Split Nail WJ Build Thread - Page 57 - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > Grand Cherokee General Discussion > Split Nail WJ Build Thread

New jk doors from steinjagerEliminate Hood Flutter!!!FS: Wrangler RGB Multicolor Fog Light LEDs: Awesome Effect

Reply
Unread 02-14-2011, 06:07 PM   #841
SplitNail
Registered User
1999 WJ 
 
Join Date: Aug 2008
Location: Katy, TX
Posts: 4,015
I put a can of restore in it to see what happens. I wonder if this issue could be in the heads..

__________________
1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids

SplitNail is offline   Reply With Quote
Unread 02-14-2011, 06:23 PM   #842
sherker55
Registered User
2004 WJ 
 
Join Date: Jan 2009
Location: South Jersey
Posts: 834
did you do the compression test yourself? you should put those plugs in the order of the cylinders with bad compression and see if there is any correlation ( i don't know if it matters) only two looked f'd up though, such as discolored, scorched etc...

hopefully that restore **** will work out for you, good luck man

oh, and the platnium plugs are mandatory for the 4.7 HO, but not the 4.7...
sherker55 is offline   Reply With Quote
Unread 02-14-2011, 06:34 PM   #843
SplitNail
Registered User
1999 WJ 
 
Join Date: Aug 2008
Location: Katy, TX
Posts: 4,015
Quote:
Originally Posted by sherker55
did you do the compression test yourself? you should put those plugs in the order of the cylinders with bad compression and see if there is any correlation ( i don't know if it matters) only two looked f'd up though, such as discolored, scorched etc...

hopefully that restore **** will work out for you, good luck man

oh, and the platnium plugs are mandatory for the 4.7 HO, but not the 4.7...
I tossed the plugs. I also did the comp test myself with the help of my mechanic neighbor.
__________________
1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids

SplitNail is offline   Reply With Quote
Unread 02-15-2011, 10:06 AM   #844
SplitNail
Registered User
1999 WJ 
 
Join Date: Aug 2008
Location: Katy, TX
Posts: 4,015
So could this problem be in the heads? I don't have time/money to put a new motor in.
__________________
1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids

SplitNail is offline   Reply With Quote
Unread 02-15-2011, 10:24 AM   #845
tsconver
Registered User
2003 WJ 
 
Join Date: Nov 2007
Location: Durham, North Carolina
Posts: 2,943
you should put a table spoon of motor oil into the plug holes of the cylinders that are low and repeat the test. If the compression comes up to the level of the others then you have worn rings, if not then it is a head gasket or valves or a crack.

When you did the compression check did you have all the plugs out and the throttle wide open?

A leak down check would also help to diagnose. If the oil in the cylinder has no effect then pressurize the cylinder to 150 psi with the piton at TDC and see if it hold pressure. If it doesn't listen/look for where it is loosing it at. If you have air coming out the oil filler or dipstick then it is rings or a crack that goes into a oil passage, if you hear it out the exhaust it is a bad exhaust valve, out the air cleaner it is a bad intake valve, if you see bubbles or fluid is pushed out the radiator fill cap then it is a bad head gasket or a cracked head.
__________________
Speak softly and carry a big stick.

We have room but for one flag, the American flag . . . We have room but for one language, and that is the English language . . . And we have room for but one sole loyalty...and that is a loyalty to the American people. T. Roosevelt 1919

2003 Grand Cherokee 4.0L Laredo

My Build Thread

A few goodies
http://s257.photobucket.com/albums/h...umb55839/jeep/

2001 Kawasaki 1200 ZRX
A few Speed parts, fun to ride
http://www.zrxoa.org/

2006 Red Liberty
Wife's ride, pretty stock
http://i257.photobucket.com/albums/h...mage0008-1.jpg

http://www.cnc4x4.org/

http://www.treadlightly.org/

tsconver is offline   Reply With Quote
Unread 02-15-2011, 10:30 AM   #846
SplitNail
Registered User
1999 WJ 
 
Join Date: Aug 2008
Location: Katy, TX
Posts: 4,015
Quote:
Originally Posted by tsconver
you should put a table spoon of motor oil into the plug holes of the cylinders that are low and repeat the test. If the compression comes up to the level of the others then you have worn rings, if not then it is a head gasket or valves or a crack.

When you did the compression check did you have all the plugs out and the throttle wide open?
Yes all plugs out, but I did not have the throttle wide open. I just turned it over as let it idle for a few seconds.

Quote:
Originally Posted by tsconver
A leak down check would also help to diagnose. If the oil in the cylinder has no effect then pressurize the cylinder to 150 psi with the piton at TDC and see if it hold pressure. If it doesn't listen/look for where it is loosing it at. If you have air coming out the oil filler or dipstick then it is rings or a crack that goes into a oil passage, if you hear it out the exhaust it is a bad exhaust valve, out the air cleaner it is a bad intake valve, if you see bubbles or fluid is pushed out the radiator fill cap then it is a bad head gasket or a cracked head.
Okay, I'll try that test Saturday as see if it is in the heads. I really hope it's a gasket/cracked head/ or valves.
__________________
1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids

SplitNail is offline   Reply With Quote
Unread 02-15-2011, 10:37 AM   #847
tsconver
Registered User
2003 WJ 
 
Join Date: Nov 2007
Location: Durham, North Carolina
Posts: 2,943
Quote:
Originally Posted by SplitNail View Post
Yes all plugs out, but I did not have the throttle wide open. I just turned it over as let it idle for a few seconds.



