Water in the air filter? 88 MJ

[Luvtohunt]

Checked the air filter today in my 88 MJ and had water in it. It was on the edge nearest the fire wall, about an inch and a half of the filter. Its a 4.0 liter 6 cyl. Any advice? Any explanation?

 

Thank you.

[project88mj]

:hijack:

 

i have a simular problem with oil on my filter can some one address both problems :help:

[HKB3]

Two different problems

Read up on the oil problem here:

http://jeep.off-road.com/jeep/article/articleDetail.jsp?id=257985

Very common with the 4.oh

 

Water in air filter? first step would be to find out where the water is coming from then go from there

[Luvtohunt]

Two different problems

Read up on the oil problem here:

http://jeep.off-road.com/jeep/article/articleDetail.jsp?id=257985

Very common with the 4.oh

 

Water in air filter? first step would be to find out where the water is coming from then go from there

 

Ya, I was trying to figure out where the water would come from, any idea? It appears to be coming from the two small hoses (vacuum lines?) in the back of the air box.

 

Any help would be appreciated.

[project88mj]

could be condinsation?

[Luvtohunt]

could be condinsation?

 

maybe, its not like pure water, its like foam? Any advice?

[DirtyComanche]

Sure it's water?

[project88mj]

color of the foam would help a little if it is yellow to brownish it could be oil? :dunno:

[HKB3]

is the water pre-filter or after the filter?

Maybe some rain/road water got into the air box?

[manche]

you could of had oil in your line and the water may of been sitting on the oil which it would turn to a yellow ish white brown color :smart:

[aemsee]

As your CCV looses it's ability to properly vent the crank case, the engine will begin to push combustion blow by in to the air box. As the water vapor and oil vapor combine it forms a whitish/ brownish foam. Look in the oil fill tube for almost any 4.7 and you will see the same stuff, as thats where the rocket scientists decided to put the PCV valve and the gasses condense on the colder plastic.

[manche]

i should probaly stick a pcv valve on mine i just have a pcv elbow :ack: i get blow by btw wats the big cylinder looking thing on the back of the valve cover were the vacuum hose hooks up :???:

[mfpdm]

i should probaly stick a pcv valve on mine i just have a pcv elbow :ack: i get blow by btw wats the big cylinder looking thing on the back of the valve cover were the vacuum hose hooks up :???:

 

That's a crankcase breather/filter or as the parts manaul calls it, (filter, ventilation valve part# 53002466). Not many auto parts stores carry them but the dealership can get it for you. I just got one from them for $11 if I remember right.

 

:cheers:

[manche]

thx maybe this will help with my fuel economy :cheers: