6M blocks have clearances cast into the block for the rods and thats about the only difference. 7MGTE have also the oiling ports for the turbos cast in. There are also two different 7MGTE blocks early and late.

 

late 89 the crank changed to fully counter balanced, and redline droped to something like 6250rpm. I think...

 

Block, Crank, Block, Crank, Block, Crank.

1st prize goes to MKIIdrifter for regurgitation of info not asked for.

5m definately does not have clearance that the 7m's have. ...mainly on the inside of the block, where the accessory bracket taps are.

--billyM

 

late 89 the crank changed to fully counter balanced, and redline droped to something like 6250rpm. I think...

Mid 1990 models seems to be the concesus on supra forums.

Obviously the 7mgte block has holes in it for the oil lines on the turbo. 7M blocks have extra holes for the mk3 engine mounts, and they also have 2 holes in completely different spots for the knock sensors (pretty sure the 7mge has 2 as well).

If you have any other questions nows the time as I have 3 7mgte blocks spread out over my shop floor and a complete 5m in the corner and my buddys 7mge down the road on an engine stand.

 

Thats why I said I think,
and as fare as you billy whatever I can do to help :new_mofug :good:

 

i have a late 89 7mgte, its the 6m crank. i got a 91 7mgte and it has the 7m crank. my 87 and 88 7mgte's both had 6m cranks as well. also, the 91 block felt heavier then the 88 block, but i havent had time to compare side by side yet to see if there is any extra ribs or anything in it or weight them. i have both blocks completely bare. so will wiegh them when i get a chance.

 

The later 7m blocks have different freeze plug and knock sensor configurations and around the oil pump mounting flange is a little different for the crank throws. The rest of it looks pretty much the same IIRC.

 

Curious.... thought the 6M and 7M cranks were nearly identical but not. Could I possibly be wrong???

<-----------------Mr. Technical Guy

 

Curious.... thought the 6M and 7M cranks were nearly identical but not. Could I possibly be wrong???

<-----------------Mr. Technical Guy

I belive the 6m cranks only had counterweights on every other rod journal, and the 7ms had counterweights for all rod journals.

 

http://www.jblmk3.com/id145.htm

 

I believe the 82 and 85 oil pumps where different as well. I am actually going to try and check on this as I don't remember for sure. I had to use the 5mge oil pump put of my friends 82 along with the pickup on his 6mge. But I don't remeber having to do that with mine I thought all I used was the pickup tube and not the pump I thought I threw that away.

 

85 oil pump and pan are deeper then the 82. i think 82-83 got the same pan/pump and 84+ got the deeper units.

 

85 oil pump and pan are deeper then the 82. i think 82-83 got the same pan/pump and 84+ got the deeper units.

Is this one of the few reasons why we need an 85 pan for the 7mgte conversion.

 

Thanks so far.

Anyone got anything else about the blocks?



Seamous: you got a use for all of those 7m blocks?

 

but of course

 

i have a question about the 6mge block. could you put a 7mgte crank and rods into 6mge block?

 

the 7mgte and 6m cranks are the same specs, so are the rods techniclly, though the 7mgte rods are a lil beefier. and lil devil. the reason you need the 85 pump and pan is cause the 85 pump has the exact same gears internally as the 7mgte pump so has identical flow. the 82 pump and i believer the 83 and early 84 had shorter pumps, and shorter gears so didnt flow as much volume. also, i may get a chance to examine the 89 and 91 blocks side by side wed. if i see anything diff ill take some pics of it. as it is i need to find someone to come get the junk 5m block out of my storage unit so ill have more room.

 

I've read on supraforums that the 7mgte has a much higher flowing oil pump then the 7mge, to accomodate the turbo and piston squirters which makes sense.

 

yeah, it does, take apart a ge pump and a gte pump, and the gears inside the gte pump are taller. and the 85 5m pump has the exact same taller gears as the gte. shawn has confirmed this with side by side comparos.

 

7M-GE's have 1 knock sensor, 7M-GTE's have 2 knock sensors.

The 7M-GE and 7M-GTE had the 6M crank up until 1989, 1990+ models got the newer fully-counter balanced crank. The 6M crank doesn't have counter balances on the number 2 and number 5 cylinders.

The fully counter balanced crank is 5lbs heavier than the 6M crank.

7M-GTE block is tapped for the turbo oil lines, and the oil squirters. The 7M-GTE also has the higher flow oil pump over the 7M-GE (was already mentioned).

I've never heard of the knock sensor arrangement or freeze plugs ever changing on the 7M.

 

How does the GTE knock sensor location compare to the 5m one?

 

How does the GTE knock sensor location compare to the 5m one?

The 5M looks like the 7MGE one, right in the middle. The GTE motor has two, ones around the #2 and the other around the #5 cylinder

 

good stuff

will