swap 4.7l for 4.7

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Oct 23, 2022 | 11:52 AM

Paulieb1953

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Newbie

Joined: Jul 2020

Posts: 4

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Model: Cherokee (XJ)

swap 4.7l for 4.7

i have a 99gc limited that has a blown 4.7L in it,i was able to get a4.7 any advice on whether it will bolt in?

Oct 23, 2022 | 12:08 PM

Rogue4x4

::CF Administrator::

Joined: Feb 2011

Posts: 14,479

Likes: 805

From: Blunt, South Dakota

Year: 97

Model: Cherokee (XJ)

Engine: 4.6 stroker

wat

Oct 23, 2022 | 01:58 PM

Paulieb1953

Thread Starter

Newbie

Joined: Jul 2020

Posts: 4

Likes: 0

Model: Cherokee (XJ)

not quite sure what wat means completely new at this stuff any help would be greatly apprecated

Oct 26, 2022 | 12:34 AM

Jim Malcolm

Senior Member

Joined: Oct 2020

Posts: 934

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From: PA

Year: 1994

Model: Cherokee (XJ)

Engine: 4.0

wat is short for what...

As far as I'm aware, there are two different 4.7s out there, differing only by the number of teeth on the reluctor wheel that the crankshaft position sensor uses. You can swap reluctor wheels, but it requires removal of the crankshaft, so it's much easier to get one with the proper reluctor on it already. The earlier models were only used for a few years before they increased the number of teeth on the reluctor. I believe one for a 99 GC will be the earlier vintage of 4.7L, but it's been a few years now since I needed this info. Whatever you do, completely rebuild the timing belt tensioner system, at minimum, if you swap in a used motor; it's the problem child on these motors...