Windrider
NAXJA Forum User
- Location
- Mansfield, Texas
My little mule appears to be acting up. It went from running like a top to the dreaded misfire on #4 cylinder so bad that it would barely idle. Thought my primary issue was a cracked head, but it turned out to be a bad plug. (See coil rail/ Champion truck plug burn up problem.) I even thought I saw a crack, which I could not find later.
Replaced the 7,000 mile old truck plugs with factory NGK and it ran like a top again. All old plugs were properly gaped, uniform wear, no abnormal signs of soot, none abnormally clean. Coolant loss is barely an index fingers width in the last 6,500 miles / 30 months use which I was ready to attribute to evap of part of the 50/50 mix.
I get some humidity out of the tailpipe at start up, but I wouldn't call it excessive and it goes away as the engine heats up.
After replacing the plugs I took the oil filler cap off while it was running and saw no coolant pulse. There's never been any brown junk in there and the oil hasn't ever looked diluted.
Paranoid person that I am, I did an oil analysis (Napa) and just got the results back.
01 xj with 84,500 miles
1,300 miles and 10 months on the oil.
Mobil1 clean 7,500
Iron = 12
Chromium = 1
Lead = 0
Copper = 3
Tin = 0
Aluminum = 4
Nickel = 0
Silver = 0
Silicon = 20
Boron = 81
Sodium = 384 (Abnormal)
Magnesium = 18
Calcium = 2080
Barium = 0
Phosphorous = 1064
Zinc = 971
Molybedenum = 129
Titanium = 0
Vandadium = 0
Potassium = 0
Fuel = <1%
Visc @ 100C = 9.73
Water% = 0
Coolant = Yes
TAN = 1.1
The recommendation was: No abnormal wear detected. Sodium high. check for source of contamination/monitor unit. Recommend resample at normal interval.
While I'd love to slap a stroker in the Jeep, I'm not that flush at the moment nor do I have time to take the head off until about February.
I'm thinking I should have the cooling system pressure tested and do another oil analysis with 1,000-1,500 miles on the new oil in late January.
That's a really high sodium number. Any suggestions or anybody think I'm going to trash my motor in the next 1,500 miles?
Replaced the 7,000 mile old truck plugs with factory NGK and it ran like a top again. All old plugs were properly gaped, uniform wear, no abnormal signs of soot, none abnormally clean. Coolant loss is barely an index fingers width in the last 6,500 miles / 30 months use which I was ready to attribute to evap of part of the 50/50 mix.
I get some humidity out of the tailpipe at start up, but I wouldn't call it excessive and it goes away as the engine heats up.
After replacing the plugs I took the oil filler cap off while it was running and saw no coolant pulse. There's never been any brown junk in there and the oil hasn't ever looked diluted.
Paranoid person that I am, I did an oil analysis (Napa) and just got the results back.
01 xj with 84,500 miles
1,300 miles and 10 months on the oil.
Mobil1 clean 7,500
Iron = 12
Chromium = 1
Lead = 0
Copper = 3
Tin = 0
Aluminum = 4
Nickel = 0
Silver = 0
Silicon = 20
Boron = 81
Sodium = 384 (Abnormal)
Magnesium = 18
Calcium = 2080
Barium = 0
Phosphorous = 1064
Zinc = 971
Molybedenum = 129
Titanium = 0
Vandadium = 0
Potassium = 0
Fuel = <1%
Visc @ 100C = 9.73
Water% = 0
Coolant = Yes
TAN = 1.1
The recommendation was: No abnormal wear detected. Sodium high. check for source of contamination/monitor unit. Recommend resample at normal interval.
While I'd love to slap a stroker in the Jeep, I'm not that flush at the moment nor do I have time to take the head off until about February.
I'm thinking I should have the cooling system pressure tested and do another oil analysis with 1,000-1,500 miles on the new oil in late January.
That's a really high sodium number. Any suggestions or anybody think I'm going to trash my motor in the next 1,500 miles?