The Stovebolt Site Forums The Shop Area Engine Shop oil filters

This is gonna sound REAL stupid, but I don't have a lot of knowledge about the stovebolt sixes, so I thought I'd ask those who know. What aftermarket manufacturers out there make spin-on (cartridge) oil filter adapters for these puppies. I looked around on some of the parts links and couldn't find anything(did find a TH350, 400, 2004R, 700R4, etc to inline adapter though...) All this discussion on here about straight sixes has me thinking that when I FINALLY get my dream truck, it might be best (or at least cool) to keep the six. Thanks for any help you all can offer.

It all depends on what motor you get. If its a bypass filter you just take it off and toss it cause it dont do anything anyway.But when you go to rebuild it you can change it over to a full pressure filter system.I wrote a halfa##ed article in the tech section on how to do a 235.Some others you have to move a plug around.Let us know what motor you get.

Phat, I've got a 55 2nd with a 235. What do you mean by a by-pass oil filter? How do I tell if I have one or not? My oil filter is remotly mounted off of the block and has a pressure and return line to/from it. Is this a by-pass system?

Unless it's been modifid, your 235 has a bypass filter. That means that only part of the oil goes through the filter. Phat has a dislike for these and removes them, I say that it is better than no filter at all. Here's how to convert a 235 to a full flow filter tech tip

Since all the oil in is one place, wouldn't eventually ALL the oil go through the filter? I don't understand what people mean when they say only part of the oil goes through the filter. If it falls back in the engine then it will remix and ALL the oil will eventually go through?

Tony, you're right. Eventually all of the oil will go through. I don't know exactly, but I would estimate about 10% of the oil that is pumped goes through the filter. On a "full flow" system, the filter is in line after the pump, all of the pumped oil goes through before it goes to the engine. With the bypass system, some of the dirt goes through the bearings and valve train. That's why non-detergent oils were used, the dirt settled to the bottom of the pan rather than being suspended in the oil with detergent oils. The big item it to keep your oil changed before it gets dirty.

OK. If I have the 55 2nd original 235 - whatever pressure engine. And am pretty sure I have the pass through filter system (its got the bee hive canister with the 2 hoses), but am somewhat skitish to change to the Phat oil filtration system, is it better to get over this and drill the holes in the block - or change the oil more often? Is there a mileage (<3,000 mi) to use as a magic number?