crank stamp..

[heavyd]

why is my crank stamped 2m when its a 5mge crankshaft? and how come it doesnt have the old school toyota emblem thing on it like every other stock part does

http://photobucket.com/albums/a324/heavyd_/?sc=1&multi=4

[Chris Sullins(STIX)]

When i did mine i was wondering the same thing.. :confused: Oh well as long as it works,Im good.. :woot:

[zank]

I bet Uncle Eng will post in 5.....4.....3.....2.....1............ Dammit where the hell is he?

[williamb82]

repost. do a search. same reason the 6m crank is in the 7mge, its just a part number for the crank.

[dulobast25]

alright people, heres the story, the "2m crank came fromt he "2m" engine and hasnt been changed since until the "6m"
So yes if you have an early 5m your crank is the same one found in the toyota 2000gt. the engines gos as follows:
m,2m,m-te,3m,4m,4m-e,5m,5m-e,5m,ge,6m-ge,7m-ge,7m-gte.

so the engine went from 2000cc sohc to 2000cc dohc to 2600cc sohc to 2800 sohc to 2800 dohc to 3000 24v dohc.
the stroke on the inline six m series engien hasnt changed since the 2m and maybe inplies there was a plain "m" crank at some point..overa placing 3 cranks over the life of the m engine..that is until the lat gen of 7m where the crank was re-counterbalanced.

Do the research folks.

[williamb82]

sorry, but the 2kgt got a 3m, not a 2m. go read up on your history.

[SilverMk2]

Doesn't matter 2,3,4,5Ms all use the same 85mm stroke crank

[Junkie]

Ahhh,but the early 82 and earlier,some 83's had a smaller #1 main bearing.BTDT just this summer.

[dulobast25]

sorry, but the 2kgt got a 3m, not a 2m. go read up on your history.

"repost. do a search. same reason the 6m crank is in the 7mge, its just a part number for the crank."

Nobody asked you to tell us what engine the 2000gt had..that wasnt the question. Were talkign cranks. Second the "2m" isnt a part number. you should know that most if not all toyota part numbers are 5 digit-typhen-5digit sequence. I'm sure you know that. Its simply a casting showing which stroke/block the crank was meant for at the time of production or casting. An to answer the original question the 2m is still there becasue toyota at that time hadnt changed the crank for your application until the crank was upgraded.

A correction on my part. the 2000cc "m" and all m-b, m-d, etc shared the m crank, while when the disp changed to 2.4 liters the m became the 2m while another version remain 2000cc and with a twin cam head became the 3m. so the m and 3m share the same crank, the 2m,4m adn early 5m share the same crank from the 2m and was unchanged until toyota was preparing to make the 6m. and that crank was in the 6m and then with a 24 valve head became the 7m and remain unchange until toyots decided to redesign the crank once more creating the counterbalanced 7m crank. (i hear late 5mge cranks are 6m diameter, but i dont own one so i'm not sure)

[doug82supra]

And although I know I've read it but can't find it on search, the lower timing cover on the 86 Cressie 5mge I'm replacing seals on has 6m stamped on it under the crank pulley. Just a commonly shared part?

[MikeMac]

Well Ladies and Gentlemen, I would like to continue this thread since it was going in the right direction but stopped... My question is this, I have a '86 Cressy 5MGE (I don't know anything about this engine except it doesn't have a TPS, it was removed before I got the engine out of the vehicle at Pick and Pull) and would like to know if the crankshaft from that engine will fit into an '84 5MGE (it has a bad crank pulley key way and a bad front main bearing). I read that there is a difference in the bearings for engines made prior to 7/84 and those made after 7/84, is this difference due to the block configuration or due to the crankshaft configuration and if the switch can be made what type of bearings do I use the ones for the prior to 7/84 block or the ones for the post 7/84 Crankshaft??
BTW I have tried to search for the answer but it is very difficult to get this information unless the specific question is asked about the 84 block and 86 crankshaft.

[Road Ripper]

Cranks are the same, bearing dimensions are the same, but the little tab on the bearings to keep them from spinning was moved, so that is the difference. You could just buy the bearings for both years, wait until you get the engine apart to see what you have, and return the set of bearings you don't need.

[MikeMac]

Thanks Road Ripper, that is about the best news I could have hoped for. Good idea about returning one set of bearings. Now I just have to get the courage to crack her open, well opening isn't the hard part it is getting her back together correctly that is going to be tough...LOL. Thanks for the information, it certainly helps.

[Tanya]

Difference is that the later model blocks, 84 and up, take a wide #1 main bearing, the earlier ones are narrow like the rest of the mains. Also I believe the bearing tabs are on opposite sides, I can't remember...

[MikeMac]

So Tanya, you are saying that the block determines what set of bearings are needed? But the difference was the 7/84 date of engine build so I thought that indicated a 1985 model year change to the 5MGE. Basically then I need to look at the #1 bearing to see what it is: wider than all of the rest and that will indicate post 7/84 bearings needed or the same as all the rest and that will indicate prior to 7/84 bearings are needed?? Thanks. That is what I like about this forum: everyone has their own little areas of expertise and many are knowledgeable in many facets, I hope to get there one day. Thanks again.