Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

LinkBack Thread Tools Display Modes
Old 03-17-2016, 12:58 PM
Registered User
Join Date: Nov 2015
Location: Lacey Wa
Posts: 90

I have been slowly working on my 85' 300d turbo, converting it to a 4 speed as time and money allows. I have been reading about the differences between a 240d flywheel and a 300d flywheel. From what I have gathered the 300d flywheel just looks thicker, and has 10(?) more lbs to it.

I have a full machine shop in my garage, is there any reason why I can't just machine a 10lb ring and bolt it to the flywheel prior to balancing? This was just an idea I had in my head so it's not like I'm running out to go get material for this, it's more of a discussion about the topic.

I understand I can just buy a flywheel, but these kinda projects are why I have a machine shop. Also the cost of the correct flywheel is more than I paid for all the other parts of the conversion combined, 240d flywheel included.

My idea was to find someone with the 300d flywheel and get a correct weight, and size.

What are your thoughts? I searched and couldn't find another thread on this topic.

Reply With Quote
Old 03-17-2016, 01:01 PM
t walgamuth's Avatar
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 35,953
You could add a ring. I'd use locating pins in addition to the bolts though to get an accurate placement.....or you could do a lap and do a shrink fit.
[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.
Reply With Quote
Old 03-17-2016, 01:14 PM
BirthdayBenz's Avatar
Registered User
Join Date: Feb 2015
Location: Greenville South Carolina
Posts: 321
I just bought one for my swap. I imagine it should be here in a week or so. It was expensive :-( , about twice as much as I've got invested in the OM617. Let me know what other specs besides the weight you want off of it, and I'll be glad to provide them.
Reply With Quote
Old 03-17-2016, 02:29 PM
Mölyapina's Avatar
User title not in use
Join Date: Oct 2012
Location: Chelmsford, Massachusetts
Posts: 4,367
I also have one left in my garage, be happy to measure that this weekend if you want.
"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes

1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."
Reply With Quote
Old 03-18-2016, 05:26 AM
Registered User
Join Date: Dec 2005
Location: Carson City, NV
Posts: 3,789
I have the 240D flywheel, and I've been using it behind a 617 since 2010. I think of it as the "race spec" flywheel for a 300D. Less rotating mass means faster acceleration. There's a slight penalty in that you get some vibration at high engine load combined with low vehicle speed. Easy fix is you wait a little longer to shift. I don't generally use 4th below 45 mph unless it's downhill. I also don't use 3rd below 25-30 mph. The vibration issue is absent in 1st and 2nd.

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 367,xxx miles
08 Triumph Street Triple 30,xxx miles, lowered 10mm in front, Pirelli Angel GT tires, EBC HH brake pads, otherwise stock.
88 Jaguar XJS V12 93,xxx miles. I should be in the garage now.
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 02:51 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page