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CF Veteran
Joined: Mar 2009
Posts: 8,712
Likes: 2
From: Loomis,California
Year: 1987
Model: Cherokee
Engine: 242 inline six
when I did mine I put it nose down (pointed it down hill)filled the bottle.Turned the heater on hot started the jeep let it idle till it came up to temp watching the level in the bottle.Check to make sure the upper radiator hose gets hot.If it doesn't there is still a bubble,which causes the t-stat not to open.whats happening is the hot water is just going through the head not into the radiator,thats why its boiling over through the bottle.
CF Veteran
Joined: Aug 2008
Posts: 5,603
Likes: 0
From: Hollidaysburg, PA
Year: 1990
Model: Cherokee
Engine: 4.0 lt. 242 cu.in.
thnx, would you off hand know what the stock metal five stars for the cherokee are i have crappy aluminum ones and want something steel until i buy good ones. and can get the set for 50 bucks
CF Veteran
Joined: Aug 2008
Posts: 5,603
Likes: 0
From: Hollidaysburg, PA
Year: 1990
Model: Cherokee
Engine: 4.0 lt. 242 cu.in.
I'm pretty sure all stock cherokee wheels except maybe the upcountry package, have 5.25" B.S.
Junior Member
Joined: Apr 2009
Posts: 54
Likes: 0
From: Billings,Montana
Year: 1988
Model: Cherokee
Engine: 4.0L
when I did mine I put it nose down (pointed it down hill)filled the bottle.Turned the heater on hot started the jeep let it idle till it came up to temp watching the level in the bottle.Check to make sure the upper radiator hose gets hot.If it doesn't there is still a bubble,which causes the t-stat not to open.whats happening is the hot water is just going through the head not into the radiator,thats why its boiling over through the bottle.
CF Veteran
Joined: Aug 2008
Posts: 5,603
Likes: 0
From: Hollidaysburg, PA
Year: 1990
Model: Cherokee
Engine: 4.0 lt. 242 cu.in.
you need the heater control vavle open in order to in sure you have no air pockets in the heater core. If you dont open it and there is an air pocket the next time you open it it could just put that air in the engine.
Junior Member
Joined: Apr 2009
Posts: 54
Likes: 0
From: Billings,Montana
Year: 1988
Model: Cherokee
Engine: 4.0L
My problems are over I ordered the aluminum bottle from macs radiator and it works great, I ran my jeep drove to town and back with not a single problem. I'm so freaking happy
Advertised Duration (Int/Exh): 268/276
Duration @ .050 (Int/Exh): 226/234
Gross Valve Lift (Int/Exh): .527/.547
LSA/ICL: 110/106
Valve Lash (Int/Exh): Hyd/Hyd
RPM Range: 2000-6000
(2) Cylinder head and intake manifold ... porting + polishing + Competition valve jop.
(3) Ring and Pinion 4.56
(4) KandN + headers + exhaust system
(5) Two electric fan
.............. So, do you think that MSD will give my jeep a good push ?
Senior Member
Joined: Mar 2010
Posts: 658
Likes: 1
From: Everett, WA
Year: 1992
Model: Cherokee
Engine: 4.0
I need to do a valve cover gasket but i cant get myself to buy a $40 gasket.
Could i just use RTV instead or do i still need the grommets?
i searched around but nobody ever really gave a definite answer as to if i needed the grommets
Could i just use RTV instead or do i still need the grommets?
i searched around but nobody ever really gave a definite answer as to if i needed the grommets




