Mike Simard

Mark, the idea of mixing banks was nixed a few posts ago.

Big Dave

The oil tube is still pointing in the wrong direction. The hole where the other end mounts is on the opposite side of where you have it going. I'm still confused about how yours is set up.

I've rotated your picture. The tube should follow the green path in your picture, not the red one. I assume you just haven't bolted the tube down yet, otherwise you've got a verrrry odd cylinder head.

Big Dave

Another thought...make sure you have the chain tensioners on the correct sides of the engine! Each side's tensioner is different, not just top/down opposites.

Mike Simard

Big Dave, I have some 87 and 88 heads here and they all have the passage on the exhaust side like Hammer's. Could this be a difference between your 85-86 heads?

Big Dave

I suppose, but he has an 86.5, so it would be news to me that this was another mid-year difference!

Bill Ball

Very nice documentation, Dave.

mark kibort

I have S4 heads on the passenger side, mine points down to the exhaust side as well. mine are S4 heads, what are the ones you have posted?

mk

Big Dave

Apparently 85-86 heads are identical, but 86.5 models use S4 heads. I learned something new.

6.0-928S

Sorry Dave, the engine is an 87. In my picture you can see the other end of the tube, I haven't installed the bolt in that end yet.

Hammer

Big Dave

Now I understand.

mark kibort

I dont think that is true. can someone verify that? i think all 4 valve 86s even the newer ones use the same heads. unless the newer ones use a similar casting to the S4 , but still the smaller valves.
anyone know for sure??

mk

atb

My bad Hammer, I thought the shiny tensioner post was just reflection from the camera flash.

Well, a little exhaust retard never hurt anyone, at least you won't have any issues with pump gas. Sorry, misplaced humor.

I just looked at the WSM. I don't see the tensioner installed in any of the pics Hammer. Maybe take it out and see where you are.

Big Dave

When my cylinder head for cyls 1-4 broke in '06, I bought a used '86 head. It was identical to the 85 head I was replacing. 86.5 heads may also be the same..as 85 and 86. Hammer revealed a few posts ago that he's using an S4 engine here.

atb

One thing also to bear in mind is that the lobe tool is just to get you in the ball park right? Your crank is at 45 degrees right now, so the pistons are out of the way, and the tool is just used a fool-proof method method to make sure the cams are close. Actual timing at 20 degrees with the dial gauges comes later, and those adjustments could certainly put the cams out of phase so that they don't fit the tool I would imagine.

I'll be honest, I've never used the alignment tool. I think I'd have gone nuts if I came across your situation. If you're sure the LSA hasn't been changed by the regrind, I'd say move along.

Big Dave

I say remove the chain tensioner and check again. If it the gage fits, move on with your project. The tension on the chain is probably shortening it a bit, leading to your situation.