Author Topic: Need Engine Help (Read 2986 times)

Gunslinger · « **on:** January 17, 2007, 09:00:39 PM »

The jeep was runnin fine until a few days ago. I changed the oil like I allways do using a known brand two weeks ago (penzoil I think but usually I use castrol syntec blend). It got COld the last few days and the jeep ran fine this morning but when I started it up this afternoon it was puttering really badly. It sounded like the timing was way off. I drove it home tonite and while it drove "OK" it was puttering and really rough at Idle.

For grins I popped open the air cleaner and where the oil breather attaches to it there was smoke coming out out of it. There was also some oil on my air filter. The exahuast sounds real rough and puttering.

The only thing that's different is the oil change and the recent freezing temps. I hadn't noticed any pools of antifreeze but the back half of the engine looked like it might have been covered in liquid. I can't tell if that's new or not as I havn't had time to get underneath it. It was also runnin a few degrees hotter than usual.

Any Idears?

Cracked block
Missing cylnder
Timing
Senser

I'm don't even know where to start.

PS for those who aren't familure with my jeep sagas it is a farily new re-manufactrued 4.0 6 Cyl

Donzo · « **Reply #1 on:** January 17, 2007, 09:05:44 PM »

Plugged or stuck PCV valve?

AquaShrimp · « **Reply #2 on:** January 17, 2007, 09:05:51 PM »

Something easy to check, take off the distributor cap and see if there is a white residue inside of it. If there is, your spark might be arcing causing the trouble.

Masherbrum · « **Reply #3 on:** January 17, 2007, 09:06:31 PM »

I have a 304 in my CJ7, and it died up North. I have to retrieve it on Saturday. I had smoke coming out of the breather. For me it is either, thrown rod, hole in a piston or a crankbearing.

for your YJ, I'm guessing a Crank Bearing or a hole in the piston.

Gunslinger · « **Reply #4 on:** January 17, 2007, 09:11:32 PM »

Quote

Originally posted by Masherbrum
I have a 304 in my CJ7, and it died up North. I have to retrieve it on Saturday. I had smoke coming out of the breather. For me it is either, thrown rod, hole in a piston or a crankbearing.

for your YJ, I'm guessing a Crank Bearing or a hole in the piston.

OUCH!

WTF would cause that?

Gunslinger · « **Reply #5 on:** January 17, 2007, 09:12:31 PM »

Quote

Originally posted by Donzo
Plugged or stuck PCV valve?

It doesn't have one.

It has a tube in the aft end of the valve cover that connects the vacume on the air intake manifold and a breather hose that runs to the air cleaner.

Bronk · « **Reply #6 on:** January 17, 2007, 09:14:51 PM »

Was the penzoil synthetic also?

Bronk

Edit: Valve seals or Rings . See if plugs are getting oil fouled.

Liquid could mean head gasket or cracked head.

Gunslinger · « **Reply #7 on:** January 17, 2007, 09:26:58 PM »

Quote

Originally posted by Bronk
Was the penzoil synthetic also?

Bronk

Edit: Valve seals or Rings . See if plugs are getting oil fouled.

Liquid could mean head gasket or cracked head.

Liquid as in OIL? I can't remember if I used synthetic right now. When I bought it they where out of castro in the 5 qt bottle so I bought the stuff formulated for SUVs and Trucks.

Refresh my memory the engine consists of

Head
Block
Crank

and the head gasket would be at the top of the motor?

Like I said it looked like the back end and the bell house was coved in liquid but I couldn't tell what it was, it's dark and I was in my blues so I didn't want to get dirty.

It also sounds like I got an exhaust leak.

GAWD I hope it's not a cracked block.....

SmokinSS · « **Reply #8 on:** January 17, 2007, 09:29:40 PM »

Quote

Originally posted by Gunslinger
It doesn't have one.

It has a tube in the aft end of the valve cover that connects the vacume on the air intake manifold and a breather hose that runs to the air cleaner.

If I am not mistaken that is your PCV. Might also want to check your fuel. Could be a clogged fuel filter or water in the fuel.

Bronk · « **Reply #9 on:** January 17, 2007, 09:30:40 PM »

Pull dipstick and see if oil is milky. If it is coolant is getting in.
That would be cracked head/blown head gasket.

Liquid in first post meant coolant.

Head gasket is in between the block and the head.

You said you had a recent cold snap. Did you have the proper coolant mix?

Bronk

Gunslinger · « **Reply #10 on:** January 17, 2007, 09:32:13 PM »

Quote

Originally posted by SmokinSS
If I am not mistaken that is your PCV. Might also want to check your fuel. Could be a clogged fuel filter or water in the fuel.

Yes you are right it is the PCV but it's just basically a tube....no valve or anything.

I thought of the water and added some HEAT tm to the tank today as I heard that stuff works wonders but I'll wait and see.

The crappy part is I HAVE to drive it to work tommorrow, no choice in the matter so if I break it, I break it.

rpm · « **Reply #11 on:** January 17, 2007, 10:04:11 PM »

Just a blind guess, but it sounds like it could be a dirty fuel filter and a clogged PCV.

Gunslinger · « **Reply #12 on:** January 17, 2007, 11:00:00 PM »

Quote

Originally posted by rpm
Just a blind guess, but it sounds like it could be a dirty fuel filter and a clogged PCV.

Might be on to a cheap fix here, I don't remember the last time I changed the filter. ould the cold effect it somehow?

Bronk · « **Reply #13 on:** January 17, 2007, 11:13:56 PM »

Water trapped in filter would freeze causing blockage .
Or just dirty and cold is coincidental.

Bronk

rpm · « **Reply #14 on:** January 17, 2007, 11:23:52 PM »

The cold would cause ice, filter traps the ice. The bottle of Heet you just dumped in the gas should disperse any remaining water, but I'd change the filter anyway. The engine running rough could cause it to spit out some oil in the blow by. Nothing to panic about, yet.