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Old 02-28-2016, 08:08 AM
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Join Date: Jan 2016
Posts: 33
jeep malaise

Hello jeepers.I just got a jk recently 4 door,2007.....

My advice to newer jeepers.

I have had many jeeps in life....Rebuilt and have done mechanical restorations on about 5 jeeps....Tj's and yj's....

This is my first jk.

Thats being said...I have changed my approach with jeeps over the years....

This jk has some oil obviously leaking from the rear passenger side valve cover where it meets the head.

It has 144,000 on it.

That being said,not knowing its history ....

I will simply be changing all fluids....

doing some preventative maintenance....

Changing the timing chain,some pulleys seem loud...

Got a water pump real cheap so going to replace that...

I have the clock spring I believe needs changing...

The coolant tower attached to the thermostat is leaking...I will fix that.I may actually clean the outer edges of it with acetone and put literal rtv around the outside edges of it too to seal it.

The intake gaskets I believe are not actually leaking.Who knows they may have already been replaced.

A head gasket on drivers saide may have been repaired as the gasket atleast that is sticking out around the edges looks brand new and is not dirty...

I have changed my approach with jeeps over the years.They are going to leak.All vehicles leak and will fail over a period of time.

If you see a leak,dont sweat it.Remain calm.

How bad is it leaking???

So with this jeep I will repair what needs to be repaired.

As always simply monitor fluids often....

Check your radiotr fluid and oil from time to time making sure it is not milky looking which is a sympton of a head gasket....and jeep on.

Jeeps are going to leak.Inform yourselves mechanically about vehicles about what is exceptable and what is not exceptable.

What you can get away with and what you cant.Just because something is leaking does not necassarily mean it requires immediate repair.As I have learned with the yj and tj rear main seals.They seem like they are going to leak no matter what you are going to do.As long as its not to bad effecting engine pressure and marring up the driveway too much,you can live with them.Dont freak out.

I actually do have a yj and tj that are not leaking from the rear main seals right now....I believe its because I meticulously prepared the surfaces and one jeep after repairing the main seal I left it sit for a weak after firing it up which I believe gave the rtv plenty of time to cure.I bet the failure rates of yj's and tj's rear main seal failures after immediate repair and firing right up after applying fresh rtv is high.

So anyhoo,its a jeep,all vehicles leak.What can you live with and what to live without.I might just live with this valve cover leak for a while before I decide to crawl in the back of the 3.8 that is shoved back in the jk engine tunnel...lol!!!!

Does the thinner oil for jk's the 5w 20 actually encourage leaks?I am also going to repair the power steering whine by replacing the resevior that holds the fluid,hopefully that is just a clogged filter in the reseviour keeping fluid from the pump......

I might throw some 5w30 in it,or even 10 30 to see how that would effect any engine leaks....

This thing at 144,000 makes absolutley no engine noise....

Jeep on.

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Old 03-04-2016, 06:44 PM
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Quote:
Originally Posted by jawnee View Post
Hello jeepers.I just got a jk recently 4 door,2007.....

My advice to newer jeepers.

I have had many jeeps in life....Rebuilt and have done mechanical restorations on about 5 jeeps....Tj's and yj's....

This is my first jk.

Thats being said...I have changed my approach with jeeps over the years....

This jk has some oil obviously leaking from the rear passenger side valve cover where it meets the head.

It has 144,000 on it.

That being said,not knowing its history ....

I will simply be changing all fluids....

doing some preventative maintenance....

Changing the timing chain,some pulleys seem loud...

Got a water pump real cheap so going to replace that...

I have the clock spring I believe needs changing...

The coolant tower attached to the thermostat is leaking...I will fix that.I may actually clean the outer edges of it with acetone and put literal rtv around the outside edges of it too to seal it.

The intake gaskets I believe are not actually leaking.Who knows they may have already been replaced.

A head gasket on drivers saide may have been repaired as the gasket atleast that is sticking out around the edges looks brand new and is not dirty...

I have changed my approach with jeeps over the years.They are going to leak.All vehicles leak and will fail over a period of time.

If you see a leak,dont sweat it.Remain calm.

How bad is it leaking???

So with this jeep I will repair what needs to be repaired.

As always simply monitor fluids often....

Check your radiotr fluid and oil from time to time making sure it is not milky looking which is a sympton of a head gasket....and jeep on.

Jeeps are going to leak.Inform yourselves mechanically about vehicles about what is exceptable and what is not exceptable.

What you can get away with and what you cant.Just because something is leaking does not necassarily mean it requires immediate repair.As I have learned with the yj and tj rear main seals.They seem like they are going to leak no matter what you are going to do.As long as its not to bad effecting engine pressure and marring up the driveway too much,you can live with them.Dont freak out.

I actually do have a yj and tj that are not leaking from the rear main seals right now....I believe its because I meticulously prepared the surfaces and one jeep after repairing the main seal I left it sit for a weak after firing it up which I believe gave the rtv plenty of time to cure.I bet the failure rates of yj's and tj's rear main seal failures after immediate repair and firing right up after applying fresh rtv is high.

So anyhoo,its a jeep,all vehicles leak.What can you live with and what to live without.I might just live with this valve cover leak for a while before I decide to crawl in the back of the 3.8 that is shoved back in the jk engine tunnel...lol!!!!

Does the thinner oil for jk's the 5w 20 actually encourage leaks?I am also going to repair the power steering whine by replacing the resevior that holds the fluid,hopefully that is just a clogged filter in the reseviour keeping fluid from the pump......

