LS Intake Question (This is FJ62-related) (1 Viewer)

[adman02]

I'm in the middle of swapping an LS into my FJ62. The donor engine is an LM7 from a 2006 Yukon. There's some differences with this engine (e.g,. return-less fuel rail, hydroboost PS pump, different bolt pattern for the oil pan, etc.)

My question is about the vacuum ports, though. I know there's one at the back of the engine for the brake booster. BUT, there's another about midway on the passenger side of the intake. Traditionally, you can break off a plastic tab and voila - you have a vacuum port nipple. With my engine, though, there's no plastic nipple - just a steel block off plug. I need to know the size of that plug so I can buy a fitting. This will power my xfer case vacuum system. 1/4 in is too small; 3/8 seems too big.

Any guesses on size?

Update - I'm an idiot. Disregard.

 

[Dubs2017]

Got a pic? I won't be much help since I have geniii, but seems like ICTBillet sells a bunch of those types of parts. Might be worth giving them a ring if no one here knows.

 

[cruisermatt]

i like to use a tee off the brake booster hose.

 

[adman02]

I'm in the middle of swapping an LS into my FJ62. The donor engine is an LM7 from a 2006 Yukon. There's some differences with this engine (e.g,. return-less fuel rail, hydroboost PS pump, different bolt pattern for the oil pan, etc.)

My question is about the vacuum ports, though. I know there's one at the back of the engine for the brake booster. BUT, there's another about midway on the passenger side of the intake. Traditionally, you can break off a plastic tab and voila - you have a vacuum port nipple. With my engine, though, there's no plastic nipple - just a steel block off plug. I need to know the size of that plug so I can buy a fitting. This will power my xfer case vacuum system. 1/4 in is too small; 3/8 seems too big.

Any guesses on size?

Disregard. I'm an idiot.

Hole was 1/4 NPT –– I mistook a 1/8 NPT plug for a 1/4 NPT, which is why I thought 1/4 was too small.