ramcharger
Dismember
Sorry this is late folks but the day I asked Rumble where I should post this I got some real bad news. Anyway, it's time to get started and offer some help to those who have a Jeep (Hey, it's a Mopar too!). Normally I'd be giving the dogs a their 2 mile walk right now but it's snowing and I'm just getting over a fever so I figure that wouldn't be a wise choice. They get to run around the back yard this morning and get a nice warm towel off when they get done. :-D
I'll start from the beggining here and let you all know how this started:
I bought a '92 Jeep Cherokee Limited with 210K mi. in December of 2008 from money I received after my 4Runner got totalled in front of my house (damn drunk drivers). I got it for $900 bucks, everything worked except the air conditioning and power front drivers seat. It had a "tick" from the valve cover and I thought for sure it was a collapsed lifter as it would come and go, but it hads what I thought was great power compared to the Toy and had room for the dogs.
I drove it for about a year or so and realized that the mileage was pretty poor and I was getting tons of blow-by. So much blow-by that the PCV system was getting clogged and the air filter was getting soaked with oil. Oil consumption was about a 1 qt. every 500 miles or so too. I decided to just pull the engine and a do a re-ring as well as change out all the lifters and replace the rear seal too as these always leak on these 4.0's.
Well, this is what I found once I tore it down. Two pistons were destroyed and the factory header was cracked. I'm stunned that it ran as well as it did. I can only make an educated guess as to what caused this. Most certainly it was detonation but what caused the detonation? Well, the Jeep has a giant class IV hitch with the large round trailer connector and it was originally from Lousiana, so I'm thinking that someone was towing a really big boat and trailer with this thing and running crappy gas to boot. This engine had a hard life and for it to keep running this long is amazing anyway.
I'll start from the beggining here and let you all know how this started:
I bought a '92 Jeep Cherokee Limited with 210K mi. in December of 2008 from money I received after my 4Runner got totalled in front of my house (damn drunk drivers). I got it for $900 bucks, everything worked except the air conditioning and power front drivers seat. It had a "tick" from the valve cover and I thought for sure it was a collapsed lifter as it would come and go, but it hads what I thought was great power compared to the Toy and had room for the dogs.
I drove it for about a year or so and realized that the mileage was pretty poor and I was getting tons of blow-by. So much blow-by that the PCV system was getting clogged and the air filter was getting soaked with oil. Oil consumption was about a 1 qt. every 500 miles or so too. I decided to just pull the engine and a do a re-ring as well as change out all the lifters and replace the rear seal too as these always leak on these 4.0's.
Well, this is what I found once I tore it down. Two pistons were destroyed and the factory header was cracked. I'm stunned that it ran as well as it did. I can only make an educated guess as to what caused this. Most certainly it was detonation but what caused the detonation? Well, the Jeep has a giant class IV hitch with the large round trailer connector and it was originally from Lousiana, so I'm thinking that someone was towing a really big boat and trailer with this thing and running crappy gas to boot. This engine had a hard life and for it to keep running this long is amazing anyway.