GM 4300 Air Filter Housing

[Drew99GT]

Has anyone had the pleasure of trying to get at the air filter in a later model GM 4300??? The fuse box and the upper rad hose are so much in the way that I have to break down the entire air intake assembly from throttle body onwards to get at it. Have to remove the fuse box cover as well. What a PITA! Talk about ten minute jobs that take a half hour or more.

When my pops used to get his vehicle serviced at a local garage, they could NEVER EVER get the filter in there seated properly with all the bolts tightened up on the airbox lid. They would try and just pry the lid up and out of the way and usually end up damaging the gasket and creating major air leaks past the filter.

Rant off.

 

[Slick 55]

Changing the air filter is one reason I don't miss my S-10.

 

[Triple_Se7en]

The 99' model is not difficult at all. Just loosen the round clamp in front of the filter box - then use long pliers to turn the screw-downs.

What I want to know is where the PC Valve is? I've got 80K with synthetic oil changed every 6K - so I know it's about ready for a change - despite the engine being so clean. Where is it hiding? Is it below that strange looking black water pipe-looking thing that sticks straight up in the air & leads down into the valve cover? I need to get a Chilton book on this engine.

 

[JHZR2]

My 98 isnt bad at all either... Yes, the corner of the cover is actually underneath of the radiator hose, requiring a bit of flex on the hose and the air pipe to get the cover out of the way, but other than that, no issues.

I just dont do it with the engine hot, and all is well, no problems. Seems to seat fine too...

JMH

 

[Drew99GT]

Hmmmm, I dunno why my it's so hard to get at on my Dad's 98.

777, the PCV valve is located on the drivers side valve cover, just about directly below where the rubber air intake hose hooks into the plastic elbow that hooks onto the throttle body.

 

[JTK]

My 1998 K1500 W/T wasnt *too* bad IIRC. They really have over-complicated air filter housings now. The filter r/r process for my GM atlas 4.2L is easy, but the housing and intake duct has several funky 'sound silencing' holes and chambers you have to worry about lining up so they seal off.

I kinda miss the old doughnut filters/housings.

Atleast you could flip the cover for a 'high-performance' sound.

Joel

 

[Triple_Se7en]

Thanks Drew! It on my list to replace once I fix my discharging problem. I think the alternator pooped-out on me. Gonna have it tested.

 

[Drew99GT]

FWIW, I changed PCV valves on my pops truck at about 170,000 miles (now has 200K), and the original was perfectly clean and rattly like it should be. Vehicle has had dino it's entire life so your PCV is likely squeaky clean and perfectly fine 777.