Blown head gasket warped heads and block

2006 4.0 blown head gasket, decked block milled heads fitted oversize gaskets,all new parts timing chain timing off[i have checked 20 times at least] i know you will want more info,but has anybody replaced oversize head gaskets

 

OMG, how hot did this thing get?

 

to not

 

i have spoke to a lot of repair shops in south florida they say another engine,but if i can get timing right we could save people a lot cash

 

What's wrong with the timing?

 

due to the resurfacing of the heads and the block the distance between the camshafts and crankshaft has changed

 

Ok. Good luck with that.

 

This thread makes no damn sense.

Are you asking if anyone has replaced oversized head gaskets before and asking for help?

Or are you telling people what you have done?

 

sorry if i did not make myself clear i am in the process of trying to ascertain how to shim the engine to original specks

 

yes i am looking for someone who has done repair,for input

 

Hop on over to Tundras.com for extra input.

 

This tundra has the same 4.0 as 2nd gen Tacos, 4Runner, etc.

Hey OP

 

OP. The factory manual specs for warpage on the 4.0 are these.
Cylinder Heads - 0.0039” max.
Cylinder Block- 0.0020”max.

If warpage exceeds max, replace those components. Reman heads are probably all out of spec too since the manual says the parts cannot not be resurfaced. it doesn’t even give a spec.

If your head and block are within warpage spec I would just put the head back on if it is not cracked. This is if your DIYing to save cash. If not I would look for a used engine too. OR find some good condition used heads that have not be resurfaced. I’m going to do this job also on an 05 Tundra and am waiting for my straight edge to come in to check the flatness. Hopefully everything is still reusable. God bless.

 

Also, shims that are too thick may actually be only a temporary fix. The gasket is only supposed to seal the block and head and not actually be apart of the combustion chamber.

How much did the machine shop take off originally?

 

Maybe this will help next time or someone else.

https://www.youtube.com/watch?v=A3cRq-4nmt8

 

I recommend you find a replacement engine. Either a reman from a vendor with a good warranty and reputation or a used low mile original condition engine. Toyota doesn’t recommend rebuilding a warped block and cylinder heads. They don’t even give a spec.