Word of caution on the Mallory pumps

[John]

Originally posted by Steve St. Laurent

I've been biting my tongue, didn't want to pour salt into an open wound

Ya right Steve!



Come on, give us Mallory guys a break! First we spent at least twice as much as you pusher pump guys did and now it's biting us in the butt to boot! And this as they say, really does bite!



Oh well, if my Mallory 4140M goes TU, I'll install my new backup unit, ***** a little (ok, a lot), and get on the phone and order an Aeromotive A1000 and the appropriate regulator and anything else I think I might need to do what I had planned on to begin with.





... you guys remember when I said, "I have a plan"?





... well, I never said it was a good one!

 

[Morphious]

Well, since the mallory subject came up, thought I would chime in as well. As some of you know, I am on my second pump as well. I got around 60k on the first pump in around 6 months. The second pump has around 40k on it now, with about 4 months of driving. I did not run the regulator or a prefilter, and am still using the power from the stock pump, just spiced the wires. I still haven't gotten off my but and sent in my first pump to have it checked out. Course I have also not screwed around with the set screw in the pump either.



Morph.



100,000 miles traveled in 2001

 

[John]

Originally posted by Morphious

100,000 miles traveled in 2001

Morph, have you even had the time to stop the engine while changing out the fuel pumps?

 

[Bigsaint]

Thanks for jumping in, Morph. I was thinking of ya when I posted this thread. I'm surprised that you didn't have to adjust the Mallory after the install, I'm on my 3rd install now and all three read around 10 psi's at idle, PRE-FILTER, which isn't enough for my demands at WOT.



Scott W.

 

[Morphious]

Yeah, 100,000 miles last year. With my kids on the east coast, the every other weekend trips add up quickly, along with commuting 120 miles a day. Sometimes I feel like my arse is permanently attached to the seat... .



BigSaint - I didn't need to adjust the pump, I guess I am getting old or something. I never get mine below 9psi when accelerating and it idles and cruises at 11-12 psi.



Morph.

 

[csutton7]

I thought I was posting my Aeromotive info on this thread this morning, but after I got it all typed up I saw I had hit the NEW Topic button instead and I had to split for work pronto--so that's why there's the Aeromotive info thread---it will be interesting to hear what they find out about your Mallory pump Big Saint----chris

 

[Bigsaint]

Got the results

Or the lack thereof. I spoke with the guys at Century Performance today, who in turn had the last Mallory repaired for me by Mallory. The response from Mallory was that my pump died from cavitation due to debris. Hmmmm, seems that I had the same response I received last time. I bought it last time, as I had a water/fuel seperator (with a screen), but figured it wasn't up to snuff in regards to the microns it filtered. I added a Earl's screen filter the second go 'round, rated to filter down to 40 microns ( that is what Mallory calls for). After 5000 miles I removed the Earl's filter and did find some debris. At 7500 miles, with the Earl's on, I changed the OEM filter and found it to be very clean. In addition, during the 2 months prior to the death of the 2nd Mallory, all the fuel that went into my tank came from my transfer tank in the bed. I used a Fill- rite pump and a Goldenrod water/fuel filter that is rated down to 15 microns, so all my fuel added during the last two months of my last Mallory was filtered quite well.



I asked if air could have caused the cavitation and they stated yes, but were doubtful that enough air could have been sucked through a improperly sealed deadhead screw to cause the cavitation. I also asked if it was possible that my brushes were worn and needed replacement, again, the answer was no. Mallorys diagnostic examine specifically indicates that the lower housing needed replacement due to scoring on the walls from cavitation.



I seriously doubt the fuel I'm using is NG or that I received a bad batch. All of my diesel comes from one place, a local trucking Co. that fuels a large fleet and trucks and buses, all the towns DPW diesels and many private owners. I checked and they have received zero complaints on a bad batch of diesel. If/when the Mallory I'm using dies or starts to show signs of impending death, I'm going to replace the brushes myself and see if that's the cure.



I should add that my displeasure has nothing to do with Century Performance, they are a great bunch of folks to do business with.



Scott W.

 

[BIG BOB]

I had 22,000 on my Mallory when it failed. The second one is working fine, 13 lbs factory set at an idle.



Summit warrantied the first pump without a question. So I have a brand new spare. Second pump came from Century.



Do they make a rebuild kit for the Mallorys?

 

[danandamy]

Poor overvalved guys, I'll just never understand. Oh well, only have 125k on my old mechanical lift pump.....



12vdan

 

[Bigsaint]

Bob, Century does carry a brush kit and a seal repair kit. The cost for Mallory to repair is $50. 00.



Dan... back at ya



Scott W.

 

[Mad Max]

Still kill'n Mallory pumps huh???



http://www.essexind.com/sx_page3.htm



I thought someone was experimenting w/ one of these??? Don't get much sicker than this... w/o getting into something that doesn't have sustained usage in mind, like some of the ALC' pumps for drag car...



MaX

 

[Bigsaint]

Thanks Paint ball guy .



Scott W.