Interesting debate about the 1.5jz

[suprahero]

http://www.toymods.net/forums/showthread.php?t=21732

Apparently alot of these guys feel that you have to weld the 1jz head and then redrill it so one of the oil feed holes line up better. Some say no and some say yes. I'm hoping for the no, because a few guys on here and supraforums have done it without this option.

I've been told to use the stock 1jz head gasket. Would you still use a stock gasket if your block has been decked .010 and you're also going to have your head reworked and maybe resurfaced?
The machinist said he thought a 1.6 mm head gasket would bring the compression close to stock, but I was thinking about a 1.2. I think the stock is 1.0, so any suggestions would be great. I really need to get this ordered quickly. Thanks again.

 

[The Reaper]

never heard of that before either

.010 off the head??? was it warped real bad or something? i had a BHG that i drove on for MONTHS and i only had to shave .06 or is .06 more than .010??? im lost HAHAHA

anyways 1.2 would be fine i'd think.

but i've never heard of welding the head and then re-drilling

 

[tissimo]

1.5 is fine, no drilling or anything needed. several are running around with 1.5jz without issues.

stock is a 1.2mm gasket iirc.. stock would be fine. no need to spend extra money on a thicker. higher compression has its benifits

 

[Jostar]

I read somewhere in supraforums that the 1jz head gasket was better, It had bigger oil & water passages, Feel free to correct me if i'm wrong.

 

[annoyingrob]

oh god. The toymods 1.5JZ thread.

Ok, the oil feed on the 1JZ and 2JZ don't perfectly line up. The 1JZ head gasket has a larger opening for the feed in it. This larger opening sort of fills in the area between the offset holes so that oil gets up there.

It won't be AS MUCH oil as normal, but it works fine.

 

[suprahero]

Thanks, and I didn't mean to hit a sore spot Rob.............:biglaugh:

I will order the stock head gasket then. Thanks

I think he may have been talking about the head and the block being resurfaced, but I don't know. He told me roghtly .010..........:dunno:

 

[annoyingrob]

It's not a sore spot, I just didn't think anyoe else actually knew about that thread.

I was probably one of what, 4 people on toymods who actually had a working 1.5JZ? I figure that's worth something. Most of the comments on there are rumors and hearsay.

 

[93kyumaru]

Yeah there is a lot of that going on like for instance the 1JZvvti Rods being weaker haha that is a funny one they are the exact same part number they have been using the same style rods since the 1J's induction.

But yeah Rob is right the oil passages do not line up perfectly but the 1J HG solves that, and the factory 1J gasket is 1.0mm not 1.2mm

 

[suprahero]

After being told countless times, I went ahead and ordered the stock head gasket. Am I going to have any interference problems at all? I don't know how high the pistons come up and the valves come down or anything like that, but I was hoping it was 1.2 mm.

 

[800rwhpmkiii]

1.5jz is a waste of time man. why even bother? you shouldn't have went 1JZ if you want 3 liters. 7M was already 3 liters and it was put in the car from the factory so obviously it was set up properly for the car. stick to what belongs and have the 3 liter from the beginning.

 

[tissimo]

1.5jz is a waste of time man. why even bother? you shouldn't have went 1JZ if you want 3 liters. 7M was already 3 liters and it was put in the car from the factory so obviously it was set up properly for the car. stick to what belongs and have the 3 liter from the beginning.

:rofl:

 

[800rwhpmkiii]

what? i have never had a problem with my 7M. not once. no head gasket problems or anything. you drive a stock car so you have no room to talk

 

[tissimo]

what? i have never had a problem with my 7M. not once. no head gasket problems or anything. you drive a stock car so you have no room to talk

:rofl::rofl:

 

[800rwhpmkiii]

wow you are real mature

 

[drewgo]

Yeah there is a lot of that going on like for instance the 1JZvvti Rods being weaker haha that is a funny one they are the exact same part number they have been using the same style rods since the 1J's induction.

How can they be the same part # and be physically different?

 

[suprastanger507mgte]

:biglaugh::biglaugh::biglaugh::biglaugh:

:rofl::rofl:

:biglaugh::biglaugh::biglaugh::biglaugh::biglaugh:

 

[suprastanger507mgte]

wow you are real mature

This is an intelligent discussion on a 1.5 JZ . Please don't force your opinions about your 7ms here....we have all started with 7ms and moved on. keep on topic.

 

[Jostar]

:blah:

what? i have never had a problem with my 7M. not once. no head gasket problems or anything. you drive a stock car so you have no room to talk

Yeah ok.

 

[drewgo]

what? i have never had a problem with my 7M. not once. no head gasket problems or anything. you drive a stock car so you have no room to talk

You must not turn the car on at all then!

 

[The Reaper]

Drew calm yourself LOL

read the other thread. it was a buddy of mine from work being a jackass