GM Factory Catch Can

300 Blackout · March 17, 2019

I’m looking to see if anyone knows what the part number is for the GM catch can that’s attached to the LT1 E-Rod engine (12682080).

I’m also interested in general info about how it works. Based on the description provided for this engine, it sounds like it returns whatever it catches back to the oil sump through the bank 2 valve cover.

1SLOW1500 · March 17, 2019

I can pull it up. But why. Different engine and different crank pressure. Not that those dont have issues but still. Only part I want off those engines is the electric booster pump. And if it was a lt4 the injectors and hpfp.

300 Blackout · March 17, 2019

Mostly out of curiosity how GM sets up a catch can. The fuel pump on the LT4 is sweet. I also like the idea of adding port injection. Keeps the intake valves cool and clean and cylinder temps down being able to run E-85 with boost. Big bucks though.

qwank · March 18, 2019

57 minutes ago, 300 Blackout said:

Mostly out of curiosity how GM sets up a catch can. The fuel pump on the LT4 is sweet. I also like the idea of adding port injection. Keeps the intake valves cool and clean and cylinder temps down being able to run E-85 with boost. Big bucks though.

it's bolted in between the waterpump and block, and it drain back into the oil pan

h

SS502 · March 18, 2019

6 minutes ago, qwank said:

it's bolted in between the waterpump and block, and it drain back into the oil pan

h

No matter how it’s routed, is the idea to keep the nasty stuff from being sucked back through the intake/valves? If it is being put back into the pan, I wonder if the OLM system can identify degraded oil? I assume if that stuff is being mixed back into the normal oil supply it will degrade that said oil supply faster than normal...

300 Blackout · March 18, 2019

it's bolted in between the waterpump and block, and it drain back into the oil pan

Perfect! That’s exactly what I was looking to see. Thank you!

Based on the location and shape of the canister, it seems it would stay quite warm, promoting evaporation of water and fuel while allowing mostly oil to return to the oil pan. I also wonder what the impact on oil life and performance are to have this returned to the pan. As long as the engine isn’t subjected to constant short trips and is run on the highway regularly, my guess is most of the fuel and water vapor will get burned off. Interesting.

kgkern01 · March 19, 2019

On 3/17/2019 at 7:24 PM, 1SLOW1500 said:

I can pull it up. But why. Different engine and different crank pressure. Not that those dont have issues but still. Only part I want off those engines is the electric booster pump. And if it was a lt4 the injectors and hpfp.

The LT1 is identical to the L86 other than intake and exhaust manifolds, so how is it that different of an engine and crank pressure?

1SLOW1500 · March 19, 2019

I said lt4 not lt1. The lt4 is a different animal all together.

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Nitrousbird · March 19, 2019

4 hours ago, 1SLOW1500 said:

I said lt4 not lt1. The lt4 is a different animal all together.

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No, you stated "if it was a LT4" after your initial statement, indicating the previous motors you were talking about were not a LT4.

1SLOW1500 · March 19, 2019

Oh yes i see how that reads now. Well not to start a debate but lt1 and l86 have more different parts, but not the point.
Ok lt4 electric pump assembly. But there are $220 optional kits out there for this. So retrofitting the lt4 isn't work the effort. Still thinking would be cool a all gm bolt in option.

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