How can i tell the difference between a 12a and a 13b front cover?

I dont think there is a difference? Or is it the bolt holes for the oil pan are different?



No now that I think about it, a 12A cover can be used on a 13b.



So I think there basically the same. As long as we are talking about FB stuff, the FC stuff is totally different...

if you look on the right hand side where the metering pump goes, the 13b gsl-se uses an o ring and the 12a does not. that is the only difference afaik



mike

i think 13Bs have 4 oil injection lines as opposed to 2.

The mounting holes for the OMP are in a different location due to the 13b using a 4 port OMP vs the 2 port on the 12a.



If you need to know exactly where the holes are in reference to the 12a cover, I can go out in the garage and look (I have a 12a and 13b front covers).

I read that you can't use the OMP on the 12a cover.IS there any justification to this? https://www.nopistons.com/forums/pub...IR#>/dunno.gif

Thanks all, thats what i needed to know. I picked up a 13b and wondered if possibly the front cover had been previously changed.