Northern Utah BS thread #2
CF Veteran
Joined: Sep 2011
Posts: 1,354
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From: vernal, utah
Year: 1995
Model: Cherokee
Engine: 4.0
i knew my cummins sucked, i just didnt know how much lol
Thread Starter
CF Veteran
Joined: Nov 2011
Posts: 1,179
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From: Lehi, Utah
Year: 90' 93'
Model: Cherokee
Engine: 4.0
Sucked gas? Lol
The dowel pin has been (starting with production in 1983), and continues to be, used on the Cummins B-series engine as a locating and alignment point for the attachment of the front gear cover to the engine block. The problem that has been encountered by owners is predominately with the ’94 to ’98 12-valve engines. The dowel pin is not a problem on 24-valve engines, as the timing cover was changed to fit the 24-valve’s VP44 fuel pump.* These 12-valve engines have the heavier Bosch P7100 fuel pump which was required for higher horsepower ratings and for the higher injection pressures needed to meet stricter emission legislation enacted 1/1/1994.
The belief is that the vibrations and weight of the P7100 fuel pump may cause the dowel pin to loosen in its bore and fall out. If the dowel pin does fall, it can be caught in the fuel pump gear causing a major problem (cracked cam nose): or it can fall between the cam gear and the front housing and, in its path to the bottom of the oil pan, crack the gear case housing. I’ve heard many a story of how the cracked housing has been fixed using J-B Weld epoxy. Alternately, the gear housing can be removed and replaced, but this is a big task, as the engine’s camshaft has to be removed to remove/replace the housing. A final fall-out scenario, the pin falls to the bottom of the oil pan and resides in the bottom of the pan forever (or at least until the pan is removed)
Just the fear of this is why I would prefer the 24 valve.
The dowel pin has been (starting with production in 1983), and continues to be, used on the Cummins B-series engine as a locating and alignment point for the attachment of the front gear cover to the engine block. The problem that has been encountered by owners is predominately with the ’94 to ’98 12-valve engines. The dowel pin is not a problem on 24-valve engines, as the timing cover was changed to fit the 24-valve’s VP44 fuel pump.* These 12-valve engines have the heavier Bosch P7100 fuel pump which was required for higher horsepower ratings and for the higher injection pressures needed to meet stricter emission legislation enacted 1/1/1994.
The belief is that the vibrations and weight of the P7100 fuel pump may cause the dowel pin to loosen in its bore and fall out. If the dowel pin does fall, it can be caught in the fuel pump gear causing a major problem (cracked cam nose): or it can fall between the cam gear and the front housing and, in its path to the bottom of the oil pan, crack the gear case housing. I’ve heard many a story of how the cracked housing has been fixed using J-B Weld epoxy. Alternately, the gear housing can be removed and replaced, but this is a big task, as the engine’s camshaft has to be removed to remove/replace the housing. A final fall-out scenario, the pin falls to the bottom of the oil pan and resides in the bottom of the pan forever (or at least until the pan is removed)
Just the fear of this is why I would prefer the 24 valve.
Last edited by Mr Talon; Sep 25, 2012 at 10:43 PM.
CF Veteran
Joined: Sep 2010
Posts: 1,930
Likes: 0
From: herriman
Year: 1991
Model: Cherokee
Engine: 4.0
Originally Posted by builtnotbought89'
Anyone have or know of a 91-99 4.0 head or full motor for sell? Donkeypunch is finally done putting money into his 0331 head
CF Veteran
Joined: Sep 2010
Posts: 1,930
Likes: 0
From: herriman
Year: 1991
Model: Cherokee
Engine: 4.0
Originally Posted by Mr Talon
Sucked gas? Lol
The dowel pin has been (starting with production in 1983), and continues to be, used on the Cummins B-series engine as a locating and alignment point for the attachment of the front gear cover to the engine block. The problem that has been encountered by owners is predominately with the ’94 to ’98 12-valve engines. The dowel pin is not a problem on 24-valve engines, as the timing cover was changed to fit the 24-valve’s VP44 fuel pump.* These 12-valve engines have the heavier Bosch P7100 fuel pump which was required for higher horsepower ratings and for the higher injection pressures needed to meet stricter emission legislation enacted 1/1/1994.
The belief is that the vibrations and weight of the P7100 fuel pump may cause the dowel pin to loosen in its bore and fall out. If the dowel pin does fall, it can be caught in the fuel pump gear causing a major problem (cracked cam nose): or it can fall between the cam gear and the front housing and, in its path to the bottom of the oil pan, crack the gear case housing. I’ve heard many a story of how the cracked housing has been fixed using J-B Weld epoxy. Alternately, the gear housing can be removed and replaced, but this is a big task, as the engine’s camshaft has to be removed to remove/replace the housing. A final fall-out scenario, the pin falls to the bottom of the oil pan and resides in the bottom of the pan forever (or at least until the pan is removed)
Just the fear of this is why I would prefer the 24 valve.
