JLT catch can

[Grey]

I spoke with my Chevy dealer and they said we don’t need an oil catch can for the 2.7 Turbo because GM designed the engine to manage it internally. They used more technical terms but ultimately they said if someone makes an aftermarket catch can for this engine, I could still use it, but they don’t recommend it because if anything goes wrong with the engine, GM will 100% try to push back and try to blame the issue on any aftermarket part I installed on the engine unless it’s an OEM part.

It was already stated earlier in a reply, but you are correct in that technically all newer engines are built to manage crankcase ventilation byproducts internally, but that isn't necessarily the best thing. those oil vapors that would otherwise be caught in a catch can make their way back into the intake tract and can build up on the valves. In a DI engine, they also don't have the luxury of an injector pressure washing the back of that valve constantly. The thought process is that over time, that build up could cause issues. 99% of consumers would trade high mileage reliability and peak performance for one less maintaintance item though. And im pretty sure that the EPA would prefer those vapors be burned off inside the engine rather than be dumped.

Admittedly, the science of how FI changes crankcase pressure is bit over my head, so it could be different with the turbo.

As far as changing things in the engine, a catch can is just simply not going to cause issues outside of a VERY botched install. I really do understand the thought process behind keeping a warranty intact with the truck and being reserved with mods, but on the scale of bumper sticker to aftermarket supercharger, the catch can is slightly more invasive than the bumper sticker. I get why a dealership would say that, as any reason to dissuade changes to the vehicle is a good one for them, but objectively, a trained monkey could install one of these premade catch can kits and not harm the truck in any way.

 

[Izzyduck]

From a 2022 6.2 just under 10,000. I installed the catch can around 1000 miles and checked it at 8000 and it was full. I'll be checking it more frequently from now on.

 

[GETGONE]

It collects a lot of crap quickly. Get the can extension that doubles capacity. I'd suggest checking it 3-4K miles with the extended capacity. I was hoping I could make it between 6K oil changes without emptying the catch can with the extension, but the first time I tried it, it was totally full.

 

[tommysf13]

From a 2022 6.2 just under 10,000. I installed the catch can around 1000 miles and checked it at 8000 and it was full. I'll be checking it more frequently from now on.

I have a 19 TB custom 5.3 and I empty it 2500-3000 mi. w/orig. can.

 

[GJA]

Any worries using these in winter in the Northeast? Wondering if condensation would be a concern.

 

[Stormin08]

i have the extended body, it fills the original can at 6K miles.

 

[yandy85]

Any worries using these in winter in the Northeast? Wondering if condensation would be a concern.

I heard colder weather equals worse condensation. Could always get an extender like with J&L which I believe is the rename of JLT.

 

[Stormin08]

i have the extended body, like i said...warm southern climates, it fills the original can within 6K miles

 

[clstark7]

I have found emptying every 2000mi. has been ok. Emptied today and was a bit fuller at about 2500mi.

Mine looks like that too when it's winter blend fuel season.

 

[hawk99gt]

Has anyone watched Lonestar Hawaiin on YouTube some months back when he completely tore apart his 5.3 TB to do full AFM/DFM delete and cam replacement? He had a JLT
catch can on it for I think 60k miles. Anyway when he tore apart the engine the cams and lifters had a lot of scoring on them and there was quite a bit of build up where he thought was going to be semi clean. Which was a total bummer for him.

 

[Stormin08]

the scoring was most likely from the failure of the lifters, the catch can is only going to attempt to keep the back of the valves cleaner....any moisture or condensation can still cause issues in low valleys