OM603 to OM606 Fan Clutch Mod ???? - PeachParts Mercedes-Benz Forum

a2t · #1 05-04-2009, 06:43 PM

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.

compu_85 · #2 05-04-2009, 08:56 PM

No, you have to use a plastic fanwheel with the new clutch.

-J

a2t · #3 05-04-2009, 09:33 PM

Quote:

Originally Posted by compu_85

No, you have to use a plastic fanwheel with the new clutch.

-J

Are you sure? Look at post #8 and 22. Is he wrong?

http://www.peachparts.com/shopforum/showthread.php?p=1996319

Quote:

part# 606 200 01 22 it is a drop in replacement to om603 clutch at very reduced price and easy to come by..i also bought plastic fan but it is not necessary and i did not install it because it came a day later in the mail, om606 clutch is exact to the old metal fan for a om603..

Quote:

In case you missed my post (#8) you can use the 606 fan clutch with old metal fan with no additional hardware...on om603, poss? om602 not sure about other engines....part# 606 200 01 22 look it up on fastlane or supplier of your choice it is signifigantly cheaper and same or better quality..i have done this mod and am pleased i also live in las vegas and have tested it in 105+ temps with a/c up grades...The old one was original also with very high mileage..but was shot

ARLO

Thanks, ive gotten conflicting answers, i dont want to take it all apart and find i still need the plastic fan...

compu_85 · #4 05-04-2009, 09:50 PM

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

a2t · #5 05-04-2009, 09:56 PM

Quote:

Originally Posted by compu_85

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

Damn good point. The 606 fan clutch looks pretty massive, but yeah im sure the plastic fan is 3x lighter than metal.

Anyone else??

C Sean Watts · #6 05-04-2009, 10:42 PM

Quote:

Originally Posted by a2t

Damn good point. The 606 fan clutch looks pretty massive, but yeah im sure the plastic fan is 3x lighter than metal.

Anyone else??

I went to the plastic fan for the same reason. It would not take much work to get the metal fan to fit BUT it is a good bit heftier.

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?

compress ignite · #7 05-05-2009, 12:39 AM

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

C Sean Watts · #8 05-07-2009, 03:05 PM

Quote:

Originally Posted by compress ignite

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

I have seen it before but I'm a little hesitant to use it on an older engine, especially on a #14 head.

Jeremy5848 · #9 05-04-2009, 11:51 PM

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.

a2t · #10 05-05-2009, 02:01 AM

Quote:

Originally Posted by Jeremy5848

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?

why/how does metal fan require modification to use on 606 fan clutch? sounds to me like it drops right in...im probably missing something.

why bother? saves $60.

lvfast1 · #11 05-05-2009, 08:46 AM

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

C Sean Watts · #12 05-07-2009, 03:07 PM

Quote:

Originally Posted by a2t

why/how does metal fan require modification to use on 606 fan clutch? sounds to me like it drops right in...im probably missing something.

why bother? saves $60.

Some might need a little grinding on the fins to get the holes to line up.

Abadjay · #13 05-05-2009, 01:32 AM

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.

compu_85 · #14 05-05-2009, 09:16 AM

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

a2t · #15 05-05-2009, 10:13 PM

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!!!