Fuel filter Tec tip of the day.

I know alot of the older guys know but this is for the the ones that don't. Someone posted along time ago about the wix fuel filter 33540 for the finals which is a 6 micron filter and a nice step down from the 10 micron NAPA 3512 that is in our parts lookup.

So this means, you are on your computer............instead of being outside -- WORKING ON YOUR TRUCKS!!!

Leave me alone Pete it's too hot and I'm playing on the jet ski.

Are you running the 33540 in both the secondary and final or just the final and keeping the 33512 in the secondary?

When I chatted with him last, he was running the 333512 in the secondary & the 33540 in the final filter only!

Yea searls just put one in the final. As of yet I have not put one in both and checked too see if there was a pressure or performance drop and realy don't know if it will. I will bet ten cents it does not. LOL
I know I use one of jatonka's nice spin filter set and do believe they are both 6 micron (secondary and final) and found no performance loss.

FloridaAKM said:

When I chatted with him last, he was running the 333512 in the secondary & the 33540 in the final filter only!

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Ok good! I've been running the 33540 for about 3 years in the final only but was never sure if that was correct... So far has it worked fine! Maybe I'll try running one in the final and secondary at my next filter change and report back...

The 6 micron filters will work just fine. That is what I have been running, with only a 2psi pressure difference.

Floridianson said:

I know alot of the older guys know but this is for the the ones that don't. Someone posted along time ago about the wix fuel filter 33540 for the finals which is a 6 micron filter and a nice step down from the 10 micron NAPA 3512 that is in our parts lookup.

Click to expand...

Now I'm confused- are you recommending using the 6 micron Wix in both of the secondary filters? Does the 33540 come with the correct gaskets/seals?

Thanks.

I think going to the 10 in the secondary and 6 in the final would work well. Anyone else thoughts?

When I changed the filters, the gaskets that came with the filters did not work on the secondary & final filter as the gaskets were too thick. They would not fit in the groove, so I used the old ones till the next change out. No leaks as of yet!

Woodsplinter said:

Now I'm confused- are you recommending using the 6 micron Wix in both of the secondary filters? Does the 33540 come with the correct gaskets/seals?

Thanks.

Click to expand...

FloridaAKM said:

When I changed the filters, the gaskets that came with the filters did not work on the secondary & final filter as the gaskets were too thick. They would not fit in the groove, so I used the old ones till the next change out. No leaks as of yet!

Click to expand...

I've reused the old gasket multiple times before getting a leak, then just turn the leaking gasket upside down and you'll be good to go for another 4-5 filter changes!

Floridianson said:

I think going to the 10 in the secondary and 6 in the final would work well. Anyone else thoughts?

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Those were/are my thoughts, a gradual step down from the 12 micron primary to the 10 micron secondary and then to the 6micron final. An improved flow by allowing the filter to catch the size of particulate tha it was designed to catch rather than clog a smaller micron filter up quicker with the larger particulate that the larger micron filters were designed to handle. Basically, let the small filter out the small and the large filter out the larger. Just my opinion though...

I have a 5 micron primary with water drain. Got the base off of an 85' International S1800