I have a 4.2 carbureted straight 6 in my 88 YJ. Just redid the fuel pump because I had gas in my oil. However I have the white smoke coming out of the exhaust, my oil is white foam, and in two days I've gone through 3-4 qts of good oil. I'm thinking head gasket and valve seals.
As a beginner at working on vehicles is this going to be impossible for me to fix?
no need in doing a compression test..you either have a blown head gasket or a cracked head..if you run it very much like that you will ruin the entire engine..I don't know your abilities but just by you asking these questions,it might be best to let a shop do it..
Well I bought the jeep as a project to learn on and I'm not spending the money to take it to a shop. I'd rather sell it then do that. I'm capable of working on vehicles but never touched and engine before unless you count the rear main seal.
Park it until you get it fixed. Like HD said, if it's foaming up & you're going thru 3-4 qts of oil in 2 days, you have either have a busted head or a bad gasket. You will ruin it for sure if you keep driving it.
The 4.2 is a pretty stout motor. They can take a LOT of abuse, but don't push it. I'm willing to bet she's pretty tired.
Pull the head & look at the gasket, but if you're going thru that much oil, I bet the head is busted wide open.
My 91 2.5L blew a head gasket and- despite my limited mechanical abilities- I replaced it about a month ago. Get a Haynes or Chilton manual and good set of sockets and wrenches. Drain the oil and antifreeze, pull the valve cover, intake and exhaust manifold (<<<wasn't as tough as I expected), then the head bolts. Ask your buddy for a good machine shop for the head 'cause it's probably cracked/warped, they'll do the valves and all that shiat. Jeep goes back together same way it came apart, just torque all the bolts to spec. It seems intimidating, but it's really not that tough. You got this, man, good luck.
HD is right, the seals have nothing to do with coolant in your oil, leaking seals will make a good puff of smoke on start up, not burn Qts. of oil in just days.
If your not going all the way with rebuilding the head right then do worry about the seals.
Fast and cheap! Lay the windshield back, pull valve cover off, drain every thing, disconnect the head pipe, remove the head bolts, and lift head intake, exhaust and head out in one peace with shop lift. check for where your leak is. if just a head gasket, clean head and block and put it back together.
$14.00 head gasket $40.00 valve cover gasket and your back on the road.
I did this to My old 258 about a year ago, and she still plugging along.
It's not right, but it's how I did it on an engine I hope to replace soon.
The Government can not give anything to anybody that it does not first take from someone else !
The valve stem guide seals are important
In several ways. If they leak if can foul your plugs
Also if you have a weak cylinder the oil that bypasses
And runs down the pushrods thus adds to the cylinder
Allowing it to false compression.
Heads are not that complicated to R/R they are heavy
And you should presoak all bolts on exhaust with a good penetration oil
Prior also include intake.(with plugs in) retorque per specifications
And if you can get assistance with R/R to prevent damage to gasket and
Self that is great.