Cat 2 Micron Fuel Filter NOW Online

dgeist · **Posted:** Fri May 11, 2007 9:39 am

CATCRD wrote:

I'm going to have to take mine apart again and seal it with something. Every couple days it'll accumulate enough air to stall it when I first put it in gear. Bleed it out and it's fine.

As far as I can tell, if folks are getting enough in there to be a problem, then there's a lot of air. The injection pump self bleeds on startup:

The cascade overflow valve has two functions:
- Regulation of lubrication fuel to the internal moving parts of the high pressure pump
- Regulation of the fuel pressure being supplied to the fuel quantity solenoid
The cascade valve has a machined center piece that has three drillings. One for overflow, one for lubrication and one for supply. The valve works in three stages based on the pressure entering the inlet of the valve.
Stage 1 When the fuel pressure entering the tip of the cascade valve is between 0 and 3 bar (44 psi), the spring force is not overcome and fuel only flows
through the center drilling. This drilling always allows fuel flow through to the pump center ring and lubricates the pump bushings and internal moving
parts. This circuit also allows air to bleed during initial cranking and returns the air to the fuel tank.
The cascade valve is only in stage one during cranking.

Dan

Goglio704 · **Posted:** Fri May 11, 2007 9:47 am

It is a lot of air. Not only is the pump able to some bleed air, but the OEM filter has a dip tube down the center which doesn't allow air to leave the filter until the upper 2/3 of the filter are full of air. Nonetheless, I can tell you from personal experience, you can get enough air to overwhelm the design.

skywarn · **Posted:** Sun May 13, 2007 6:21 pm

well i put my filter on...

i had planned all day to make sure i had 2 hours of time to do this mod... so come 5pm. i picked up my garage, put my "dirty" clothes on... got on line printed the 9 pages of the instructions, grabed the ups box and headed out...

well.... lets just say i didnt need my "dirty" clothes, nor the 9 pages of "how to" or 2 hours of time... i really do think it took me longer to get ready to do this than it did to do it! so about 30 min later... i was on my couch, witth a cold one! (coke that is

)

i have to say its $60 very well spent

stevesmith7 · **Posted:** Mon May 14, 2007 7:47 am

CATCRD wrote:

I'm going to have to take mine apart again and seal it with something. Every couple days it'll accumulate enough air to stall it when I first put it in gear. Bleed it out and it's fine.

I think I've reached the same point. Only a hint of wetness anywhere but every time I bleed it I get a bunch of air out. How can fuel under pressure not leak out but air get in? BTW,, any ideas for what to use as a sealant? I'm ready to move in that dirrection.

Thanks
Steve

LanduytG · **Joined:** Sun Dec 11, 2005 6:59 am **Posts:** 188

stevesmith7 wrote:

CATCRD wrote:

I'm going to have to take mine apart again and seal it with something. Every couple days it'll accumulate enough air to stall it when I first put it in gear. Bleed it out and it's fine.

I think I've reached the same point. Only a hint of wetness anywhere but every time I bleed it I get a bunch of air out. How can fuel under pressure not leak out but air get in? BTW,, any ideas for what to use as a sealant? I'm ready to move in that dirrection.

Thanks
Steve

Its not under pressure, its a vacuum system. When bleeding the air after you get fuel close the bleeder and then pump up the filter till it gets hard to pump. As for sealant on the adapter use Blue Loctite or teflon pipe paste No sealer needed on the o-rings.

Greg

stevesmith7 · **Posted:** Mon May 14, 2007 8:53 am

LanduytG wrote:

Its not under pressure, its a vacuum system. When bleeding the air after you get fuel close the bleeder and then pump up the filter till it gets hard to pump. As for sealant on the adapter use Blue Loctite or teflon pipe paste No sealer needed on the o-rings.

Greg

Ok, I didn't understand it was a vacuum system. If a bunch of us are having air leaks then it's most likely the o-rings not sealing and that's where we're looking for a sealant to help seal. Where else can the air be getting in?

Is it possible that after opening the sytem it takes a few bleed cycles to get everything purged of the air you introduce?

Steve

LanduytG · **Joined:** Sun Dec 11, 2005 6:59 am **Posts:** 188

stevesmith7 wrote:

LanduytG wrote:

Its not under pressure, its a vacuum system. When bleeding the air after you get fuel close the bleeder and then pump up the filter till it gets hard to pump. As for sealant on the adapter use Blue Loctite or teflon pipe paste No sealer needed on the o-rings.

