I got this head from a complete 1985+ 22R engine I'm going to rebuild, The engine looks to be in good shape, but with high miles. It spins freely. I'm trying to do this on the cheap, so I'd like to have this head rebuilt.

When I took the cam off I noticed one of the cam races is scratched pretty badly. The others look OK. I'm wondering if I can use this head or am I looking for trouble down the road?

I've considered having the race welded up and align bored. Good Idea, or waste of cash?

Also, take a look at the distance of the water jacket(s) from the combustion chamber, too close? normal?

With the exception of the scratched cam race, The head looks good. The head is flat, with less than .003" variation. The water jacket ports are clean with no electrolysis, with an overall head height of 3.772"-3.776"
I measured the cam/head gap with plastigage the clearances are .002/.003"

If anyone has any observations I'd be grateful to hear them.

If this head is shot/questionable I'll just get a new one from Engnbldr.
Haulie

I think that it would be fine.
looks like there is still plenty of flat surface in there.

>>>*Morning!

Got your email thanks for the link. That cam race is nasty, the cam is shot for sure. Still, enough bearing surface to run, I would suggest you have the machine shop shave the cap and rehone the cam line, it is going to be off alignment.

Some do weld that up and redrill, but my experience is the head warps even more unless they heat it first and mount it to a plate.

Kinda spendy, you mentioned "budget"? Kids wanting food and electric bills, silly things like that, right?

I understand.

Yep, that is rebuildable, bit more work than we like but cheaper than a new good one.

*Probably not cheaper than some available that are not so good, I see the China ones under $180 now from time to time. They will run too and get you by. Pure aluminum in those though so make sure it's good Toyota coolant and distilled water to avoid corrosion.

The rest looks OK. BTW: You have metal in the short block, I would hang some bearings in there, even the good ones are cheap now....*EB

Thanks for your response Ted.

OK, I'll have to see how much material the shop takes off the cam race to clean it up. Hmmm, I'll also have to account for any material removed from the bottom of the head to flatten it out, although it should be less than .005" And any material removed from decking the block...

How many thousandths of material needs to be removed overall before an adjustable cam gear is warranted? .010", .020", .030"?

I'll also have the block gone over along with the head, probably have the cylinders bored .010", deck flattened, rods checked, crank ground, etc....

>>>*At .020" we can correct with the .020" thicker head gasket, after that we determine the type of use. If low end is desired and it usually is with these, then we would consider adjusting at the gear....*EB

Not wanting to hijack this thread much, but here's a question on the topic for EB:

I had my head shaved .008-.010 and using a regular gasket. Will that little bit throw things off to any noticeable extent?

Is this gasket available in the "Turbo" application you sell?

I forgot to ask... Been a couple millings on my head, and I am sure I am a good 3-4* retarded now.

>>>*Nope. Just fine there. You might notice a tiny bit of midrange power gain from compression increase and valve timing retard is all. More likely if will feel the same....*EB

[/quote]

Is this gasket available in the "Turbo" application you sell?

I forgot to ask... Been a couple millings on my head, and I am sure I am a good 3-4* retarded now. [/quote]

>>>*I know you have had quite a bit of trouble with head gaskets, even ours. I am not completely sure why since we really get very few reports of failures.

The one thing I do note is the failure in your cases repeats in the same place.

A couple of years ago we had an engine that popped head gaskets every 3 months, we could darn near set our watch by it. The 3rd time we did use the turbo head gasket, lost that one too right on schedule. Then an ACL, next a Felpro, same result.

We had a pretty good rebuilt head on the bench a customer had abandoned so Tod grabbed that one and handed it to the customer. He was a nice guy and understanding, fact is he didn't know what was going on either.

Back in 90 days, same thing. Tod got fed up and had the customer bring in the short block. He bored it and then decked it, on the 2nd pass across the mill this nice little sand pocket appeared in the deck of the block, right by number 2 cylinder, right where the head gaskets had been blowing over and over and over.

He just grabbed another block, machined that, end of problem.

The block had a casting flaw that was no problem when stock but became one when the block was originally decked just .010" the first time. The flaw appeared on the 2nd cut. In other words, we actually created the problem using normal machining methods, the deck was weak enough in that tiny spot it would not support the clamping force.

Now I looked at that, never seen it before or since. Darn rare with Toyota, unlike Ford FE's where we expect to see one. Unheard of, who would think to sonic test a Toyota engine block? We would check one heck of a lot of those for nothing, this doesn't happen.

Maybe something like this in your case, I don't know. I wish the block was in my hands, I would be chopping it up to find out. Things like this are possible with heads, too, especially if overly milled. I would like to chop your head up into slivers, too.

*Yea, I know.... <img src="/forums/images/graemlins/lol.gif" alt="" />...But I have been known to do things like that when I get frustrated.

Sometimes throwing in the towel and grabbing another powerplant is the solution.

The turbo head gasket isn't available in a thicker piece in our lines, we use the regular thicker one on the turbo when required. My worry is it may not be a solution for you anyway....*EB

My other half says that if I get stationed at Ft Lewis after my time here is done (might have to for medical reasons anyway), you can chop up my block as much as you want...

Only thing I'd want in return is a running engine put back in. <img src="/forums/images/graemlins/nana.gif" alt="" />