fluidamper vs. ati harmonic balencer

[mwilson]

mwilson, and everyone, thanks for pushing through with this...



I am very curious as to how this pans out... perhaps the fan pulley is a smaller diameter and the damper is larger, so it all still fits ??

That is what I figure and if the engineers were on the ball when they decreased the diameter of the fan pulley to compensate for the larger diameter of the fluid style damper they would have it use the same fan belt as the 5. 9L.



Mike.

 

[seafish]

That is what I figure and if the engineers were on the ball when they decreased the diameter of the fan pulley to compensate for the larger diameter of the fluid style damper they would have it use the same fan belt as the 5. 9L.



Mike.

Have you chcked to see if the fan belt IS the same...

of course if it is different , it might be for othre reasons, but still it would be nice to find out !!

 

[mwilson]

Have you chcked to see if the fan belt IS the same...

of course if it is different , it might be for othre reasons, but still it would be nice to find out !!

Fan belt is the same, checked Gates applications and all third Gens take the same belt. 2003 thru 2011 all use the K081264 belt for applications with a/c.

 

[mwilson]

OK got some Cummins part numbers here guys with prices from Cummins Northwest:



Crank damper 4933224 $222. 82 (4 in stock at factory at the moment)

Mounting bolts 4937228 $1. 23ea (need 4 but should be able to reuse originals)

Adapter 4937760 $18. 12 (not sure what this is or if it's needed)

Dowel pin 3946495 $1. 53 (evidently Cummins uses a dowel for better vibration transmission to the damper, just guessing)

Part number for fan pulley once again is 4930580, just got pricing this morning. 62 in stock at the factory.



Should sell for $44. 00 or so.



Mike.

 

[seafish]

Mike, THANKS !!! All good news-- I will be installing My SBC ConOFE pretty soon and wanted to replace the stock 5. 9 damper with either a fluidampr or the new 6. 7 damper.

From everything I am reading, and with the info you guys are providing, it looks doable. Now I still to determine if the 6. 7 damper needs to get turned down . 080" like they say on Competion Diesel, or if with the updated fan pulley everything fits just fine. One would think that if it uses the same belt, everything would fit, but there still might be clearance issues with the larger diameter damper.

FYI--one of the reasons that I am leaning towards this mod is that the "Fuel Boss" kit that GDP sells to replace the 3rd gen lift pumps, will NOT fit on a 5. 9 with the fluidamper... I will call them soon to see if it will fit on the 6. 7L set-up. It is a VERY nice kit and i hope to eventually use it if/when my in tank pump dies--

Glacier Diesel Power - Product Detail

 

[Vaughn MacKenzie]

The fan pulley setup looks a little different than on my 2001, the hub mount looks different. I think I'm going to order the 6. 7 damper on Monday and just give it a try. Looking at my truck there is almost an inch of clearance with the current damper so it's probably the same as the 3rd Gen 5. 9s. But I see if I needed to add a tenth of an inch of clearance I could grind down the flange on the fan pulley since it has a shoulder on my truck.



Question: are there any "discount" Cummins parts retailers. . . I wonder if $222 is the going rate or if the damper could be found for less elsewhere?



Vaughn

 

[HEMI®Dart]

OK got some Cummins part numbers here guys with prices from Cummins Northwest:



Mounting bolts 4937228 $1. 23ea (need 4 but should be able to reuse originals)

Somebody said here the damper mounting bolts are torque-to-yield. In other words it's best to use new ones.

 

[HEMI®Dart]

Question: are there any "discount" Cummins parts retailers. . . I wonder if $222 is the going rate or if the damper could be found for less elsewhere?



Vaughn

Sheesh Vaughn, With Vibratech Fluidampr's around $485..... If I could get one for $222 or ½ price of the FD I would be damn pleased. :-laf

 

[Vaughn MacKenzie]

Hey HemiDart I found it at a local truck service center for $221. . . one phone call saved me a buck! :-laf

 

[Prairie Dog]

Who's going to be the first to try this first??
Volunteers?

