05-10-2018, 06:39 PM
Good afternoon, gentlemen. I was hoping to get a some clarification on the different types of connecting rod bolts for the Mac 101 series engines. Up front, my simple question is; do the splined rod bolts fit in and can they be used in all of the following 101s (A, AA, B, D)?
I ask because, even though guys refer to the spline bolts as "101" bolts, I found the IPL part numbers for the bolts vary from model to model. Although, according to the IPLs, the 101A, 101AA, B, and D all use the same connecting rod (part# 86415) (the 101A is #69250), the same piston (part# 84469), and the same roller needles (part# 69891); the 101B & D use differently numbered bolts (110720) as compared to the bolts for the 101AA (110470). I also found that the 101A uses yet another numbered rod bolt (part# 47819A) as compared to the three previously mentioned.
So that leads me to a couple more questions...
First, what are the physical differences in the differently numbered bolts?
Second, which of the above rod bolts are the correct ones for the 101AA if indeed there are physical differences in them? I ask because I just want to know for sure that the spline bolts I have are correct for the 101AA.
Man, I sure hope I didn't make that too confusing! Thank you in advance for any help you can provide, thank you for all the help thus far, and thank you for your time and consideration...
I ask because, even though guys refer to the spline bolts as "101" bolts, I found the IPL part numbers for the bolts vary from model to model. Although, according to the IPLs, the 101A, 101AA, B, and D all use the same connecting rod (part# 86415) (the 101A is #69250), the same piston (part# 84469), and the same roller needles (part# 69891); the 101B & D use differently numbered bolts (110720) as compared to the bolts for the 101AA (110470). I also found that the 101A uses yet another numbered rod bolt (part# 47819A) as compared to the three previously mentioned.
So that leads me to a couple more questions...
First, what are the physical differences in the differently numbered bolts?
Second, which of the above rod bolts are the correct ones for the 101AA if indeed there are physical differences in them? I ask because I just want to know for sure that the spline bolts I have are correct for the 101AA.
Man, I sure hope I didn't make that too confusing! Thank you in advance for any help you can provide, thank you for all the help thus far, and thank you for your time and consideration...