec. To correct this problem you will want to replace with a full 360* thrust bearing. I do not know if the standard replacement bearings come with 2 halves. I use the early eta M20 main bearing set and have the lower main caps custom machined so they fit. This not only gives me a full 360* thrust surface, it also gives me a full 360* oil groove for improved oiling to the rod bearings. As a note, I pulled the oil pan on a M42 with 80K miles, it already had thrust bearing material in the pan, along with 4 oil pan bolts.

And the link on this site.

http://www.r3vlimited.com/board/showthread.php?t=197459&page=3

John

[KenC]

A new bearing set will come with a 360 thrust bearing.

[KenC]

Also get the updated the oil pressure relief valve.

[MikeDE]

Yea I just read that too. I thought the poster had to machine the lower cap to accept the thrust bearing.

No, this was a different member that said he used an M50 bearing. But I did read the post where this guy said he used a machined M20 bearing.

A new bearing set will come with a 360 thrust bearing.

Good that puts my mind at ease.

Also get the updated the oil pressure relief valve.

Will pick one up at the dealer....is this the one at the cylinder head??

[KenC]

The relief valve is in the bottom of the timing case. A snap ring holds it in. The whole mechanism was updated. Thankfully the whole set up is like $20.

I'm not sure if it's the same in Germany, but you can't buy bearing sets from the dealer here. You have to buy all of the bearings individually. It ends up being like 10x the price as buying a full set (same brand) from World Pac.

[MikeDE]

The relief valve is in the bottom of the timing case. A snap ring holds it in. The whole mechanism was updated. Thankfully the whole set up is like $20.

I'm not sure if it's the same in Germany, but you can't buy bearing sets from the dealer here. You have to buy all of the bearings individually. It ends up being like 10x the price as buying a full set (same brand) from World Pac.

Thank you, I will surely check it out.