FOUND!!! 190D 5-speed. Swap into w123? - Page 3 - PeachParts Mercedes-Benz Forum

leathermang · #31 01-25-2018, 01:08 PM

Quote:

Originally Posted by JB3

Vibration easily solved by match balancing the flywheel with the driven plate. Lot of people made this mistake. 28lb or 38lb, go with what you can get your hands on but mark that driven plate to the crank before you take it off! ......

I am not sure that is correct all things considered but I can't cite the specifics .. except that the manual trans had an ' appurtenance ' attached to its outside..
and a lot of people thought that they had the trick to balancing the flywheel and later sold their cars with the vibrations still there...

JB3 · #32 01-25-2018, 02:57 PM

Quote:

Originally Posted by leathermang

I am not sure that is correct all things considered but I can't cite the specifics .. except that the manual trans had an ' appurtenance ' attached to its outside..
and a lot of people thought that they had the trick to balancing the flywheel and later sold their cars with the vibrations still there...

The trick is match balancing, not neutral balancing. Has to be done properly. Never had a vibration problem on any of the vehicles i converted. An unknown number of 617 cranks are balanced out with the driven plate. Some are neutral, some are weighted.

vonsmog · #33 01-25-2018, 08:01 PM

I have a 84' 280CE with a 5 speed which I swapped in a OM617a into. I sent out the 300D na flywheel I got for it to be matched balance to the auto flywheel off of the motor. When I get it back, it was neutrally balanced just as the auto one was. Motor runs super smooth and it a real pleasure to drive. It still has the 3.58 rearend and pulls great once moving and cruises down the highway with ease. Wish my 300TD was as much fun to drive as the coupe is!

JB3 · #34 01-26-2018, 07:48 AM

Quote:

Originally Posted by vonsmog

I have a 84' 280CE with a 5 speed which I swapped in a OM617a into. I sent out the 300D na flywheel I got for it to be matched balance to the auto flywheel off of the motor. When I get it back, it was neutrally balanced just as the auto one was. Motor runs super smooth and it a real pleasure to drive. It still has the 3.58 rearend and pulls great once moving and cruises down the highway with ease. Wish my 300TD was as much fun to drive as the coupe is!

I wish there was a way to tell from engine code or vin which are not neutral balance. I had the same experience. Converted 4 617s to manual, 3 were neutral, and one was weighted. Im glad i went through the trouble for that one engine, otherwise i would have been screwed. I did not match balance one additional application in a non mercedes chassis using a 617, and ended up with massive vibration problems. Identified that driven plate as weighted as well, but not before i had lost the position reference on the crank.

IMO the flywheel bolt pattern is a serious design flaw. 12 positions. They could have done as other manufacturers do and made the flywheel bolt on there one way and one way only.

moon161 · #35 01-26-2018, 09:45 AM

Quote:

Originally Posted by JB3

I wish there was a way to tell from engine code or vin which are not neutral balance. I had the same experience. Converted 4 617s to manual, 3 were neutral, and one was weighted. Im glad i went through the trouble for that one engine, otherwise i would have been screwed. I did not match balance one additional application in a non mercedes chassis using a 617, and ended up with massive vibration problems. Identified that driven plate as weighted as well, but not before i had lost the position reference on the crank.

IMO the flywheel bolt pattern is a serious design flaw. 12 positions. They could have done as other manufacturers do and made the flywheel bolt on there one way and one way only.

Yeah, I've seen GM flex plates that only go on one way. A regular circular pattern is statically and dynamically balanced, but you'd think that they'd figure out something and use a long compound word to describe it. I think in japanese, 'poka yokeru' is literally 'idiot proof'.

rjz5400 · #36 01-26-2018, 11:36 AM

I know where there is a 616 5speed euro car for sale if that interests you, it has all the euro bumpers and cloth as well.

Search my posts for the info or email me.

Good luck on the search, that 190 is pretty cool IMHO

vonsmog · #37 01-26-2018, 12:39 PM

Quote:

Originally Posted by JB3

IMO the flywheel bolt pattern is a serious design flaw. 12 positions. They could have done as other manufacturers do and made the flywheel bolt on there one way and one way only.

The Mercedes OM352 which is used in the Unimogs are this way, crank bolts only line up one way.

Squiggle Dog · #38 01-26-2018, 04:37 PM

Quote:

Originally Posted by vonsmog

The Mercedes OM352 which is used in the Unimogs are this way, crank bolts only line up one way.

I think the OM603 is the same way. When I replaced the rear crank seal, I noticed there was no need to mark the flex plate because it could only go on in one position.