I might throw some 5w30 in it,or even 10 30 to see how that would effect any engine leaks....

This thing at 144,000 makes absolutley no engine noise....

Jeep on.
UPDATE:I got in there and got real dirty......I decided to get an upper engine gasket kit and just go for the gusto.I believe drivers side only head gasket has been done,slight leakage from lower intake gasket....I am used to the 4.0's and the 4.2....After all the work it took just to get to the timing chain,I figure I am going to hit everything at once.

It might be ok the way it was,but I may be taking some long range trips and dont want to chance it.I thought I heard perhaps a slight whining sound which was hard to pin point,it may be the power steering but the timing chain at 144,000 if original, as I had seen turn marks already on the crankshaft bolt,perhaps it was changed but I doubt it.On the slack side it moved 1.25 inches and you could literally move the timing chain up and down,not laterally...up and down it had slack and drooped vertically.LOL

This is my first time busting open a 3.8 with that timing cover design on the front.I am used to the old style of a very simple timing chain cover.I hated taking the oil pan off to get the timing cover off and messing with the accessories.The piston bores look pretty good and the etching of the bores looks great.

It was easy to find top dead center with the oil pan off and seeing the ist cylinder obviously easily,as I had turned the crank a bit as it spun with the 3 finger puller.Lining up the timing marks kept screwing with my brain as I made sure they lined up correctly.

I could only imagine working at chrysler and working on these daily.Chrysler mechanics probably feel like postal workers...lol

I am used to the old bolt holes on the crank damper....I had to do some grinding on a three finger puller to get the damper off,since I didnt have the tool for the crank sprocket,that was an adventure with the 3 finger puller.I used the old beat n heat method to get the new crank sprocket on,worked pretty well.I have learned heat and grease is your friend.

I look back in my younger days of jeeping and think of some of the feats I performed in parking lots of apartments I lived in and doing things I wouldnt attempt today because of unforseen things like broken bolts,bad threads,parts etc....

Oh to be foot loose and fancy free again.

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Old 03-04-2016, 07:23 PM   #3
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There was a time all of that would have sounded fun.
I've reached the stage that just the idea of getting a new rig ALMOST sounds like more work than it's worth.
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Old 03-05-2016, 08:15 PM
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Quote:
Originally Posted by jawnee View Post
UPDATE:I got in there and got real dirty......I decided to get an upper engine gasket kit and just go for the gusto.I believe drivers side only head gasket has been done,slight leakage from lower intake gasket....I am used to the 4.0's and the 4.2....After all the work it took just to get to the timing chain,I figure I am going to hit everything at once.

It might be ok the way it was,but I may be taking some long range trips and dont want to chance it.I thought I heard perhaps a slight whining sound which was hard to pin point,it may be the power steering but the timing chain at 144,000 if original, as I had seen turn marks already on the crankshaft bolt,perhaps it was changed but I doubt it.On the slack side it moved 1.25 inches and you could literally move the timing chain up and down,not laterally...up and down it had slack and drooped vertically.LOL

This is my first time busting open a 3.8 with that timing cover design on the front.I am used to the old style of a very simple timing chain cover.I hated taking the oil pan off to get the timing cover off and messing with the accessories.The piston bores look pretty good and the etching of the bores looks great.

It was easy to find top dead center with the oil pan off and seeing the ist cylinder obviously easily,as I had turned the crank a bit as it spun with the 3 finger puller.Lining up the timing marks kept screwing with my brain as I made sure they lined up correctly.

I could only imagine working at chrysler and working on these daily.Chrysler mechanics probably feel like postal workers...lol

I am used to the old bolt holes on the crank damper....I had to do some grinding on a three finger puller to get the damper off,since I didnt have the tool for the crank sprocket,that was an adventure with the 3 finger puller.I used the old beat n heat method to get the new crank sprocket on,worked pretty well.I have learned heat and grease is your friend.

I look back in my younger days of jeeping and think of some of the feats I performed in parking lots of apartments I lived in and doing things I wouldnt attempt today because of unforseen things like broken bolts,bad threads,parts etc....

Oh to be foot loose and fancy free again.
This thing has been cracked open before,encountered loose lower intake bolts and one bolt was pretty obviously never tightened.It was up a bit and to hard to loosen on its own was never tightened all the way down.

Was missing a few injector clips....probably not a big deal but still...

Egr line was east to disconect,was either never tightened or came loose on its own.Maybe the gaskets go over time...

Spark plugs definatley need replacing.

Possible fuel rail leakage from fuel sitting on fuel rail.I will be replacing injector seals.(little round black ones)

After pulling that front timing chain accessorie cover with as much work as that was,I felt like I might as well hit the other leaks and do it everything at one shot.

Thought about replacing the oil pump at 144,000.What do you think about replacing the oil pump?It works good.....My gut tells me to just leave it.
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Old 06-22-2016, 10:42 AM   #5
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It sounds like you know your way around an engine or two. Thanks for the info.

Do you have any pics of the progress getting your timing cover off, or can you outline the steps to the best of your memory? I couldn't find a write-up. I have the infamous timing cover leak (I think), and I was going to try to tackle the repair myself.

With 170K on my motor I imagine it is certainly not a bad idea to also replace the timing chain and gears. I know I have to drop the oil pan too, so new gaskets are in order there as well. Any other suggestions while I have that part of the engine exposed?

Thanks in advance for the help and suggestions.

(edit) found this thread with a pic of the timing cover off...I will continue my search for answers there.
https://www.wranglerforum.com/f202/dr...e-1731722.html
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