Good Morning,
If anyone can help me make a decision on my test results I would highly appreciate it. Test was done due to a knocking with high miles (206k miles). It is a 2004 LJ with 206k miles but was well maintained by previous owner. Motor still has plenty of power, good oil pressure and water temp never exceeds 210. After reading numerous threads in what the knocking can be (piston slap/lifters/cam/bent push rod/ect....) I decided to share my test results in the hope that i can get a little help in making a decision to rebuild engine or just the head. I was amazed on the compression considering the miles.
Finished testing compression test and leak test, these were the results.
If anyone can help me make a decision on my test results I would highly appreciate it. Test was done due to a knocking with high miles (206k miles). It is a 2004 LJ with 206k miles but was well maintained by previous owner. Motor still has plenty of power, good oil pressure and water temp never exceeds 210. After reading numerous threads in what the knocking can be (piston slap/lifters/cam/bent push rod/ect....) I decided to share my test results in the hope that i can get a little help in making a decision to rebuild engine or just the head. I was amazed on the compression considering the miles.
Finished testing compression test and leak test, these were the results.
Compression ————--Leak down test-————————————-Air flow detected at:
#1 165-———————--100psi in/ 88psi reading. 12%———--valve cover/oil dip stick
#2 165-————————-/ 92 8%——————————————--valve cover
#3. 160-———————-/ 82 18%——————————————-valve cover/oil dip stick
#4. 168-———————/ 94 6%——————————————-valve cover
#5. 170-———————/ 90 10%—————————————--valve cover/oil dip stick
#6 160-—————/ 60 40%—————————————--valve cover/oil dip stick/exhaust
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