Timing Chain issue
#1
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Timing Chain issue
Here is a question for the 4.0 buffs, If a cam is off 180 degrees will that make the motor run hot? It was hard starting before, had to grind awhile before it fired up. Now should I reset the cam and dist before I put the new chain and gears on? Looks like the PO put it together 180 off timing. It ran OK other the running hot and hard starting.
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Here is a question for the 4.0 buffs, If a cam is off 180 degrees will that make the motor run hot? It was hard starting before, had to grind awhile before it fired up. Now should I reset the cam and dist before I put the new chain and gears on? Looks like the PO put it together 180 off timing. It ran OK other the running hot and hard starting.
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Timing marks point at each other on chain when installing ,dist points to no 1 tdc compression stroke dont no where cam pin comes into play or what book you loking at
#6
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Chilton! When I opened the engine up and tred to line up the marks they where way off. Crank mark was where it was supposed to be but the cam was 180 degrees off (11 o-clock pos).
Last edited by HappyPappy; 01-11-2013 at 07:21 PM.
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#8
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Year: 1995
Model: Cherokee
Engine: 4.0 I6
This is from a 95 xj factory service manual. It says to turn the crankshaft until the sprocket timing mark is at the position in the pic. And there should be 15 pins in the chain between the two timing marks.
#9
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Right, mine says the same thing, but is there a missprint somewhere in the system. Without the gears being on, the cam sproket guide pin is shown at 2 o-clock, mine is at 8 o-clock, that is where the question comes in. I'll have to check it closer tomorrow, past my bedtime. Thanks for your feed back.
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Right, mine says the same thing, but is there a missprint somewhere in the system. Without the gears being on, the cam sproket guide pin is shown at 2 o-clock, mine is at 8 o-clock, that is where the question comes in. I'll have to check it closer tomorrow, past my bedtime. Thanks for your feed back.
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Year: 1995
Model: Cherokee
Engine: 4.0 I6
Right, mine says the same thing, but is there a missprint somewhere in the system. Without the gears being on, the cam sproket guide pin is shown at 2 o-clock, mine is at 8 o-clock, that is where the question comes in. I'll have to check it closer tomorrow, past my bedtime. Thanks for your feed back.
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Year: 1999
Model: Grand Cherokee
Engine: 4.0
are you sure it was on the compression stroke when you first
opened it up?
You know the crank makes two revolutions to the cams one.
Where was the rotor button pointing?
opened it up?
You know the crank makes two revolutions to the cams one.
Where was the rotor button pointing?
Last edited by PatriotGT; 01-11-2013 at 08:46 PM.
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Year: 1995
Model: Cherokee
Engine: 4.0 I6