 

[CSilkowski]

I've been reading these posts for sometime now and was curious if something like this would improve the symptoms that I've been experiencing lately. When demanding more power at lower rpms (1500 to 2000) my motor vibrates and growns and feels like it's going to explode. I don't remember it behaving this way when it had fewer miles. I currently have 115k on the odometer.



Thanks

 

[seafish]

I've been reading these posts for sometime now and was curious if something like this would improve the symptoms that I've been experiencing lately. When demanding more power at lower rpms (1500 to 2000) my motor vibrates and growns and feels like it's going to explode. I don't remember it behaving this way when it had fewer miles. I currently have 115k on the odometer.



Thanks

IF the cause of your vibrations is the failure of your old damper, then replacing it with an ATI or Fluidampr would DEFINITELY help your vibrations.



The recent article on Harmonic Dampers in the newest issue of TDR shows how to inspect your old damper for wear and damage and how to replca with a new one, either ATI or Fluidampr.



However, it's possible your engine vibrations are being caused by something more serious, so if the OEM damper checks out then you will need to look deeper.

 

[CSilkowski]

The recent article on Harmonic Dampers in the newest issue of TDR shows how to inspect your old damper for wear and damage and how to replca with a new one, either ATI or Fluidampr.

Yes. I saw that article and that was what got me thinking. I performed a visual check today and the rubber insert appears intake with no apparent degradation. Even so, I ordered a Fluidampr today and will start isolating the problem.



Thanks,

Chris

 

[HEMI®Dart]

I have had a Fluidampr on the truck for 5 years now. Right off the bat I noticed a new "smoothness" through out. From idle to redline. The engine seems to rev easier too. It other words I am at 2200 rpms and I don't notice it. With the OEM balancer I'd know it at 2000 rpms.



One of the best BOMBS I have ever added the the truck!

 

[HEMI®Dart]

MY OEM damper was fine. No rubber degradation, Witness marks lined up.

Changing to the Fluidampr made a marked improvement!

 

[Buddy's Ram]

I installed the Fluidamper today. I had been experiencing surging at 2200 RPM.
The OEM damper looked ok other than some fuzzy strips on the plastic. The truck idles smoother/quieter and the surging at 2200 is gone. I am pleased with the purchase. Thanks for the write up in the magazine that alerted me to check this.

Buddy

 

[RSchwarzli]

.



One of the best BOMBS I have ever added the the truck!

You know you have been on this forum a long time when you see BOMB... . :-laf

 

[1972JohnBoy]

Fluidamper worth the cost?

I was a surface mechanic at an underground coal mine in the late 80s. Our refuse haul trucks were R-20 Euclids with inline 71 series Detroit Diesels which are 2 stroke engines. Governers set at about 2250 rpm no load speed. These trucks had air brakes and a front mounted belt driven air compressor. Had a truck that started throwing the belts. Tried Dayco instead of Gates belts, changed the compressor and pulley and still didn't cure the problem. At about 1800 or so RPM the truck would vibrate tools off the fender. Had people from reputable machinery companies come in and try to figure it out with no useful results. I was looking at the front of the motor one day in disgust, out of ideas and noticed that the crank damper was wet with fluid on the back side. Got the service manual out and looked to see if there was any info on it. It was a FLUID filled damper, about 2'' wide and 14'' diameter. It was obviously leaking whatever was in it. Ordered a new one, put it on, problem solved. The rest of the story is that 2 days later that trucks crankshaft broke between 3&4. That is the reason I am running a Fluidamper on mine. And I think it would be smart to take a look at it every service time.

 

[Prairie Dog]

Dang it, I'm going to have to get one. Any chance we could put together another group purchase to get a great deal?

 

[Bob4x4]

Somebody said here the damper mounting bolts are torque-to-yield. In other words it's best to use new ones.

That would be incorrect... ... ... . they are indeed reusable.