Dezertoyota

I need to know what the minimum allowed head thickness is on a 93 22re.

calisurferdude2000

Do you mean warpage limit? If thats what you mean the it is for the
Block Surface-------- 0.0059 in. (0.15 mm)
Manifold Surface------ 0.0079 in. (0.20 mm)

Dezertoyota

I mean total head thickness....ex 3.7***

Glenn

Where are you measuring?

Dezertoyota

From the bottom of the head to the top of the head which is roughly 3.75 inches. Not the block or the manifold surface.

DudeBud

get a head gasket and be done with it, seriously you dont need a shim. I have never used them but know people who have and say they are a waste

kyle_22r

i wouldn't get a shim -- i'd use the increased compression to my advantage. what you'd need to get is an adjustable cam gear and a degree wheel. most people don't degree in their cams(me included), but it's a good idea and can unlock a bit of power...

the thing with a 22R is that it's overhead cam, so any deck height changes offset the cam timing, unlike a pushrod engine.

Dezertoyota

I did some more measuring and it seems my head has been decked .025-.035 from factory. I know this seems like a big spread but really its not to bad.

I have two ideas on what I could do.

1. I was thinking I could get a .020 shim and time it close to stock again.

or

2. I could get an adjustable cam sprocket and advance the timing some with a regular head gasket no shim. This way I can benefit from the extra compression to increase some power.

I am going to run a very mild crane cam too.

What do you guys think? Any advantages/disadvantages of either?

jimbo74

jsut run it normal shims are retarded and might cause more problem

Dezertoyota

....Or thicker head gasket without the shim and that would give me an extra .020. This would be the same as if I used a shim and a normal head gasket.

Any advice on the 2 options I stated above?

Dezertoyota

Or does anyone know who I can call since Im having a tough time getting an answer from here or anywhere. I have allready called a number of machine shops, cyclinder heads shops, and toyota shops w/ no luck......anyone?

99_Runner

Why would you want to shim the had back to the factory specs? If it's been decked, the only thing you are gaining is a little compression and horse power. Why would these be bad things to gain? It's not going to be enough to really do any damage.

I say leave it, and to the cam to get a little more power. This is on a 22RE so I would think you would be willing to take all of the extra power you can get. Post pics when you are doing this.

DudeBud

get the cam gear if you feel that you need one. you can also give LCE a call they might be able to get you some info

Dezertoyota

The reason I was asking about shimming the head close to stock because every shop I have talked to says you should shim it but I don't have to. Its recommended on anything under .020 should be shimmed ; Im at .025.

The reason I was asking about a stock head gasket (more compression), mild crane cam, then mess with the timing w/ the adjustable cam sprocket is because maybe I could get even more power out of it . I dont think Im going to do the adjustable cam sprocket though since I havent received any postive feedback on it or being worth the $120. I talked to LCE and they weren't much help except they told me to buy their cam sprocket.

What pics would you want? Ive been taking them as I have been doing this.

Dezertoyota

I called over 20 parts stores, machine shops, and Toyota repair shops and most all said not to run a shim. They said the shims don't last really long and stacking a head gasket and a shim isnt always a great idea. A .020 shim costs around $28-$32. Most everyone recommended a thicker head gasket with no shim. Also recomended was a timing set that corrects for machined cylinder heads. No one could get a price and some have never heard of this before. Plus I allready replaced the whole timing chain assembly with a new one so I didnt bother.

I finally talked to a women that was the biggest help out of everyone and knew exactly what I was talking about. She found me a head gasket that is .020 over and only $14.50. So I ended up going a better route and saving $15. Ill be running the .020 gasket with a crane cam and mild port and polish. It should run real good when Im done with it hopefully by Friday night.

ironroad9c1

dude increased commpression is a BENIFIT!!!

scoobie555

Hello i know this is an old post,but who(woman)helped with the thicker head gasket? Did you ever find out a min. thickness spec?

Racersk

In case anyone else wants to find the Answer... LCE has it.

http://www.lcengineering.com/LCTechP...TechNote48.htm


Note from bottom of cam journal to deck height measurements are quoted, NOT top of casting to bottom.

Mgwatts29

Best thing to do is bust out $950 for a new head from 22repreformance.com. New casting. I've had head gaskets blow due to resurfaced heads and aftermarket gaskets. These people know how to do it right. I've had my 2.5 head on my runner for 3 years. You use an OE gasket. You disrupt the compression have to run higher octane to avoid pinging.