Engine Miss Fixed - 4.0 Head on 4.2 Block - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 03-25-2002, 06:06 PM
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Engine Miss Fixed - 4.0 Head on 4.2 Block

As a refresher...I bought an 89 Cherokee for $300 that had a blown engine. I had the head rebuilt and I put it on top of an 88 Wrangler 4.2 block I had with only 5K miles on it. Overall, everything worked except for the engine cutting out in a narrow RPM/throttle range. I tried everything. I finally gave in and took it to the jeep dealer.

The timing was off. The mechanic had to renotch the dist to get it properly timed for TDC on piston #1. It appears that there is just enough difference in the blocks to throw it off. He also had to replace a component in the dist. I plan to go by and talk to him and see how he was able to measure the timing. There are no timing marks that I know of.

Anyway, she now runs fine. This week I pick up my 4" lift and related goodies. Time to get this baby ready for the trails.
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post #2 of (permalink) Old 03-25-2002, 06:48 PM
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Re: Engine Miss Fixed - 4.0 Head on 4.2 Block

awesome. sounds like you picked up a hell of a deal.
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post #3 of (permalink) Old 03-25-2002, 11:43 PM
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Re: Engine Miss Fixed - 4.0 Head on 4.2 Block

He/ She may have dead-timed your engine. I'm not sure about re-notching of the distributor. Its usually a last-ditch effort, or done at time of rebuild. Very time consuming if not done during rebuild.
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post #4 of (permalink) Old 03-26-2002, 12:03 AM
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Re: Engine Miss Fixed - 4.0 Head on 4.2 Block

What was the final cost for the dealer repairs, if you don't mind sharing this info?
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post #5 of (permalink) Old 03-26-2002, 05:35 PM
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Re: Engine Miss Fixed - 4.0 Head on 4.2 Block

Cost $226, including new cap, rotor and some part in the dist. I'm stoping by there this evening to talk to the guy and see what he did exactly.
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