7MGTE and 7MGE engine blocks ???????????

Takahashi_46 · 03-08-2006, 10:48 AM

i was asking some of the shops the same questions and they told me that i can have the squiters and the holes for the oil put in if i take the block to a machine shop is that true and if it is do any of guys know about how much that would cost. also i heard that the oil pump is different but i can that oil pump of the turbo motor right? thanks guys

rnoswal · 03-08-2006, 03:29 PM

For some reason, I understand that the connecting rods are the biggest difference. I don't know why, but I understand that they have oil holes in them to lube the underside of the piston. I understand why, but I had a 22R Celica engine and the rods had those holes, so I don't know why they would exclude them from the N/A engine. I really don't know, but I heard that and if so that is a major difference. The other part about the different oil galleries I don't think are true. I know the block has a few plugs in the oil gallies and one is for feeding the turbo. There is a return plug in the oil pan already, at least on my 87 N/A. I also believe the pumps are the same but that is easily found out by asking to get the part numbers and see if each calls for a different number or not, I guess the same with the rods for that matter.

I can see rods being different but not a whole block, but Toyota does have a lot of money to spend on these things so maybe someone else knows for sure.

Russ

Takahashi_46 · 03-08-2006, 09:42 PM

o so the oil holes are not on the block they are on the connecting rods. could i just buy the robs and have them installed? and what would happen if ran my engin with out these extra oil parts what if i just ran the turbo with the regular n/a block? would i blow my motor or would it not make that much of a difference. And another question would it just be easyer to just do a full motor swap from the turbo to the n/a motor?

mrnickleye · 03-09-2006, 02:03 AM

Check the FAQs section for the thread on 7mge to 7mgte conversion. Much of the above dialog/posts have some errors and omissions.
i.e.: all connecting rods in every engine have holes in them to squirt/release some oil to lubricate the cylinder walls...true.

rnoswal · 03-09-2006, 06:26 AM

Well I was curious about the extra oiling, so here is part of an article that mentions that.

"The turbo unit is a Toyota-made component with a mechanical wastegate that limits maximum boost to 6.8 psi. To help control heat buildup, both coolant and engine oil are circulated through the housing. The presence of an air-to-air intercooler -- also a first for Toyota -- enhances the density of the incoming charge. To further assist heat dissipation, the Turbo model is also fitted with a remote oil cooler and has individual nozzles in the cylinder block that spray oil on the piston skirts. The cam timing has been tweaked a trifle. The only other significant internal change is the installation of a new set of pistons, which lowers the compressions ratio from 9.2:1 to 8.4:1."

So there you go on part of the differences.

Russ

Takahashi_46 · 03-09-2006, 06:35 AM

thanks russ for the artical. So would it be easyer to just do a full motor swap from a turbo to a N/A instead to having the block machined and all that. Also if thats the case is the wireing harness the same?

rnoswal · 03-09-2006, 06:42 AM

I think there are differences, like 2 knock sensors, boost sensors and I think an even different air flow meter. I know my N/A and turbo 87 models have different afm's. Just to name a few. I know there are more in depth postings here somewhere.

Russ

Takahashi_46 · 03-09-2006, 06:45 AM

Just FYI the reason i posted the tread is because i have a black 91 MKIII N/A and i was rebuilding the motor when my house got flooded out (I only had the car 2 weeks and the valve stem broke i was told it was due to overheating thats why the rebuild). The water was half way up my door and my interior is messed up. so i was looking for another shell, i found one for 1500 its a 91 turbo MKIII but the guy broke one of his piston rods. So i was asking about the blocks. what do you guys think about buying his shell? the car is in great shape just the block is messed up. help about this much appreciated. thanks

Isphius · 03-09-2006, 05:13 PM

the wiring harness and ecu are different. there shouldnt be any problem usign the n/a block at low boost...as long as you get an oil cooler. ive also seen seperate oil coolers/tanks for superchargers, maybe you could use one of those? it comes with lines a cooler and a pump. that way you never even need to tap into the block or heat up the engine oil. also the lower compression pistons help a lot to prevent detonation. about 8:1 would be perfect if you can find those. Im sure the motor doesnt have an oiling problem, my motor has 186k miles on it and it still has about 28-30 psi of oil pressure once its warm. lol.

03-09-2006, 02:03 AM	#4
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	Check the FAQs section for the thread on 7mge to 7mgte conversion. Much of the above dialog/posts have some errors and omissions. i.e.: all connecting rods in every engine have holes in them to squirt/release some oil to lubricate the cylinder walls...true. __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08.

