99 Spark, Fuel, Crank! No start!!
Thread Starter
Member
Joined: Jul 2012
Posts: 115
Likes: 0
From: Albuquerque, New Mexico
Year: 1999
Model: Cherokee
Engine: 4.0L Inline 6
Alright, an update. I got a better compression tester today (oreilly) and got the actual readings.
1: 70
2: 35
3: 20
4: 35
5: 0-10
6: 30
Any thoughts? What's weird is that it's not throwing me a check engine
1: 70
2: 35
3: 20
4: 35
5: 0-10
6: 30
Any thoughts? What's weird is that it's not throwing me a check engine
CF Veteran
Joined: Aug 2011
Posts: 10,489
Likes: 24
From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
There's a "wet" test. You put a good tablespoon, (or two), of oil in the holes and go over again. If the number doesn't change it's leaking up top, if it comes up it was leaking past the rings. You can google it or probably see it done on U-tube for a more complete description . "wet/dry compression test" It IS nice to have those two sets of #" when you pull the head and get into figuring out exactly where you stand.
Thread Starter
Member
Joined: Jul 2012
Posts: 115
Likes: 0
From: Albuquerque, New Mexico
Year: 1999
Model: Cherokee
Engine: 4.0L Inline 6
There's a "wet" test. You put a good tablespoon, (or two), of oil in the holes and go over again. If the number doesn't change it's leaking up top, if it comes up it was leaking past the rings. You can google it or probably see it done on U-tube for a more complete description . "wet/dry compression test" It IS nice to have those two sets of #" when you pull the head and get into figuring out exactly where you stand.
CF Veteran
Joined: Aug 2010
Posts: 1,168
Likes: 4
From: Williamsport, Pa
Year: 1997
Model: Cherokee
Engine: 4.0L
Explain: did the Jeep overheat when the radiator cap came off? What was happening that would cause the cap to come off?
If those numbers are accurate, then no. It's not worth doing a wet test. Buy a new motor.
If those numbers are accurate, then no. It's not worth doing a wet test. Buy a new motor.
Thread Starter
Member
Joined: Jul 2012
Posts: 115
Likes: 0
From: Albuquerque, New Mexico
Year: 1999
Model: Cherokee
Engine: 4.0L Inline 6
I'd rather buy a new jeep and part this one out. It's got some body damage... I'll have to consider my options
Thread Starter
Member
Joined: Jul 2012
Posts: 115
Likes: 0
From: Albuquerque, New Mexico
Year: 1999
Model: Cherokee
Engine: 4.0L Inline 6
Ok, what should I do now? I don't think that it could be something wrong with my valves because I got a valve job done on my new head less than a year ago... But then again I could be wrong.
What would it be if it isnt the valves? Piston seals or something like that? I don't mind doing an engine rebuild or anything like that. Can somebody tell me if it would be economical or even feasible to try and repair this? Or would it be better to find a new jeep and part out this one?
What would it be if it isnt the valves? Piston seals or something like that? I don't mind doing an engine rebuild or anything like that. Can somebody tell me if it would be economical or even feasible to try and repair this? Or would it be better to find a new jeep and part out this one?
CF Veteran
Joined: Aug 2011
Posts: 10,489
Likes: 24
From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
I'm the guy who the neighborhood kids came to to have their training wheels removed in 1970. "best of luck, watch out for Chrysler's"
You "baked" it?.... Fine. I get that stuff that it's attached to it is somewhat "smashed up" (body damage).
The 4.o might be pretty tough. Did you do 5 or seven cranks with that meter?, (on the second meter that maybe worked). Your numbers are odd.
Those of us looking for a good "short block" , At the JY just love it when somebody, "throws in the towel" to soon.
DO A GOOD WET/DRY TEST, (MAYBE WITH HELP. If the numbers don't change allot just the head?????
How many miles on the odometer? These are tough motors. Yea, maybe best to just move on, but you ARE here, and my .o2 is to diagnose the "pathology"


You "baked" it?.... Fine. I get that stuff that it's attached to it is somewhat "smashed up" (body damage).
The 4.o might be pretty tough. Did you do 5 or seven cranks with that meter?, (on the second meter that maybe worked). Your numbers are odd.
Those of us looking for a good "short block" , At the JY just love it when somebody, "throws in the towel" to soon.
DO A GOOD WET/DRY TEST, (MAYBE WITH HELP. If the numbers don't change allot just the head?????
How many miles on the odometer? These are tough motors. Yea, maybe best to just move on, but you ARE here, and my .o2 is to diagnose the "pathology"



Last edited by DFlintstone; Mar 25, 2013 at 04:13 AM.
CF Veteran
Joined: Aug 2011
Posts: 10,489
Likes: 24
From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5



