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OM603 to OM606 Fan Clutch Mod ????
I have 87 300D OM603.
I bought new 98-99 E300 (OM606) fan clutch (because it was $200 cheaper than OM603 version). Will my old metal fan from my 87 work with this OM606 fan clutch? I want to just drop in the fan clutch and use everything else from OM603. Anyone know for sure before I dismantle the car? if it works, it will save OM603 owners $266.
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Paul Benz-less I need an SDL ! Last edited by a2t; 05-04-2009 at 10:26 PM. |
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No, you have to use a plastic fanwheel with the new clutch.
-J
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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E. |
#3
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Are you sure? Look at post #8 and 22. Is he wrong?
http://www.peachparts.com/shopforum/showthread.php?p=1996319 Quote:
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Paul Benz-less I need an SDL ! Last edited by a2t; 05-04-2009 at 09:46 PM. |
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I could be wrong. But I would think that the new clutch isn't designed to deal with the weight of the metal fanwheel. I'll agree with you that the job is enough of a bear you wouldn't want to repeat it.
-J |
#5
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Damn good point. The 606 fan clutch looks pretty massive, but yeah im sure the plastic fan is 3x lighter than metal. Anyone else??
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Paul Benz-less I need an SDL ! |
#6
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This does give me an idea... If someone who may have tried this could tell us. Has anyone who has to drive in hot climates (I mean more than MN on a summer day - think San Antonio, Atlanta or Miami) ever made a direct to the water pump spacer/clutch eliminator for the fan OR installed a flex fan?
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1987 300D (230,000 mi on a #14 head-watching the temp gauge and keeping the ghost in the machine) Raleigh NC - Home of deep fried sushi! |
#7
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In July 2008 I replaced both the clutch and the fan on my 603 with the 606 clutch and plastic fan. Works fine, didn't cost that much. The 606 clutch is very similar in beefiness to the 603 clutch so you could mount the metal fan on it if it were modified but why bother? The plastic fan is lighter and spins more easily.
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"Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970 |
#8
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No Fan Clutch
Sean,
It'd work,But really drag the engine especially @ Hwy speeds (MPG suffer) AND put excess wear on the whole Serpentine Belt Drive System. I'm surprised you haven't gone to Evan's Waterless Coolant (Much cooler Operating temps [up to 10Fcooler],even under extreme Load/Heat conditions) It does not "Pressurize" the system like water based coolants. (You would want to plug the H2O pump's weep holes with "Something" [RTV?] and also seal off the Overflow Tank Exit [in the passenger side Fender.]The Evan's is hygroscopic, and any water introduced lowers benefits.) http://www.evanscooling.com/catalog/C_npg1.htm
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'84 300SD sold 124.128 Last edited by compress ignite; 05-05-2009 at 12:49 AM. |
#9
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I never tried it myself, but I purchased an 11-blade fan from a fellow member here because he had no use for it. He used the metal fan with the new clutch and let my current fan sit around.
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why bother? saves $60.
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Paul Benz-less I need an SDL ! |
#11
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Sorry I havent been on in a few days...But ill start out saying that the info i have gotten from this site for my 87 300d w/om603 is invaluable from the repair to my CCU, Vacuum testing procedures and how-to's,advice and how to's on injector nozzle replacement and much more to mention...but to clear the air on this 606 clutch upgrade and save some people the $50+ dollar plastic fan when possible...I have installed the 606 clutch into the metal fan without any new bolts or modification.. I accidentally found out I ordered the 606 clutch and plastic fan from online parts distributor from advice on this site(part#s on other thread) but the clutch arrived a day early and fan wasnt till next day but i had already taken old one apart in my garage so as part of my ADHD i started the work and found that it was a drop in and i could have my car back on the road immediately so i did and works flawlessly..Im starting my 2nd summer with perfect operating temps even with a/c on and many trips made with no problems..as explained in previous thread i couldnt keep it below 100C w/aux fan jumped before so i claim victory and has about 8 to 10 thousand miles on it (odom doesnt work)Hope this helps im not trying to start anything with anyone just my experience...thanks to everyone on this site for the info that keeps my 22yr old benz going
Arlo
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W211 E550 HVAC/R Certified Technician |
#12
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How long has it been going? I have a friend who had is fan clutch replaced, but then the new clutch failed about 2 months later. The shop had simply replaced the clutch on his metal fanwheel.
If a new plastic fanwheel is only $50 just buy it and put it on the new clutch. That's way cheaper then the time required to re-do the job! -J
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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E. |
#13
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ok thanks guys, once again this forum proves invaluable.
im sticking with metal fan, i know its only $60 (plus bolts) to switch to plastic fan, but for me i need the car to get over unicoi gap on sat with 2 bikes and a full load of kids and gear. i dont have the time right now to order the plastic fan and go to dealer to buy the bolts. i will let you know, seems like its been pretty well proven. I'll keep the $60+ bucks (for now, hopefully forever). I'll update. Thanks again!!!
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Paul Benz-less I need an SDL ! |
#14
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I was able to work on the mule last night and get it all back together.
The 606 fan clutch indeed fits the 603 metal fan. The only difference I saw was the 606 fan clutch has slightly thinner profile, so the fan sits about 1/8” farther away from radiator. No big deal, it still fits in the shroud OK and clears the serp belt and accessories just fine. FYI, the 9 blade metal fan weighed 840 grams (in case anyone wants to compare to plastic fan weight). The 606 fan clutch weighed 855 grams, and the 603 clutch weighed 940 grams. I also bought a can of industrial condenser cleaner from Grainger and did what Brian previously instructed. Man that thing was dirty, you couldn’t really see thru it when held up to light. After degreasing it for 2 hrs and spraying out with garden hose for 15 min, it was a lot cleaner, but still has debris in between the coils. I also installed the new res and coolant level sensor And tried to install the new lower rad hose but World Pac sent a hose that didn’t fit (just like the upper hose they sent me a year back). Took another hr to dismantle everything to reinstall the old rubber lower rad hose. Not happy bout that… guess I will have to go to dealer and buy 1. I will drive it for next few weeks and let you know how it does. Its pretty hot today so I should be able to get on it going home from work, see if it hits 120C again… Oh 1 question – wheres the hose on top of res (at the cap) go to? Mine broke (actually crumbled) when I tried to remove it off old res. I will have to replace, but it looks like it goes toward passenger cabin somewhere? Is is bad to run engine with this disconnected? I had to cut off the end and its sorta/kinda reconnected but too short so I need another 1.
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Paul Benz-less I need an SDL ! |
#15
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Smart move - the new reservoir has a silica pack to help control corrosion. Make sure you only use MB or Zerez G-05 "yellow" antifreeze when re-filling. In a hot climate where freeze protection isn't critical, use less... maybe only 2-4 quarts of a/f (for a 20%-40% mix). I add the a/f first, plus a full bottle of Water Wetter, then fill up the rest of the way with distilled water. Don't re-start the car until you can feel liquid in the upper radiator hose. If you can't feel liquid up there... the system isn't filled properly. Quote:
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