Possible to fix broken camshaft thrust journal?
Posted: Sat Apr 26, 2008 9:30 am
So I am trying to do a 22B conversion on my 91 Legacy. Rebuilt 2.2 bottom end with forged Wiseco pistons in a .5 mm overbore, with Ej20G heads. I got the heads today from California (I reside in Alaska) and the boxes were real beat up. I pull out the heads and everything looks good until two little crescent shaped pieces of aluminum casting fall out and I can tell they broke off something. I can't find what they came from until I take the valve cover off:
PICS
Notice the top piece has an oil galley in it. The bottom piece can be replaced as it comes from the bearing cap, but the bottom one is cast into the head and obviously they function together as some sort of thrust bearing for the camshaft. I think the box was dropped right on that cam and of course broke it off.
Is it fixable?
I know the top part is but the bottom part is very tricky as it has a machined surface on the inside part and has that oil galley. I'm going to guess that is an oil outlet and there is an inlet somewhere that feeds oil into this journal and without that bottom piece it won't keep proper oil pressure. But alas these heads were very expensive and I am all out of money to buy a new set, even if I had the money I don't know if I could find heads like this. Their supposedly the highest flowing head Subaru made and have hydraulic lash adjusters which are really nice.
PICS
Notice the top piece has an oil galley in it. The bottom piece can be replaced as it comes from the bearing cap, but the bottom one is cast into the head and obviously they function together as some sort of thrust bearing for the camshaft. I think the box was dropped right on that cam and of course broke it off.
Is it fixable?
I know the top part is but the bottom part is very tricky as it has a machined surface on the inside part and has that oil galley. I'm going to guess that is an oil outlet and there is an inlet somewhere that feeds oil into this journal and without that bottom piece it won't keep proper oil pressure. But alas these heads were very expensive and I am all out of money to buy a new set, even if I had the money I don't know if I could find heads like this. Their supposedly the highest flowing head Subaru made and have hydraulic lash adjusters which are really nice.