Pre-engine Swap Advice

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GreenMachine1

NAXJA Forum User

Location

CT

• Oct 21, 2010

• #1

Hey-

I just got a real good deal ($250) on a 1997 Cherokee 4.0, AW4, NP242, 150k with a cracked engine block. I have a complete 4.0 out of a 98 Cherokee in my garage with around 150k on it also. I have heard the spare motor idle for a brief second while the jeep was unloaded from a trailer but that's it. I want to swape this spare motor into the the 1997 Cherokee but I was wondering what maintenance everyone would do to the motor while it's already on the engine stand.

I was thinking intake/exhaust gaskets, valve cover gasket, head gasket, oil pan gasket, rear main seal, front main seal, water pump, obviously a tune up (plugs, wires, cap, rotor, yadda yadda).

What else would you recommend? Anything I'm forgetting??

Thanks for the help!

 

ParadiseXJ

NAXJA Forum User

Location

Paradise, CA 95969

• Oct 21, 2010

• #2

I'd replace the freeze plugs based on your location.

 

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GreenMachine1

NAXJA Forum User

Location

CT

• Oct 21, 2010

• #3

Good call. Thanks for the advice.

 

tbburg

NAXJA Forum User

Location

Scottsdale AZ

• Oct 21, 2010

• #4

New injector O-rings for which ever injector set you end up using.

New thermostat while you have it that far apart(get a Mopar or Stant, not a cheap one)

 

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cruiser54

NAXJA Forum User

Location

Prescott, Az

• Oct 21, 2010

• #5

Why a head gasket?

 

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mtparker97

NAXJA Forum User

Location

Hampton, VA

• Oct 21, 2010

• #6

while its out and your doing the rear main seal. take a look at the oil pump pick up. granted mine has over 200k there was probably only 10% of the screen visable.

 

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GreenMachine1

NAXJA Forum User

Location

CT

• Oct 22, 2010

• #7

Never thought about injector o-rings...good idea. Already boiled the relatively new Mopar thermostat to make sure it opens/closes properly. I supposed I could replace it for added insurance.

Why not change the head gasket?? Parts are cheap and my labor is free. Motor is on a stand. I'd be annoyed if I got everything buttoned up to find a leaky head gasket a week later.

 

joe_peters

NAXJA Forum User

Location

Grants Pass, OryGun

• Oct 22, 2010

• #8

mtparker97 said:

while its out and your doing the rear main seal. take a look at the oil pump pick up. granted mine has over 200k there was probably only 10% of the screen visable.

Click to expand...

Might consider a new high-volume pump, cheap upgrade while you have it apart.

 

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GreenMachine1

NAXJA Forum User

Location

CT

• Oct 23, 2010

• #9

I will put in a high volume pump as cheap insurance while it's apart. Where should I source the pump? For that matter, where should I source all the gaskets? Thanks.

 

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cruiser54

NAXJA Forum User

Location

Prescott, Az

• Oct 23, 2010

• #10

Napa has a great deal on the HV oil pump. About $85 and comes with a new pick-up tube. You will have to massage your oil pan a bit.

 

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mtparker97

NAXJA Forum User

Location

Hampton, VA

• Oct 23, 2010

• #11

GreenMachine1 said:

I will put in a high volume pump as cheap insurance while it's apart. Where should I source the pump? For that matter, where should I source all the gaskets? Thanks.

Click to expand...

when i got my HV pump it was from auto zone and was actually 10$ cheaper than the stock PSI pump. wierd i know so i went with the HV pump and love it.

 

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cruiser54

NAXJA Forum User

Location

Prescott, Az

• Oct 23, 2010

• #12

At Napa, a stock pump was $82. The HV pump was $83 and came with a pickup tube/screen included-a $35 value. No brainer.

 

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GreenMachine1

NAXJA Forum User

Location

CT

• Oct 23, 2010

• #13

Definitely a no brainer. I will be upgrading the pump.

The more and more I think about this motor, the more I get tempted to build a stroker, although I'm a broke grad student who really can't afford it. Does anyone know of any good machine shops in CT?? I might as well start pricing out some machine work to see if I can swing a stroker build.