Timing Chain
03-17-2019, 08:00 AM
#1
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Model: Cherokee (XJ)
Timing Chain
Here is a picture of it.
Can someone show me the timing marks for a 99 Cherokee 4.0. I got the 1 cylinder at TDC on compression stroke and both the cam and crank are opposite of each other. The crank is lining up as it should per images I have seen of what correct looks like. But the cam mark is 180 degrees from the crank mark. I am seeing that they should point at each other but my are not. If you had an imaginary line going through the assembly it would be in line. What is the deal with the 15 pin count? Help please.
Last edited by ssgcoleman1; 03-17-2019 at 08:05 AM. Reason: Photo added
03-17-2019, 08:16 AM
#2
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What exactly are you trying to do? If you want to change the timing chain and gears you rotate it to where the mark on the top gear is at the bottom and lined up with the mark on the bottom gear.
03-17-2019, 08:44 AM
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I am replacing the cam and cam bearings. It was eating the distributor gear. The only wear I see is on the gear on the cam shaft that turns the distributor. I am replacing all the cam components to fix this issue. So the cam in the picture is basically 180 out? It was definitely on TDC compression stroke. So the two marks should be pointed at each other?
03-19-2019, 06:49 PM
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Year: 1988
Model: Cherokee (XJ)
Engine: 4.0L Renix
I don't want to add bad information here so someone please correct me if needed. I recently did the timing gears on my 88 and they were facing each other. If someone had put the cam in 180 out at some point and ran the plug wires 180 out I *think* everything would still run, probably just not well. Just a thought, I've seen previous owners do some crazy stuff!
03-19-2019, 10:28 PM
#6
Junior Member
I.E. damaged / seizing distributor or oil pump bearing?
I once lost a new camshaft in a new Mopar rebuilt 4.0L due to a new jobber aftermarket distributor's bearing seizing up while running!
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