mellowvision
NAXJA Forum User
- Location
- Brooklyn NY
So, last year, you all helped me figure out some details of rebuilding a 4L for my 89. It had been running pretty strong since october, and this summer has seen a lot of long drives.
On friday night, I drove up to boston from ny on 95, and made REALLY good time. I was having a ton of fun, pushing it. It felt good. When I got to MA, it was idling a bit rough, but not out of control.
In the morning I noticed a puddle of oil under it, and that the drivers side of the truck was soaked with oil under there. I was heading to my mechanic's hosue, so I didn't get overly concerned. When I got to the end of the block and steped on the gas, I looked down to watch the oil pressure gauge drop to zero.
When lightly accelerating or idling, the pressure was ok, 20-40 range. At steep acceleration, 0. I drove less than a quarter of a mile to the mobil station and she took 5 quarts of oil. Was smoking out the dipstick and valve cover.
I drove it to my buddies place, it kept the oil and drove ok. A little rough in the idle.. I did an oil and filter change, no problems. Looked in the air box for kicks, and the k&n is soaked with oil, the box looks like it had been full and emptied, and under the box is totally soaked. the breather line is soaked at the joints.
So, problem one seems to be loosing oil from the dipstick, breather and valve cap.
We check compression. 150-175 across the first 5, but the rear most cylindar gets less than 75psi. We button it back up and start it, pull that plug, no noticable difference.
At this point, I still needed to drive a little bit, and drove it probably 2 more 40 minute drives, trying not to abuse it. By the time I left it at the shop, it had developed a knocking that sounded like my old hydrolocked motor that this one replaced. Not as loud, not all the time, but usually present at idle and light acceleration.
My buddy brought it by another local shop where the machinist is a jeep fanatic, and he thought it sounded like I spun a bearing due to lack of lubrication.
so, at this point, I figure, I have problems with the breather, a clog somewhere that is forcing the oil out, either a slipt bearing, or a problem with a valve or something, potentially blown rings, and who knows what else.
How do I go about finding and curing the original problem, and what should I be looking for? We haven't had the chance to take the pan off for an inspection, but I'm still curious to hear opinions on potential causes, problems to look for, and what I should be considering for repairs at this point.
sorry bout the long post, I had to get it off my chest.
On friday night, I drove up to boston from ny on 95, and made REALLY good time. I was having a ton of fun, pushing it. It felt good. When I got to MA, it was idling a bit rough, but not out of control.
In the morning I noticed a puddle of oil under it, and that the drivers side of the truck was soaked with oil under there. I was heading to my mechanic's hosue, so I didn't get overly concerned. When I got to the end of the block and steped on the gas, I looked down to watch the oil pressure gauge drop to zero.
When lightly accelerating or idling, the pressure was ok, 20-40 range. At steep acceleration, 0. I drove less than a quarter of a mile to the mobil station and she took 5 quarts of oil. Was smoking out the dipstick and valve cover.
I drove it to my buddies place, it kept the oil and drove ok. A little rough in the idle.. I did an oil and filter change, no problems. Looked in the air box for kicks, and the k&n is soaked with oil, the box looks like it had been full and emptied, and under the box is totally soaked. the breather line is soaked at the joints.
So, problem one seems to be loosing oil from the dipstick, breather and valve cap.
We check compression. 150-175 across the first 5, but the rear most cylindar gets less than 75psi. We button it back up and start it, pull that plug, no noticable difference.
At this point, I still needed to drive a little bit, and drove it probably 2 more 40 minute drives, trying not to abuse it. By the time I left it at the shop, it had developed a knocking that sounded like my old hydrolocked motor that this one replaced. Not as loud, not all the time, but usually present at idle and light acceleration.
My buddy brought it by another local shop where the machinist is a jeep fanatic, and he thought it sounded like I spun a bearing due to lack of lubrication.
so, at this point, I figure, I have problems with the breather, a clog somewhere that is forcing the oil out, either a slipt bearing, or a problem with a valve or something, potentially blown rings, and who knows what else.
How do I go about finding and curing the original problem, and what should I be looking for? We haven't had the chance to take the pan off for an inspection, but I'm still curious to hear opinions on potential causes, problems to look for, and what I should be considering for repairs at this point.
sorry bout the long post, I had to get it off my chest.
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