Okay, I'll try that test Saturday as see if it is in the heads. I really hope it's a gasket/cracked head/ or valves.
you normally want to open the throttle and then crank it until the gauge stabilizes. Repeat it three times and take the average. Try the oil in the cylinder trick too, to see if the rings are worn really bad.
__________________
Speak softly and carry a big stick.

We have room but for one flag, the American flag . . . We have room but for one language, and that is the English language . . . And we have room for but one sole loyalty...and that is a loyalty to the American people. T. Roosevelt 1919

2003 Grand Cherokee 4.0L Laredo

My Build Thread

A few goodies
http://s257.photobucket.com/albums/h...umb55839/jeep/

2001 Kawasaki 1200 ZRX
A few Speed parts, fun to ride
http://www.zrxoa.org/

2006 Red Liberty
Wife's ride, pretty stock
http://i257.photobucket.com/albums/h...mage0008-1.jpg

http://www.cnc4x4.org/

http://www.treadlightly.org/

tsconver is offline   Reply With Quote
Unread 02-15-2011, 10:48 AM   #848
SplitNail
Registered User
1999 WJ 
 
Join Date: Aug 2008
Location: Katy, TX
Posts: 4,015
Quote:
Originally Posted by tsconver

you normally want to open the throttle and then crank it until the gauge stabilizes. Repeat it three times and take the average. Try the oil in the cylinder trick too, to see if the rings are worn really bad.
Okay, I'm debating about wether I should just pay a mechanic to figure it out then I'll decide what to do. It would only be $75 to have them figure it out.
__________________
1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids

SplitNail is offline   Reply With Quote
Unread 02-15-2011, 10:07 PM   #849
85IrocZ-28
Registered User
1999 WJ 
 
Join Date: Jul 2010
Location: Davis County Utah, UT
Posts: 3,925
Or one hour of your time. Pay yourself $75 an hour by doing the test yourself.
__________________
*Project Yeti* 99 JGC Limited 4.7 w/6.5" Rockkrawler LA & IRO A-arm, Goodyear MTR 35's on MB TKO's, 4.56 Yukon's, Iceland Offroad Bumper/Flares/Sliders, Protofab Rear Carrier, SuperChips, Uniden/Firestick, Flowmaster, Smittybilt 8k Synthetic Line Winch.

My Jeep is Organic - Undercoated in 100% all natural Utah Dirt --- Utah Jeep Crew #49 ~Will
2012 JeepForum GCOTY --- [URL=http://www.jeepforum.com/forum/f197/project-yeti-abominable-wj-1125665/]Project Yeti Build Thread[/URL]
85IrocZ-28 is offline   Reply With Quote
Unread 02-15-2011, 10:18 PM   #850
SplitNail
Registered User
1999 WJ 
 
Join Date: Aug 2008
Location: Katy, TX
Posts: 4,015
Quote:
Originally Posted by 85IrocZ-28
Or one hour of your time. Pay yourself $75 an hour by doing the test yourself.
Okay, sounds good. I just dont have time. And these things don't take an hour.
__________________
1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids

SplitNail is offline   Reply With Quote
Unread 02-17-2011, 07:56 AM   #851
SplitNail
Registered User
1999 WJ 
 
Join Date: Aug 2008
Location: Katy, TX
Posts: 4,015
So... If my problems are in the heads what is the most cost efficient way of fixing it? Remanned heads, new heads, machine the heads? Any ideas?
__________________
1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids

SplitNail is offline   Reply With Quote
Unread 02-17-2011, 08:02 AM   #852
TOW_HOOK
Registered User
1957 CJ3B 
 
Join Date: Dec 2010
Location: western pa, PA
Posts: 316
Quote:
Originally Posted by SplitNail View Post
I have always heard use the champion copper cores...
i would stay away from those on a 4.7.
__________________
57 3b classic krawler /93 xj r.i.p. / 95 yj daily driver / 02 wj wife's ride / 98 xj wanta be rock krawler
TOW_HOOK is offline   Reply With Quote
Unread 02-17-2011, 08:05 AM   #853
SplitNail
Registered User
1999 WJ 
 
Join Date: Aug 2008
Location: Katy, TX
Posts: 4,015
Quote:
Originally Posted by TOW_HOOK

i would stay away from those on a 4.7.
That's odd. That's what it came with.
__________________
1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids

SplitNail is offline   Reply With Quote
Unread 02-17-2011, 08:09 AM   #854
TOW_HOOK
Registered User
1957 CJ3B 
 
Join Date: Dec 2010
Location: western pa, PA
Posts: 316
Quote:
Originally Posted by SplitNail View Post
I put a can of restore in it to see what happens. I wonder if this issue could be in the heads..
Do a leak down test, and listen to the valves, might need to remove the valve covers. the valves could need a valve job? have fun with that. it took me 3 months to do my wife's head gaskets... working full time and, have 3 others can be time consuming....
__________________
57 3b classic krawler /93 xj r.i.p. / 95 yj daily driver / 02 wj wife's ride / 98 xj wanta be rock krawler
TOW_HOOK is offline   Reply With Quote
Unread 02-17-2011, 08:09 AM   #855
sherker55
Registered User
2004 WJ 
 
Join Date: Jan 2009
Location: South Jersey
Posts: 834
Quote:
Originally Posted by TOW_HOOK View Post
i would stay away from those on a 4.7.


Quote:
Originally Posted by SplitNail View Post
That's odd. That's what it came with.
sherker55 is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.