prime oil pump
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Member
Joined: Aug 2011
Posts: 113
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From: South Florida
Year: 1998
Model: Cherokee
Engine: 4.0
I hear theirs two ways to prime the oil pump the first being pulling the distributor and using a drill and the second is pulling all the spark plugs out and cranking it. I decided Im gonna do it the second way because I dont really wanna mess with the timing. I didnt really see too much on the second way of doing it though, to my understanding I pull out the plugs disconnect power to my injectors and crank it. I hear its bad on the starter but it has a liftime warranty anyways lol. My question is how do I know when its primed? Does oil come out of the plug holes or something?
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Joined: May 2008
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From: +34° 25' 35.67", -81° 21' 12.04"
Year: 1993
Engine: 4.0
I hear theirs two ways to prime the oil pump the first being pulling the distributor and using a drill and the second is pulling all the spark plugs out and cranking it. I decided Im gonna do it the second way because I dont really wanna mess with the timing. I didnt really see too much on the second way of doing it though, to my understanding I pull out the plugs disconnect power to my injectors and crank it. I hear its bad on the starter but it has a liftime warranty anyways lol. My question is how do I know when its primed? Does oil come out of the plug holes or something?
Why are you priming the oil pump? Did you rebuild the engine? Replace the oil pump?
No need to pull all the plugs. Pull the coil wire off of your distributor and spin it over for a while. Put the wire back on and fire it up.
If oil comes out of your spark plug holes then you have serious issues.
CF Veteran
Joined: Mar 2010
Posts: 47,923
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From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Out of the plug holes?! I sure as hell hope not.
Why are you priming the oil pump? Did you rebuild the engine? Replace the oil pump?
No need to pull all the plugs. Pull the coil wire off of your distributor and spin it over for a while. Put the wire back on and fire it up.
If oil comes out of your spark plug holes then you have serious issues.
Why are you priming the oil pump? Did you rebuild the engine? Replace the oil pump?
No need to pull all the plugs. Pull the coil wire off of your distributor and spin it over for a while. Put the wire back on and fire it up.
If oil comes out of your spark plug holes then you have serious issues.
CF Veteran
Joined: Feb 2010
Posts: 12,367
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From: Oroville, CA
Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
Don't just pull the secondary coil lead, you could damage the coil or PCM. Unplug the primary coil lead or the crank sensor, or pull the fuel pump relay.
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From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Thread Starter
Member
Joined: Aug 2011
Posts: 113
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From: South Florida
Year: 1998
Model: Cherokee
Engine: 4.0
I put a new oil pump in.Lol i must have read it wrong or something I think what i read about oil coming outta the hole was where the filter goes lol. Any indication to know when its primed or it just will be after cranking it for a little?
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From: washington
Year: 1987
Model: Cherokee
Engine: 4.0 6cyl
I've replaced my oil pump. All I did was pull the fuel pump relay and turned the engine over in 10-15 second intervals a few times. Put the fuel pump relay back in. Primed the fuel pump (key on engine off) a couple times. Then fired her up.
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Member
Joined: Aug 2011
Posts: 113
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From: South Florida
Year: 1998
Model: Cherokee
Engine: 4.0
Lucky me with the dummy lights rather than the gauges lol. So I guess ill just do it a bunch of times to be safe lol thanks for all the helpful advise everybody.
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From: Prescott, Az
Year: 1990
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Engine: 4.0
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