Thread: Engine Failure on 3.0lt SDV6 help.

Originally Posted by stuarth44

where you cut the swarf will be on the outside you are only looking at the inner side, the oil floes inner to outer

It does? I'm asking because I don't really know rather than being confrontational. I can't find it in any of the manual sections.

Every spin-on filter I've cut apart has had an anti-drain back valve on the outside set up such that the oil flows outside to inside. I cut them apart with a lathe so the swarf is completely distinct from any embedded contaminants in the paper. I can't see the TDV6 cartridge being different. If the oil flowed inside to outside I'd have thought the media would balloon and fail.

I've heard reverse flow filters exist (inside to outside) but I've never seen one in the flesh.

Originally Posted by BradC

It does? I'm asking because I don't really know rather than being confrontational. I can't find it in any of the manual sections.

Every spin-on filter I've cut apart has had an anti-drain back valve on the outside set up such that the oil flows outside to inside. I cut them apart with a lathe so the swarf is completely distinct from any embedded contaminants in the paper. I can't see the TDV6 cartridge being different. If the oil flowed inside to outside I'd have thought the media would balloon and fail.

I've heard reverse flow filters exist (inside to outside) but I've never seen one in the flesh.

wrong abt flow path, maybe, all i know is the metal shows, it is 49 years since my Cummins days, memory not perfect

Most flow outside to inside.
The caterpillar tool for cutting a filter doesn't create swarf, it's basically a really large pipe cutter. Like what a plumber uses to cut copper pipes.
If you were going to cut one of these diesel engines filters to inspect for Metal don't forget to"press" the oil out. Take the cut section and put it in a vice tighten up then inspect with a torch.
Modern oil analysis far outweighs filter cuts in my opinion. However I believe caterpillar in Guildford have a filter cut service and the results are inspected under a microscope. They can then determine the metal and type of failure that led to it being caught in the filter.

Originally Posted by josh.huber

Most flow outside to inside.
The caterpillar tool for cutting a filter doesn't create swarf, it's basically a really large pipe cutter. Like what a plumber uses to cut copper pipes.
If you were going to cut one of these diesel engines filters to inspect for Metal don't forget to"press" the oil out. Take the cut section and put it in a vice tighten up then inspect with a torch.
Modern oil analysis far outweighs filter cuts in my opinion. However I believe caterpillar in Guildford have a filter cut service and the results are inspected under a microscope. They can then determine the metal and type of failure that led to it being caught in the filter.

the idea is for the home mech to catch it before it becomes a major,

Yeah I agree Stuart, but if concerned oil testing is far more accurate then a filter cut. Very easy to get access to these days aswell

Originally Posted by josh.huber

Yeah I agree Stuart, but if concerned oil testing is far more accurate then a filter cut. Very easy to get access to these days aswell

And a hell of a lot less messy than cutting a filter on a lathe!

If I’m relying on seeing metal in my filter as my guidance to my engine is about to grenade, we’re in trouble.

Originally Posted by DiscoJeffster

If I’m relying on seeing metal in my filter as my guidance to my engine is about to grenade, we’re in trouble.

bearings often take time before they start to knock
but this test if often used when you go out to an engine failure, tells you whether it is piston or bottom end
I was often called out, once i had to go to a truck body shop, the truck had rolled, the driver was dead, the engine was running , truck on its side, i had to pull the pan to check it out,
anyways, i 'm over the nitpicking here.