When I had a 240D with the stock 28 lb flywheel, it was very smooth at all times, and I don't think it left much room for improvement. I used the same flywheel on my 300D, and it has some pretty noticeable vibration with some combinations of speed and load, but this is easily managed by shifting a little later.

__________________
Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.

That mysterious vibration with a lot of conversions using the 240 flywheel has always made me wonder. There are more firing strokes and the displacement of each piston is the same I think.

I thought the 38# flywheel was heavier to offset the extra (5th) cylinder, rotating mass. It seems it was mentioned to put the heavier 5 cylinder 38# flywheel on a (616)4 cylinder motor ...is that correct?

MACDOE---- The 38# FW if for the 617 engine to make it run smoother. It has nothing to do with what ever Transmission is hung on the back end.

Flywheels sourced from PNP are $27 plus the tax & enviro fees.

Our 80 240D runs just fine with the stock 28# FW.
This is the first thread I read anything about using the 38# FW in a 240D, don`t see what that would accomplish.

I did notice when I installed the 28# 240D FW in the 85 300D when I swapped in the 4-spd manual, there is a vibration noticed when I would slow down in 4-th below (say) 27 - 2800 RPM`s. that was some where around 50+ MPH. Dropped it into 3rd and it ran smooth. never noticed the vibs in 1st thru 3rd gear.

I have the 38# FW to install when ever I get off my Butt and quit procrastinating about what project to get to first or finish up on. I have 7 vehicles, and only one running. Thinking about it doesn`t get anything done.
HMMMM.....if I go to PNP today I can get to the projects tomarow..........

As Skippy said........
"I used the same flywheel on my 300D, and it has some pretty noticeable vibration with some combinations of speed and load, but this is easily managed by shifting a little later."



Charlie

__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

I edited my post to remove the 5 speed transmission bit, to avoid confusion. I agree that the transmission does not care what flywheel is on the engine. My point was that the engine probably does care in terms of vibration. I thought the 38# flywheel came with the 5 cyl. and the 28# with the 4 cyl.(616) in the 240d. I was confused when you say that the 38# will fit a 616 which no doubt is true but why would that even be considered to be fitted since the 38# is heavier for the extra 5th cylinder and the 616 is a 4 cylinder (240d)?

Is'nt the vibration problem due to guys using the 240d parts including 28# flywheel on their 5 cylinder engines when in fact the 38# flywheel is suppossed to be on the 5 cyl. for a manual tranny. I understand that guys use the lighter flywheel for lack of having the 38#er due to its scarcity.

I think the only way you can get a 38# flywheel is by finding a euro import over here (what Clacker has done) or ordering a new one from Germany, which is why they are so rare and sought after. They are the proper part for the 5 cylinder engine/manual tranny combination that every one wants to have.

Clacker...did you get it yet? That car is like finding a needle in a haystack... or winning a small lottery. I guess it depends what you have to pay. If the rest of the car is as bad as you say it is you may get it for cheap.

I found a 4 speed manual 300D from Germany in one of our prairie provinces and got the whole car for 300 bucks. It should have the 38# flywheel. I did'nt say or post anything about it until the car was in my possession for fear someone would scoop it from under me, also why my location is vague. These are very sought after, especially by the guys on this forum.

True the firing strokes are more frequent on a five cylinder, but the crankshaft is one cylinder longer, allowing for a bit more flex. Also, an inline five has free moments of the first and second order that an inline four does not.

Read:

Engine balance - Wikipedia, the free encyclopedia

Straight-five engine - Wikipedia, the free encyclopedia

__________________
Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.

I don't understand the terms used but will say the the five cylinder engine has a definite hop at idle that a four or six does not have.

__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

"I was confused when you say that the 38# will fit a 616 which no doubt is true but why would that even be considered to be fitted since the 38# is heavier for the extra 5th cylinder and the 616 is a 4 cylinder (240d)?"



Macdoe...... I have the 30# FW to install, but not in the 240D. this is going into the 85 300D to replace the 28# FW.

I re-read what I posted, and sounds like it was going on the 240.

Looking at the two FW`s side by side, that 30#er is one big heavy sucker.
weigh`s 1/2 as much as a 240D 4-spd manual transmission.

Now maybe if the 240 had a Turbo, that would speed up things?
I might have a 240D Turbo set up to buy next month, well know later when I go up to Portland, Or. (Daughter is having a boy) bought a Nissan Diesel eng off CL. the guy has some MB`s and extra stuff to sell, and has a brand new after market 240 turbo assy. well know in a couple weeks, almost forgot the guy had it, thanks for reminding me.

Charlie

__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

Hey Charlie, sounds like you are a busy man....is this the one that transforms you into a Grandpa?

I wonder if we will ever hear from Clacker again? on whether he got this or not.

The euro manual car I found was originally thought to be a five speed until the guy checked....he counted reverse as a speed, so it turned out to be only a four speed. I was excited to find a fiver until he checked it out.

I found the addvertisment for the car Clacker found. It is hard to tell if the guy knows just how rare the car is, although he does list it as "rare 5 speed"
there is no price, just taking offers. There are only 2 pics and they are from far away. It looks like the car has the euro bumper and definite euro headlights so it could be the real deal. Looks like a dark emerald green, which I have never seen before.
I wonder how many 5 speeds there really are in North America? I guess, Less than 50???