There used to be a lot of discussion about adding a pre-filter to save the injectors. I haven't read anything about this topic for the LBZ. Is it a non-issue with the new motor, or does everyone take it for granted that it should be done?

I believe the newer filters that are double pleated addressed the issue. Whether or not you need another is more of a personal decision. I run the one from Greg at lubrication specialists as a pre-filter. 17,000 miles no problems and it's an easy install and service. With fuel my opinion is better safe then sorry. Probably the most common secondary filter would be the Nicktane filter. Like I said it's really how you feel about it.

I put on a secondary Pre-OEM filter as well. It was something to do and looks cool. Like I tell everyone who ask me "Why". It can only help the engine.

Not for me , my hope is GM knows best.

I will add one yet just for the added protection, but if you’re not going to keep your truck a long time don't get one.

Pre filters in a D/A are like using a condom when bar hopping or in a cat house. Pre 1970 or so you didn't normally need them (TJ was the exception), but today you are a hell of a lot safer with one than without. And nobody wants to pay the "without price". Same with D/A fuel filters. I have run all three majors (Mega, Racor, and now Nicktane) and prefer the Nicktane for ease of quick change, cost, etc. I run a lot of Mexican and Guatemalan fuel in my trucks and have never had a problem using a pre filter. I change my fuel filters every 6,000 miles in Mexico and every 9,000 miles in the US. Cut several open, and usually find most everything in the pre filter. They work.

Pre filters in a D/A are like using a condom when bar hopping or in a cat house. Pre 1970 or so you didn't normally need them (TJ was the exception), but today you are a hell of a lot safer with one than without. And nobody wants to pay the "without price". Same with D/A fuel filters. I have run all three majors (Mega, Racor, and now Nicktane) and prefer the Nicktane for ease of quick change, cost, etc. I run a lot of Mexican and Guatemalan fuel in my trucks and have never had a problem using a pre filter. I change my fuel filters every 6,000 miles in Mexico and every 9,000 miles in the US. Cut several open, and usually find most everything in the pre filter. They work.

I'm thinking of a pre filter for the same reasons given here. My question is doesn't a lift pump make sense with the additional restriction of the pre-filter. Second question: presuming the pre-filter has a lower micron rating than the secondary (oem) filter, shouldn't we place the lower micron rated "so called pre-filter" post the oem filter?

I plan on getting a NickTane one of these days. I gotta look into a secondary oil filter aswell. Hmmm there's also the interior to work on and.... :rolleyes:

:D

My 2 cents is I wouldn't. Keep in mind your water trap is on the filter, unless you put another water trap ahead of or on the other one you want to install, it could be a point for geling in the winter.

I don't ever remember hearing of gelling fuel in the Nicktane.

I dunno, but just seems that that would be a place for the moisture to hang up and cause problems. I guess thinking about the older diesel tractors and it always seemed if they gelled up it mucked the filters up. Guess i am asking more than anything here.

I have the secondary filter from Greg at lube specialists. 17,000 miles no problems. It's located on top of the motor where the second alternator would go. I use it as a pre-filter to the factory. I always run additives in the fuel and have never had any fuel gelling problems, but on Long Island N.Y. I don't see the extreme cold either. The filter takes about 1 minute to change in this location if I did run into a problem, and for me that one minute of inconvience is easily out weighed by the added benefits of cleaner fuel. At 26-30,000psi for injector pressure it won't take much dirt to send them south, it's just another added measure of safety like my tranny brace. Will I ever need it? I don't know but I'm glad it's there.