Engine/Transmission (1998.5 - 2002) Mallory Lift Pump Update

[BIG BOB]

I sent the Mallory 140 lift pump back to Sam at Century Performance. He called and told me Mallory said that the pump was run dry and burnt up. That is totally incorrect and I told him so. That pump was never run dry. They were going to charge me $60. 00 for the repair of the pump. I asked him for the Mallory phone number and the tech I should talk to at Mallory. He gave me both. I then emailed him a picture of the mounting of the pump, filter in relation to the tank.



I talked with Dennis at Mallory, I had talked with him and went over the installation of the pump and filter before I ever purchased the pump. He remembered me. Dennis got together with the Mallory Engineers trying to figure out why their pumps are failing. I talked with one of the Engineers and they think that the diesel fuel is more corrosive than the had first though. They are going to install the iodized internal components of their Comp 140 Marine pump. These components are much more durable. I am going to be the guinea pig, and keep them informed on how the Marine pump holds up.



I know there is alot of you out there that are or have used the Marine pump. I am going to start another thread about the durability of the Marine pump. If you would please let us know how the Marine pump is holding up.



Thanks, Big Bob.

 

[Bigsaint]

That's great info Bob, I hope it works out for you !!! I was under the immpression that the marine pumps only had a different coating on their exterior, guess that's not the case.



Every analysis I got back from Mallory said the same... cavitation from debris caused undue stress and the armature then burned up. Can't see how I had any debris with the 2nd or 3rd Mallory, as I was running the Earl's screen filter pre pump. I know they were not sucking air from the inbound fuel line and, after speaking with Century on my concern with the dead head adjustment and my lack of sealing same after adjusting the pressure on the second pump, I doubt that was the cause as well. Maybe the internal parts are having a hard time with the diesel. That might explain why the brushes are wearing so quickly.



I don't recall if anyone running a marine grade Mallory has had a failure yet, hope that's the answer. Other than it's short life expectancy, it's a great pump in my book.



I was talking to Chris T. from Auto Wurks the other day about the Mallory. Chris upgraded his fuel system on his 12 vavlve rig last year, so far, with over one year and 25,000 miles, the pump is still doing fine. I believe that it is a regular 140 series Mallory, not marine grade. Chris is running his with a Earl's screen filter, pre pump. The only thing different between his set up and my last pump is that he has his pump set at max. psi's ( somewhere around 40 psi's I believe). While us 24 valvers can't use that much pressure, I have to wonder if the pump is happier if set higher rather than lower. Common sense would dictate the opposite, I'm just not sure.



Hope it works out for you .



Scott W.

 

[Jetpilot]

Bob,



I installed the Mallory 140 amrine model about 5 months ago... It is still working fine to this date. I am in hopes that the Mallory Tech/Engineers are correct and the marine model pump will work with diesel. I also installed mine with the Mallory pre-filter they recommend.



Doug

 

[FFutch]

Hey,Doug. Did you get your head gasket fixed yet?Looking forward to seeing that thing run ... . Doug

 

[JWhitcomb]

So just for the heck of it tomorrow I will cut some nice clean surfaces on a piece of alum, put it in a sealed jar with fuel, and see what happens after a month or so.

 

[Jetpilot]

Doug,



Nope truck is still in pieces... . I sent my head to Piers to be O-ringed, hopefully this will stop it from blowing again. It should be on its way back to me now (it takes about a week each way shipping). Hopefully I will have it back together next week.



Doug

 

[BIG BOB]

Jetpilot,



How many miles are on your Mallory Marine pump? What are the pressures you are running?



I know that John put the Marine pump on his Blackout.



The internal parts of the Marine pump are Anodized which does make them harder, and less prone to corrosion.



Thanks for your input.

 

[JWhitcomb]

Big Bob, I think you mean anodized instead of iodized.

 

[jimnance]

Lift Pump

Go figure, 65K on my truck and I figure I'd better check fuel pressure. Idle pressure AFTER the filter was 14 PSI which I am told is well within spec.



I wonder if these failures could be related to where you purchase your diesel? For example, in California I understand they have extra low sulfur diesel. Are they having more problems there?



The parts manager at the local Dodge dealer is a buddy of mine. He said so far they have had only five or six lift pump failures. Since they sell about 10 diesels per month (they sell a lot of diesels here) that is a pretty low failure rate. Only about 1. 5%.

From what I see in the forums that seems pretty low.

 

[BIG BOB]

JWhitcomb,



OOPPP's! Your right! Thanks for the correction.

 

[Bigsaint]

Bob's an old timer 'round these parts, he slipped and said Iodized as he's just a bit salty



Scott W.

 

[JWhitcomb]

Scott, there is a quality control test for anodized and alodine coated parts that involves many hours in a salt spray. For all I know he might have been refering to that, but I thought he ment anodized. Not being critical, just a buttinsky... Jim

 

[Jetpilot]

Bob,



I only have around 5-6K miles on the pump... . As for pressure I am set at 16 psi idle (checked at the VP44) and the least I see is about 8. 5 psi at WOT.



I don't have near the miles on my pump that some of the others have on theirs. In fact Bigsaint (Scott W. ) probably has the most experience of us all when it comes to the Mallory pumps. Scott just changed out to a new brand pump that I am in hopes works well! I am also in hopes that I my pump lasts a long time but if it doesn't I will probably try the pump Scott is using now if it works well.



Doug

 

[Bigsaint]

Jim, I was just busting Bob. Not meant to flame you in any shape or form .



Well, if nothing else I probably have the most experience swapping out Mallory pumps . John ( with the mean looking black truck) has alot of knowledge with the marine pump, maybe he will chime in as well.



So far, the PE pump is holding it's own. It's only been a few weeks though. Sure does look purty anyhow .



Scott W.

 

[AKostman]

pumps

I wonder if the new Dodge coming out with the Federal Mogual pump will be better? Maybe we could up grade to this pump? Anyone have ideas? Thanks

 

[BIG BOB]

I just got the Mallory Marine pump back from Century Performance today. Hope to have it installed tomorrow along with a 60 gallon fuel/tool box in the bed behind the cab.



This Marine pump just might be the fix. I haven't heard of any Marine pump failures. Time will tell.

 

[KatDiesel]

Originally posted by BIG BOB

This Marine pump just might be the fix. I haven't heard of any Marine pump failures. Time will tell.

Marine Version failure?



I can only guess that the "m" next to the model number indicates it was a marine version of the pump?

 

[SEmerson]

I am on my 3rd set of brushes. And my armature is just about shot. This is the last set of brushes it will take. I have been very disapointed in the reliablity of my mallery. I am going back to the stock lift pump I think. :{

 

[csutton7]

I remember an old post where HVAC had talked to the boys at Mallory and the only difference between the Marine version vs the other was the outside anodized housing--nothing interior---now that doesn't mean they haven't upgraded--but I'd be extra sure before I went and spent some money on the Marine version, thinking I was getting something that I'm not---chris

 

[Un-Hemi]

AKostman, Federal-Mogul owns... ... ... . Carter!



I've got the box for a Carter/Federal-mogul P4594 FP right beside me. Don't panic. It's just a little 7psi pump I use for fuel transfer. Looks just like the cursed lift pump though. One difference, though; the mounting bracket comes with rubber isolators for the pump. I don't know if the 4601HP does or not. Anybody?



Now what??



Seriously, I hope they do better on the new trucks.