03-09-2006, 05:13 PM	#9
Isphius 500whp yet? Join Date: Nov 2005 Location: Long branch, NJ Posts: 1,006	the wiring harness and ecu are different. there shouldnt be any problem usign the n/a block at low boost...as long as you get an oil cooler. ive also seen seperate oil coolers/tanks for superchargers, maybe you could use one of those? it comes with lines a cooler and a pump. that way you never even need to tap into the block or heat up the engine oil. also the lower compression pistons help a lot to prevent detonation. about 8:1 would be perfect if you can find those. Im sure the motor doesnt have an oiling problem, my motor has 186k miles on it and it still has about 28-30 psi of oil pressure once its warm. lol. __________________ Yay the supra assistant is gone!!! WEEE!!

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03-08-2006, 10:48 AM	#1
Takahashi_46 Stock Join Date: Mar 2006 Location: Honolulu,Hawaii Posts: 21	i was asking some of the shops the same questions and they told me that i can have the squiters and the holes for the oil put in if i take the block to a machine shop is that true and if it is do any of guys know about how much that would cost. also i heard that the oil pump is different but i can that oil pump of the turbo motor right? thanks guys

03-08-2006, 03:29 PM	#2
rnoswal Lexus & 550's Join Date: Apr 2005 Location: Bossier City LA Posts: 556	For some reason, I understand that the connecting rods are the biggest difference. I don't know why, but I understand that they have oil holes in them to lube the underside of the piston. I understand why, but I had a 22R Celica engine and the rods had those holes, so I don't know why they would exclude them from the N/A engine. I really don't know, but I heard that and if so that is a major difference. The other part about the different oil galleries I don't think are true. I know the block has a few plugs in the oil gallies and one is for feeding the turbo. There is a return plug in the oil pan already, at least on my 87 N/A. I also believe the pumps are the same but that is easily found out by asking to get the part numbers and see if each calls for a different number or not, I guess the same with the rods for that matter. I can see rods being different but not a whole block, but Toyota does have a lot of money to spend on these things so maybe someone else knows for sure. Russ

03-08-2006, 09:42 PM	#3
Takahashi_46 Stock Join Date: Mar 2006 Location: Honolulu,Hawaii Posts: 21	o so the oil holes are not on the block they are on the connecting rods. could i just buy the robs and have them installed? and what would happen if ran my engin with out these extra oil parts what if i just ran the turbo with the regular n/a block? would i blow my motor or would it not make that much of a difference. And another question would it just be easyer to just do a full motor swap from the turbo to the n/a motor?

03-09-2006, 06:26 AM	#5
rnoswal Lexus & 550's Join Date: Apr 2005 Location: Bossier City LA Posts: 556	Well I was curious about the extra oiling, so here is part of an article that mentions that. "The turbo unit is a Toyota-made component with a mechanical wastegate that limits maximum boost to 6.8 psi. To help control heat buildup, both coolant and engine oil are circulated through the housing. The presence of an air-to-air intercooler -- also a first for Toyota -- enhances the density of the incoming charge. To further assist heat dissipation, the Turbo model is also fitted with a remote oil cooler and has individual nozzles in the cylinder block that spray oil on the piston skirts. The cam timing has been tweaked a trifle. The only other significant internal change is the installation of a new set of pistons, which lowers the compressions ratio from 9.2:1 to 8.4:1." So there you go on part of the differences. Russ

03-09-2006, 06:35 AM	#6
Takahashi_46 Stock Join Date: Mar 2006 Location: Honolulu,Hawaii Posts: 21	thanks russ for the artical. So would it be easyer to just do a full motor swap from a turbo to a N/A instead to having the block machined and all that. Also if thats the case is the wireing harness the same?

03-09-2006, 06:42 AM	#7
rnoswal Lexus & 550's Join Date: Apr 2005 Location: Bossier City LA Posts: 556	I think there are differences, like 2 knock sensors, boost sensors and I think an even different air flow meter. I know my N/A and turbo 87 models have different afm's. Just to name a few. I know there are more in depth postings here somewhere. Russ

03-09-2006, 06:45 AM	#8
Takahashi_46 Stock Join Date: Mar 2006 Location: Honolulu,Hawaii Posts: 21	Just FYI the reason i posted the tread is because i have a black 91 MKIII N/A and i was rebuilding the motor when my house got flooded out (I only had the car 2 weeks and the valve stem broke i was told it was due to overheating thats why the rebuild). The water was half way up my door and my interior is messed up. so i was looking for another shell, i found one for 1500 its a 91 turbo MKIII but the guy broke one of his piston rods. So i was asking about the blocks. what do you guys think about buying his shell? the car is in great shape just the block is messed up. help about this much appreciated. thanks