The dowel pin has been (starting with production in 1983), and continues to be, used on the Cummins B-series engine as a locating and alignment point for the attachment of the front gear cover to the engine block. The problem that has been encountered by owners is predominately with the ’94 to ’98 12-valve engines. The dowel pin is not a problem on 24-valve engines, as the timing cover was changed to fit the 24-valve’s VP44 fuel pump.* These 12-valve engines have the heavier Bosch P7100 fuel pump which was required for higher horsepower ratings and for the higher injection pressures needed to meet stricter emission legislation enacted 1/1/1994.
The belief is that the vibrations and weight of the P7100 fuel pump may cause the dowel pin to loosen in its bore and fall out. If the dowel pin does fall, it can be caught in the fuel pump gear causing a major problem (cracked cam nose): or it can fall between the cam gear and the front housing and, in its path to the bottom of the oil pan, crack the gear case housing. I’ve heard many a story of how the cracked housing has been fixed using J-B Weld epoxy. Alternately, the gear housing can be removed and replaced, but this is a big task, as the engine’s camshaft has to be removed to remove/replace the housing. A final fall-out scenario, the pin falls to the bottom of the oil pan and resides in the bottom of the pan forever (or at least until the pan is removed)
Just the fear of this is why I would prefer the 24 valve.
CF Veteran
Joined: Sep 2011
Posts: 1,354
Likes: 0
From: vernal, utah
Year: 1995
Model: Cherokee
Engine: 4.0
so i stole my jeep from the shop tonight, i didn't pay for them to put my exhaust on since they did such a crappy job lol
CF Veteran
Joined: Sep 2011
Posts: 1,354
Likes: 0
From: vernal, utah
Year: 1995
Model: Cherokee
Engine: 4.0
CF Veteran
Joined: Sep 2010
Posts: 1,649
Likes: 1
From: Springville, UT
Year: 1993
Model: Grand Cherokee
Engine: 5.2 V8, Dual cold air, dual batts, E-fan, Sanden OBA
Originally Posted by Mr Talon
There is a small pin in the front case, and if it rattles or falls out, boom.
Just for fun from Google.
2011
Chevy
397 hp @ 3,000 RPM
Torque: 765 lb-ft @ 1,600 RPM
Ford
400hp @ 2,800 RPM
800 torque@ 1,600 RPM
Cummins
350 HP @ 3,013 RPM
800 lb-ft @ 1,600 RPM
Just for fun from Google.
2011
Chevy
397 hp @ 3,000 RPM
Torque: 765 lb-ft @ 1,600 RPM
Ford
400hp @ 2,800 RPM
800 torque@ 1,600 RPM
Cummins
350 HP @ 3,013 RPM
800 lb-ft @ 1,600 RPM
CF Veteran
Joined: Sep 2010
Posts: 1,930
Likes: 0
From: herriman
Year: 1991
Model: Cherokee
Engine: 4.0
Originally Posted by customzj73
Okay I have heard good things about the new powerstroke but that's the only one I haven't actually driven. Out of all the older powerstrokes and Cummins the duramax kicks ***. I would much rather have the Cummins motor because I have personally seen the longevity difference between strait motors and V motors in multi-million dollar equipment that I service daily. I'm just not a huge fan of the truck itself, **** tranny, constant front end problems, rough ride, and outdated interiors on many models. If I had a choice I would want a 12 valve with an Allison mated behind it stuffed into a 4th gen Cummins. But like you said to each his own
Thread Starter
CF Veteran
Joined: Nov 2011
Posts: 1,179
Likes: 0
From: Lehi, Utah
Year: 90' 93'
Model: Cherokee
Engine: 4.0
Next year or the next, cummins will have urea also. All depends on how one takes care of there vehicle. Besides recall items. I can't afford a new truck. Once the wifes evo is paid off, she said I could buy a cummins. So I'm happy.
CF Veteran
Joined: Sep 2010
Posts: 1,930
Likes: 0
From: herriman
Year: 1991
Model: Cherokee
Engine: 4.0
Originally Posted by Mr Talon
Next year or the next, cummins will have urea also. All depends on how one takes care of there vehicle. Besides recall items. I can't afford a new truck. Once the wifes evo is paid off, she said I could buy a cummins. So I'm happy.




