?Rebuilt Motor Help!!!

[cre]

Originally Posted by mirage83

I don't remember how many of them attempted the repair with the head still on the engine though.

A few, the rest learned from their mistakes.

[Raysupra]

well Im a Marine So I mean I can Buy what I need... Im not rich but I do pour my heart and soul into this car.. lol Its my shitty car dream.. and the car just needs to be put into my garage and Rebuilt ground up.. the harness scares me suspension blow.. rear calipers seized I just redid the Brake lines cause they were rusted.. new interior redid the guages, snapped the speed cable due to the line holding the cable Broke and was bending the cable
Its a Good motor just Every small thing that could need replaceing Does.. haha... I think the tranny has a Leak?

Ok Well I look at it this Way my Subframe Fits a 1jz 90 7m my friend has a 89 and basically Told me all the wrong things he did.. and helped me plan out my swap. If I do a swap basically everythings Compatible BUT Id need to rig up something for the intercooler and Exhaust... other than that its straight Forward buy the motor... and some general stuff Timing oil oilfilter and hopefully the coils are good. then just hope the new one has powersteering for comfort and call It good for 6-8 months till I can Redo all the cooling and breathing factors of the motor... Im looking at these numbers

around 1500-2000$ to Fix My current nightmare... or b 2600 to get the 1j in and maybe another 5-600 to get a custom exhaust and intercooler I found a intercooler for 100$ new from a buddy for a 1j and I can Make my own Exhaust the weekend after the swap I know a Fab shop has tons of extra piping.. Cut weld my own 3" up call It all A Great cheap quick job put a bic and Tip on it later.. .

Im just really stuck... I think my car is getting like 12mpg with no turbo llol plus I have NO power its annoying... I can take out a small Loan To get one or the other project started... btw this is my First supra and wont be the last hopefully a mk4 will come in 3-4 years ill buy something more complete lol not a halfway shitty project car..

thanks alot for the help so far you both have given me some things to think over I know Those Studs Are notorious for probs I can look at them and play around with my manifold Im 100% sure its leaking at the block I felt around.. Its been driven like that for awhile... not Too long ... one oil Change?heh .... wasn't worried I was thinking I would swap the motor.. btw i'd rather just buy a new turbo if i was to keep the 7m

[Green7mgte]

my 7mgte also has an exhaust leak. after the head was rebuilt I had just about everything in place and realized i had a stripped and F that noise of Undoing all the work. an exhausting 3 days. so I came up with a solution of getting a concrete lag bolt that would seal up my hole. either that or remove the head, tap, re assemble. which im prolly going to do anyhow. but with the lag bolt I would not need to remove my entire head. sorta a quick fix.

a side note.. exhaust leaks left unchecked will burn up the head and valv cover gaskets over time. my 2 cents on the rebuild or swap. the break down and repair of your 7m will be time consuming, expensive. I would suggest checking the integirity of the remaning moter to even see if its repairable then make a decision. think of what is going to be needed in the rebuild and assign it a value based on how important it is to you. the higher the importance the higher the number.. Money, is this important? if so assign it a high number. time? how important is that.. assign it a number.. (1-20 works) manual labor.. things of this nature. now do it for the 1jz swap and see wich has the higher numarical value. go with the lower one.

[Raysupra]

Originally Posted by Green7mgte

think of what is going to be needed in the rebuild and assign it a value based on how important it is to you. the higher the importance the higher the number.. Money, is this important? if so assign it a high number. time? how important is that.. assign it a number.. (1-20 works) manual labor.. things of this nature. now do it for the 1jz swap and see wich has the higher numarical value. go with the lower one.

Thanks good idea... my 7m will needs too much... im about 80% sure a new motor is the solution and ill look at your quickfix... after i look at my leak.. its so annoying... My old Turbo burnt up... I was running it at 12 psi... Could it burnt up of lack of oil or something?? I heard ppl running them at that and though wouldve been ok.. it was rebuilt had 5k on it...

[Raysupra]

yea everything was stock.. Good solid 40 oil pressure.. but maybe it wasn't breathing enough or the oil line got a clog in it or isnt flowing enough?... who knows i pushed it hard and it said f me haha ..get treated how you treat

[Green7mgte]

TURBO UPGRADE: The factory turbo is able to run boosts up to 14 psi (1 bar). Trying to boost above this is plain useless. . For anything over 14 psi a new block with forged pistons is necessary.

found that.. so 12 psi should of been fine.
http://www.toysport.com/technical%20...tech_notes.htm
thats were i found it. just a little lite reading about different things.

[cre]

12psi is fine, unless you have a boost leak it would still be within the turbos efficiency window. After 14 to 15 psi the turbo pushes more hot air than anything and it's well beyond the capacity for most intercoolers to make up for. If you had a boost leak you could have easily over worked the turbo.

From what I've seen even 1JZ's advertised as rebuilt that sell for around $1K are often in sad shape... Used is still, afterall, used. I really don't think you understand entirely what's involved in the swap or have an unrealistic view of the entire scenario. I've yet to read reports from someone who said it was cake and went without a hitch and only took three days as planned. It's your car though, so have at it. You'll find there is a section over at www.supramania.com specifically for MKIII swaps such as the 1JZ, 2JZ and 1UZ where you'll find a great deal of information and advice. You should check it out.

Good luck!



Green, just from skimming it, that site's a little dated... as a community we've learned much since. Much like the SOGI site, it's a good reference for some basic info, but isn't a good source of current and up to date information. The details about 16psi warping the head is garbage, N/A cams have been proven to cause an overall power LOSS, they are NOT a good high-rev engine (tend to grenade much past 8000RPM unless destroked, from what I've read). There are MUCH better, up to date references online if you look around.