sound like a head gasket?
07-19-2012, 12:47 PM
#1
Junior Member
Thread Starter
Join Date: Apr 2011
Posts: 71
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
sound like a head gasket?
I just checked compression last.night on my 96 4.0 my results were
148
130
118
149
150
147
1-6 took 3 cranks to get those readings last 3 jump right up to pressure. Did the same check with oil and nothing.changed for those cylinders. I check it because I've been having a real rough idle that i just can't shake.
148
130
118
149
150
147
1-6 took 3 cranks to get those readings last 3 jump right up to pressure. Did the same check with oil and nothing.changed for those cylinders. I check it because I've been having a real rough idle that i just can't shake.
07-19-2012, 01:13 PM
#2
CF Veteran
Join Date: Apr 2009
Posts: 4,734
Likes: 0
Received 9 Likes
on
9 Posts
Year: 2015, 2012
Model: Grand Cherokee (WK2)
Engine: 3.6L
Difference between highest and lowest is more than 40 PSI. Could be a ring or valve seal problem.
Unexplained coolant loss, OTOH, is one of the first indicators of a possible bad head/gasket.
Unexplained coolant loss, OTOH, is one of the first indicators of a possible bad head/gasket.
07-19-2012, 01:19 PM
#3
CF Veteran
Join Date: Aug 2011
Location: Nor-Cal Coast
Posts: 10,489
Likes: 0
Received 17 Likes
on
17 Posts
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
Two low readings side by side, that don't come up wet...Yes. 130 is isn't that low though. My 02, yea, something is up, I wouldn't rule out a valve though. Exhaust valves have a tough job.
I just put compressed air to the plug hole on my Onan generator and could hear a hiss out the exhaust. (next thing you know I'm gonna have a hose in my 02 sensor bung, held to my ear!)
You cleaned your IAC on the TB? (and the TB?) How many miles?
I just put compressed air to the plug hole on my Onan generator and could hear a hiss out the exhaust. (next thing you know I'm gonna have a hose in my 02 sensor bung, held to my ear!)
You cleaned your IAC on the TB? (and the TB?) How many miles?
Thread
Thread Starter
Forum
Replies
Last Post
seanie11
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
11
09-11-2015 04:42 AM
Azzy
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
0
09-08-2015 10:49 PM
Silentj
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
7
09-06-2015 08:46 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
