Cleaning Lower Intake Manifold. Remove? (1 Viewer)

[landtoy80]

Is it worth removing the lower intake manifold to clean out the oil and egr crud?

Is it okay to spray cleaner in the lower manifold and just somehow mop it clean or will the crud just mess up the valves or cylinder?

 

[Creature503]

Do it

 

[Billy Skaggs]

i used a toilet brush from walmart round one. to fit inside tube . and gasoline it strips quick . then was with simple green.

 

[Pin_Head]

Yes, if you also change the pistons and rings. If not, no; it will just come back.

 

[landtoy80]

Yes, if you also change the pistons and rings. If not, no; it will just come back.

I hope not, just put on catch can and turned off the egr. There should be no more crud entering into the intake.

I left the intake on and cleaned up the intake with a flex shaft on a drill with a rag on it with cleaner.

 

[bajaphile]

I would take it off to clean. I've thrown too many codes in the past with "preventative cleaning"...

Problem is it will take you a full day to take it off and on. I've never done it, but it appears to be time consuming, but obviously do-able.

 

[Pin_Head]

I hope not, just put on catch can and turned off the egr. There should be no more crud entering into the intake.

The catch can and plugging the EGR are removing just a spit in the bucket of all the blow by from worn rings that ends up on your intake runners. Other than ugly, it doesn't mean anything anyway.

Save your time and money for something important.

 

[97lx450guy]

Worth the time to remove lower mani? Just got off the upper and fuel rail. Any advice? Looks like poo

 

[inkpot]

I have my head oddbto fix a valve problem. Lower intake is just hanging there, all dirty and nasty, and I'll be damned if I will take it off just to clean it up. It would just git dirty again.

 

[richardlillard1]

I have my head oddbto fix a valve problem. Lower intake is just hanging there, all dirty and nasty, and I'll be damned if I will take it off just to clean it up. It would just git dirty again.

Mine was worse than yours. What's my prize?

 

[jpoole]

I wanted to clean mine without dumping crud into the headless engine and after looking at it decided to use the sawzall method to ease lower manifold removal:

FZJ80 lower intake removal by sawzall

Makes it easy if you have the head off already though you may not be that far in.

 

[landtoy80]

The catch can and plugging the EGR are removing just a spit in the bucket of all the blow by from worn rings that ends up on your intake runners. Other than ugly, it doesn't mean anything anyway.

Save your time and money for something important.

My blow-by ended up being just an undersized PCV hose with an even smaller hose connector I installed to hook up the catch can.
A proper size hose fixed the problem. It was like trying to suck a golf ball through a garden hose or just like Monica with Bill, the excess has to go somewhere.