Rebuild of the SC's 1UZ
- Thread starter rdm20fan
- Start date
The 1UZFE EGR Delete Kit is available for sale here.
Lextreme II
Active Member
Bob,
Very nice... beautiful forged pistons. You should get MLS gaskets and ARP Studs with it, then BOOST>>>>. at least 20 psi.
Very nice... beautiful forged pistons. You should get MLS gaskets and ARP Studs with it, then BOOST>>>>. at least 20 psi.
Chrisman and I put a 20v 4A-GE together.
We went from N/A to Boost on it also, and went through a couple of head gaskets at low boost.
we ended up using a stock Toyota Head gasket, and pushed the 1.6L to 20 PSI, and never had a problem.
We also had trouble with after market rod bearings, and ended up changing back to toyota bearings.
I have done some research with head gaskets, and have not found a company who makes me feel comfortable.
For my application, I think Toyota Head gaskets, are what I want.
We went from N/A to Boost on it also, and went through a couple of head gaskets at low boost.
we ended up using a stock Toyota Head gasket, and pushed the 1.6L to 20 PSI, and never had a problem.
We also had trouble with after market rod bearings, and ended up changing back to toyota bearings.
I have done some research with head gaskets, and have not found a company who makes me feel comfortable.
For my application, I think Toyota Head gaskets, are what I want.
Peewee
New Member
Quick question dude.
Can you install the pistons from the bottom up?
I ask because I want to do headwork, and new pistons, but funds may not permit it to be done at the same time.
So I was going to do the heads, then a few months later get new pistons, but not if I have to remove the heads to put the pistons in.
Can you install the pistons from the bottom up?
I ask because I want to do headwork, and new pistons, but funds may not permit it to be done at the same time.
So I was going to do the heads, then a few months later get new pistons, but not if I have to remove the heads to put the pistons in.
Lextreme II
Active Member
Red,
The VVT-i have mls, but the water passages are different from the early 1uzfe and it might have a cooling issue.
The VVT-i have mls, but the water passages are different from the early 1uzfe and it might have a cooling issue.
the new head gaskets I got from Lexus are different then the ones we took off.I did notice that the oil stains at the rear of the head were alot draker then the front of the head, and the new head gaskets seem to have the larger water passages toward the last cylinder. I'm hopin this is to run more coolant tward the rear.
Thanks for the info about the VVT head gasket Max.
I'll look into that for the AE86's motor.
Chris and I did not replace the rod bolts.
I think (Hope) we are going to be ok.
Thanks for the info about the VVT head gasket Max.
I'll look into that for the AE86's motor.
Chris and I did not replace the rod bolts.
I think (Hope) we are going to be ok.
Lextreme II
Active Member
Bob,
Please tell me you going to replace those used oem head bolts. The head bolts are not suppose to be re-use.
Please tell me you going to replace those used oem head bolts. The head bolts are not suppose to be re-use.
Lextreme II
Active Member
If you going to spend that amount of money on the motor. U should at least get new oem bolts. What i heard from my mechanic and Toyota Tech stating that those bolts should not be re-use. They are stretchable bolts and should be replace when heads are taken out. FYI....
Chris, its that you? Torque the main stud with an extension bar?
Chris, its that you? Torque the main stud with an extension bar?
Chris, & I heard that too, or at least the internet says so,
We double checked with our local Lexus, & Toyota dealer. (largest in the US)
They both claim that they reuse the head bolts. and only replace them if one is broken
The SC manual claims they can be reused.
It's not a fact of the $ for a new set,
Chris & I have lots of faith in Toyota, and belive that this isn't a week point.
There are a lot of guys making alot more HP then me, on the stock parts.
I think we will be ok with the stock head bolts.
We double checked with our local Lexus, & Toyota dealer. (largest in the US)
They both claim that they reuse the head bolts. and only replace them if one is broken
The SC manual claims they can be reused.
It's not a fact of the $ for a new set,
Chris & I have lots of faith in Toyota, and belive that this isn't a week point.
There are a lot of guys making alot more HP then me, on the stock parts.
I think we will be ok with the stock head bolts.
the picture is me with the pipe, on the mains.
They call for (I think) 18 Ft lbs plus an additional 90 degrees. the pipe makes the 90 degrees very smooth.
I was posing for the picture, but somebody cut off my head.
We figured someone would catch it, and comment. thats why i posted it.
They call for (I think) 18 Ft lbs plus an additional 90 degrees. the pipe makes the 90 degrees very smooth.
I was posing for the picture, but somebody cut off my head.
We figured someone would catch it, and comment. thats why i posted it.
jibby
New Member
Hey guys looks like a fun project-
What type of forged pistons are you using in that 4.0 liter V8 motor? What other parts will you be changing out from stock? What is your hp goal with your twin turbo's. Did you bore the block out and to what size if you did? I am heading in that direction with my sc400, I am looking for a 1998 motor to build but they are hard to find. Those are the best motors from all the sc400's. Lexus did not sell to many in 1998, apparently I was told only 800 were sold, and I guess none are not many are at the junk yards. The search continues.
What type of forged pistons are you using in that 4.0 liter V8 motor? What other parts will you be changing out from stock? What is your hp goal with your twin turbo's. Did you bore the block out and to what size if you did? I am heading in that direction with my sc400, I am looking for a 1998 motor to build but they are hard to find. Those are the best motors from all the sc400's. Lexus did not sell to many in 1998, apparently I was told only 800 were sold, and I guess none are not many are at the junk yards. The search continues.
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