Dang my head has a crack guess I should throw it away ..........naaaaaaaaaaa

[NashMan]

Well I have been on here for a long time :: tumbleweed ::and I have never scene this done yet here on any of the supra based forums

since I have put some money/time into this head it was worth fixing and not given up on it



Well this is the crack started it all....I found out after I popped the exhaust seat out the crack went all that way into the port this was a big :kickinthenuts: I must say

So after a fair of grinding all the way into the port :yikes: it was welded up then ball peed after each pass of filler rod to bring the slag up form the drity cast and you get this

looks like a mess eh :cry: but she is not done yet so I sent the head off to get the new seat and valve cut in

looks good so far but need alot of grinding smoothing and carving

fast forward 2 hours or so :burnout:you get this

Well now it look like it was never cracked :: rave ::



sure I could have replaced the head but were is the fun in that


time for some :beer::drink1::: alky :: and then maybe some ::hooters:: at the bar



then once I send it back to get the final plain done I am going to cc the head

 

[Turbo Habanero]

wish i could do some work like that. i would have just put my head down in shame and shook it as i walked out the garage cursing

Really impressive work. Great job

 

[te72]

Looks good man, just a bit of touching up/machining and nobody will ever know.

 

[OfnaRcR4]

Really impressive work. Great job

 

[IJ.]

Is it just me or are all of you blind? :nono:

Prediction: It'll crack either side of the weld the 1st heat cycle....

I only say this as to repair that properly would mean preheating the head to 500c before welding and milling to the full depth of the crack this in turn would make the head T0 (soft) so it would need to be reheat treated and to do this ALL the steel parts need to be removed/replaced.

 

[Devin LeBlanc]

Could have just gotten a head at the junk yard for 40.00 lol

 

[suprarx7nut]

I had a much smaller crack than that and decided to have it cut in half. No joke.

Good luck, but I think IJ is right. That wont last.

 

[mk3_7m]

Best wishes to you, Hope to God that wield was enough >.<.

Finding a 7m for me is getting harder as time flys. I wonder what it would take TMC to reman one for me XD.

 

[jetjock]

Is it just me or are all of you blind? :nono:

Prediction: It'll crack either side of the weld the 1st heat cycle....

Not all of us. Some just decided to keep it to ourselves and wait for the results

 

[te72]

Ian, I said it *looks* good, but I'm still excited to see how well the repair holds up. I've been impressed before.

That said, I definitely wouldn't be doing this myself, this is some pretty brave territory... Good luck Nash!

 

[NashMan]

well the sprint car's motor crack has not returned and that gets shit kicked all season long

this was done properly and with the right rod and very common at a head shop

I have no worries Ian I have scene fixed cylinder heads pumping 1000 blown horsepower and they hold up
for how long who knows but for the life of this cylinder head it will be good to go

just an idea these guys are crazy only do there own heads thou
http://www.weldingtipsandtricks.com/welding-aluminum-cylinder-heads.html


oh I all so found out how toyota's heat teating take's place it's rather fast and simple and this was done wiht my head as well when it was fixed

http://ip.com/patent/US4695329

 

[CT26smoker]

I applaud you NashMan,
A lesser Supra owner would have trashed the 7M in favor of a smaller 1JZ, or a chevy.......

 

[A. Jay]

<more blatant IJ brown-nosing> What's wrong with a Chevy?

 

[SupraBro]

The one part of the 7m i would not take a chance with is where the head meets the block...just saying, but very nice work and good luck to you sir!!

 

[NashMan]

^but it is done all the time and hopefully done properly

i hate to say this but this is not a new thing that just came out of thin air

 

[clos91T]

I've seen this done on a bb chevy head, 1300 hp injected alcohol engine. as far as i know its still running, been three years. Anyways good luck to u Sir.

 

[GrimJack]

Given that Ryan's average annual mileage on the Supra doesn't usually make double digits, this should hang on for years.

 

[IJ.]

Given that Ryan's average annual mileage on the Supra doesn't usually make double digits, this should hang on for years.

 

[NashMan]

hahahaha dave and ian it's so ture


lol

 

[te72]

Given that Ryan's average annual mileage on the Supra doesn't usually make double digits, this should hang on for years.

Seems that every other badass 7m I know of is like this. Rebuild, enjoy, destroy, and repeat as needed. It's like laundry, really...