Does anyone know the difference in 6 bolt and 7 bolt rod bearings? I just got my Eagle rods for my 7 bolt 2.3 build and it says to use 89-92 rod bearings. I was under the impression that all 4G63's used the same rod bearings. I checked ACL's web site and from the best I can tell they have the same part number.

 

Nevermind with a little searching I was able to find my answer. For anyone wondering the difference 6 bolt bearings are 23.5mm wide, while 7 bolts are 21.1mm. So I guess their is a advantage to going with the 6 bolt barings. A little more surface area for a bearing is a good thing in my book.

 

You have to trim the tang on the 6bolt bearing. Otherwise all the extra width will be offset to one side.

 

even with the Eagle rods that specify to use the 6 bolt bearings?

 

yes.

 

94AWDCoupe was definatly rite. The 6 bolt bearings need to be altered to fit the Eagle rods. The tang on the 6 bolt bearings is actually wider than the 7 bolts, and dosn't even fit in the groove on the rods. I didn't like the idea of filing the tang, so i used the 7 bolt bearings wich fit just fine. Like previously stated other than the tangs the only difference is the 7 bolt bearings are bout 1.5mm narrower.

I took a pic to show the differience. I tried to get one showing how the 6 bolt bearing tang didn't fit in the rod, but my crappy cammera dosn't do well with close ups

 

I used seal power 6 bolt bearings. Out of the box the tangs fit the 7 bolt groove. They just offset the bearing to one side. You have to trim the tang by about 1mm so it can be fitted in the center of the rod cap. Some may not like this so a 7 bolt bearing may be a better choice. With stock bearings supporting 600whp on stock bearing width and dont think there is really a need for the extra width.