Greg

Ok, I didn't understand it was a vacuum system. If a bunch of us are having air leaks then it's most likely the o-rings not sealing and that's where we're looking for a sealant to help seal. Where else can the air be getting in?

Is it possible that after opening the sytem it takes a few bleed cycles to get everything purged of the air you introduce?

Steve

You might want to replace the o-ring on the center section. Also if you took the banjo fittings loose that can be a source. The 2 we have here work great. Did you grease the o-ring before putting it back together?

Greg

techTim · **Posted:** Mon May 14, 2007 6:28 pm

there was mention of replacing the gasket between the two parts with the old filter gasket, as it was close to twice as thick. it's somewhere in the fuel heater thread I think. maybe the oem part has compressed / aged enough to be worthless?

LanduytG · **Joined:** Sun Dec 11, 2005 6:59 am **Posts:** 188

techTim wrote:

there was mention of replacing the gasket between the two parts with the old filter gasket, as it was close to twice as thick. it's somewhere in the fuel heater thread I think. maybe the oem part has compressed / aged enough to be worthless?

It very well could be.

greg

truckbouy2 · **Posted:** Tue May 15, 2007 7:40 am

Greg...
Went on your site to order the Cat setup and noticed a discount code spot.
As LOST'ers do we have a discount code ???
:wink:

LanduytG · **Joined:** Sun Dec 11, 2005 6:59 am **Posts:** 188

truckbouy2 wrote:

Greg...
Went on your site to order the Cat setup and noticed a discount code spot.
As LOST'ers do we have a discount code ???
:wink:

Sorry no code.

Greg

skywarn · **Posted:** Tue May 15, 2007 9:29 am

The discount would be that we are now free from having to pay Mopar for their overpriced, poor stock 5 micron filter!

truckbouy2 · **Posted:** Tue May 15, 2007 9:35 am

Thanks Greg...

LONEPINERON · **Posted:** Wed May 16, 2007 6:43 pm

Looks like a great mod I just ordered 2 napa filters so will have to wait till they are used up $18.20 at fleetfilters.com also they have ones to replace the Cat2 filters the 1r0750 converts to 33528 and $8.04 the larger 1R749 is P# 33674 and is $11.67. Hopethis helps. LPR

LanduytG · **Joined:** Sun Dec 11, 2005 6:59 am **Posts:** 188

LONEPINERON wrote:

Looks like a great mod I just ordered 2 napa filters so will have to wait till they are used up $18.20 at fleetfilters.com also they have ones to replace the Cat2 filters the 1r0750 converts to 33528 and $8.04 the larger 1R749 is P# 33674 and is $11.67. Hopethis helps. LPR

I would want to see the manufacture spec on the replacement. I really doubt they are 2 micron. they might fir and look the same but I'm will to bet their not the same inside.

Greg

LONEPINERON · **Posted:** Wed May 16, 2007 6:51 pm

They are Napa Gold filters. here is a link to specs http://www.wixfilters.com/filterlookup/ ... Part=33674

LanduytG · **Joined:** Sun Dec 11, 2005 6:59 am **Posts:** 188

LONEPINERON wrote:

They are Napa Gold filters. here is a link to specs http://www.wixfilters.com/filterlookup/ ... Part=33674

Just as I thought their is a big difference. They are 2 micron nomimal not absolute as the Cat is. So that makes the Wix about 10 absolute.

Greg

crdmike · **Joined:** Tue May 16, 2006 7:25 pm **Posts:** 138

LanduytG wrote:

LONEPINERON wrote:

They are Napa Gold filters. here is a link to specs http://www.wixfilters.com/filterlookup/ ... Part=33674

Just as I thought their is a big difference. They are 2 micron nomimal not absolute as the Cat is. So that makes the Wix about 10 absolute.

Greg

Thanks Greg, quick delivery and simple install!

Ripster · **Posted:** Sun May 20, 2007 2:32 pm

Greg 2000 mile trip no issues, let me know when you have the cat filters for sale on your website.
I have a spare 751 which is of course a bit longer.

tigafila · **Posted:** Sun May 20, 2007 10:07 pm

Would it be possible to eliminate the fuel heater? My buddy says that's what you have to do to the similar setup on the 12 valve cummins. Tigafila

Cat 2 Micron Fuel Filter NOW Online

Who is online