BMW M70 Engine Rebuild

Jason C · 06-10-2005, 10:37 PM

http://bmwe32.student.utwente.nl/sea...0rebuild_1.htm

Fascinating series of photographs with captions. Only nitpick I have is that there was a lot of cleaning and polishing, but (apparently) less measuring done than I did with a Chrysler 2.0 4-banger.

Also amusing was his decision to use a *real* engine, only to find out that (surprise!) "...the v12 hardly fits under the hood. The v12 is high, very high. Much higher as the plain american 90 degree V8. I figured I would have lots of space underneath the hood, but that was a mistake."

Still, a great site depicting just another backyard project.

lip277 · 06-10-2005, 11:54 PM

That is really interesting.

In an odd way - It just reinforces my decision to get a V8 (740 or 840) instead of the V12 (750 or 850).

I've followed along with several folks that have been dealing with 'issues' on their V12's that would have had me sell the car. The V8's aren't perfect by any means, but at least there is only 'one' of something.

I ended up with the 740i as a result.

Still - Very interesting.
Thanks

Fair! · 06-11-2005, 01:31 AM

The BMW V12 is a clutserf**k of an engine that is far too big, costly, complex, and underpowered to ever bother "rebuilding". Costs of a V12 BMW rebuild can top $20,000.... yes, twenty large. And did I mention they post weak power numbers?

This big boat engine belongs in something like the Speed Racer MEGA CAR. At least the newer BMW V12 makes over 400hp, N.A....

The old 4.4L BMW V8, also a mammoth engine but to a much larger extent, makes good grunt and can last a long time. My 1998 540 has 120K miles and still puts down 267 rwhp, with nothing but exhaust mods.

My next daily driver will be a 1998-2000-ish 740i with the same 4.4L V8.

Can sound unbelivably good and run extremely well, with the right tweaks.

06-10-2005, 10:37 PM	#1
Jason C Carmudgeon Join Date: Jul 2004 Carmudgeonly Ride: Invalid Carriage Location: Bay Area, CA Posts: 1,932	BMW M70 Engine Rebuild http://bmwe32.student.utwente.nl/sea...0rebuild_1.htm Fascinating series of photographs with captions. Only nitpick I have is that there was a lot of cleaning and polishing, but (apparently) less measuring done than I did with a Chrysler 2.0 4-banger. Also amusing was his decision to use a real engine, only to find out that (surprise!) "...the v12 hardly fits under the hood. The v12 is high, very high. Much higher as the plain american 90 degree V8. I figured I would have lots of space underneath the hood, but that was a mistake." Still, a great site depicting just another backyard project.

06-10-2005, 11:54 PM	#2
lip277 The old cranky SOB.... Join Date: Oct 2003 Carmudgeonly Ride: several cars... way too many.... Location: Near Seattle Posts: 4,798	That is really interesting. In an odd way - It just reinforces my decision to get a V8 (740 or 840) instead of the V12 (750 or 850). I've followed along with several folks that have been dealing with 'issues' on their V12's that would have had me sell the car. The V8's aren't perfect by any means, but at least there is only 'one' of something. I ended up with the 740i as a result. Still - Very interesting. Thanks __________________ *Kevin* 1970 2800CS - - 2001 740iL - - 2006 997.1 - - 2012 Escalade 1968 Mustang GT Convertible - - 2003 Ford F250 PSD - - 1985 728i

06-11-2005, 01:31 AM	#3
Fair! Realist Join Date: Jun 2005 Location: Plano, Texas Posts: 78	The BMW V12 is a clutserfk of an engine that is far too big, costly, complex, and underpowered to ever bother "rebuilding". Costs of a V12 BMW rebuild can top $20,000.... yes, twenty large**. And did I mention they post weak power numbers? This big boat engine belongs in something like the Speed Racer MEGA CAR. At least the newer BMW V12 makes over 400hp, N.A.... The old 4.4L BMW V8, also a mammoth engine but to a much larger extent, makes good grunt and can last a long time. My 1998 540 has 120K miles and still puts down 267 rwhp, with nothing but exhaust mods. My next daily driver will be a 1998-2000-ish 740i with the same 4.4L V8. Can sound unbelivably good and run extremely well, with the right tweaks. __________________ Terry Fair - www.vorshlag.com 97 M3 (STU class), E36 LS1 (XP class), other BMWs