2013 3.6 Grand Cherokee long block purchased-what else to replace while engine out?

432 Views 6 Replies 3 Participants Last post by ImperialCrown, 2 mo ago

birmingplumb

Discussion Starter · 2 mo ago

Read horror storie on how hard to change oil cooler plastic flawed design where filter screws into-cracks part---top oil pan gasket requires 1000 in labor to remove parts to get to etc.. Mechanic has motor arrived today yet to open look claims he will let me know tomorrow what I need ---concern is he is not as good as all of us here so I found issues in 1 hr search and decided to start new thread--I plan on changing
1. plugs
2. pcv valve
3. belt tensioner and pully and belts
4 radiator hoses and heater hoses
5. oil cooler if plastic?
6. Oil pan top ?
7. Oil pan bottom ? and gaskets
8 all injectors
9 coils?
10 valve covers and gaskets cause mechanic said plastic he just changed one
What did I miss or do too much of in my guess?
no diagram from mopar of what is included with new l$5800 long block so lost on what to all do -thanks all I build these and dreamed about buying one for 12 years finally got a 2013 and now find the motor /head issue causing this expense---please help---and all mopar parts or ac/delco injectors for half price or?

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World14

· #2 · 2 mo ago

If you're going to do all of #3 & #4, do you plan on doing the thermostat too?
While Mopar is always recommended, if you feel more comfortable choosing another brand (Such as AC/Delco as you mentioned), that's your prerogative. I'd rather go Mopar if I could afford it.
Also, unless you or your mechanic deems the upper oil pan as needing replacement, I don't really get the idea to replace it? The lower is steel and it easily rusts, the upper is aluminum and if the mating surface can't be cleaned off well enough to reseal, or it somehow became warped, I (personally, others may find or offer a better reason) don't see a need to replace it.
If you're replacing the oil filter adapter because it's plastic, does that mean you're going to a metal housing from Dorman or an alternate company, or do you not trust the one on either motor and just want a fresh one?

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ImperialCrown

· #3 · 2 mo ago

Spark plugs may be Iridiums. They should be good for 100K miles (160K km).
Fuel Injectors don't have a service interval. Normally they last the life of the vehicle.
If the Oil Filter Adapter/cooler isn't leaking. I would leave it. See if it's wet.
Use OAT coolant meeting Chrysler MS-12106 when you change the coolant. Mix 50/50 with distilled water.
With an unknown past maintenance history, you may want to change ATF & filter, t/case fluid, frt & rear diff fluids and cabin air filter.
Look for a used one of these?:

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birmingplumb

Discussion Starter · #4 · 2 mo ago

World14 said:
If you're going to do all of #3 & #4, do you plan on doing the thermostat too?
While Mopar is always recommended, if you feel more comfortable choosing another brand (Such as AC/Delco as you mentioned), that's your prerogative. I'd rather go Mopar if I could afford it.
Also, unless you or your mechanic deems the upper oil pan as needing replacement, I don't really get the idea to replace it? The lower is steel and it easily rusts, the upper is aluminum and if the mating surface can't be cleaned off well enough to reseal, or it somehow became warped, I (personally, others may find or offer a better reason) don't see a need to replace it.
If you're replacing the oil filter adapter because it's plastic, does that mean you're going to a metal housing from Dorman or an alternate company, or do you not trust the one on either motor and just want a fresh one?

Thanks for the thermostat idea- metal aluminum- but may reuse if not wet---as far as this cast upper pan--we need to take off the old motor and buy a gasket and I will replace lower pan gasket---will go mopar parts then--

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birmingplumb

Discussion Starter · #5 · 2 mo ago

ImperialCrown said:
Spark plugs may be Iridiums. They should be good for 100K miles (160K km).
Fuel Injectors don't have a service interval. Normally they last the life of the vehicle.
If the Oil Filter Adapter/cooler isn't leaking. I would leave it. See if it's wet.
Use OAT coolant meeting Chrysler MS-12106 when you change the coolant. Mix 50/50 with distilled water.
With an unknown past maintenance history, you may want to change ATF & filter, t/case fluid, frt & rear diff fluids and cabin air filter.
Look for a used one of these?:
View attachment 93885

thanks this is what i found ---says full service manual is this the same as u redommend or u got a link? Jeep Grand Cherokee WK2 Service Repair Manual [CD-ROM] (fits year: 2011, 2012, 2013, 2014, 2015, 2016): Jeep: 9772538811007: Amazon.com: Books
or
2013 Jeep Grand Cherokee Service Repair Manual CD Laredo Limited Overland SRT8 | eBay

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Reactions: 1

birmingplumb

Discussion Starter · #6 · 2 mo ago

World14 said:
If you're going to do all of #3 & #4, do you plan on doing the thermostat too?
While Mopar is always recommended, if you feel more comfortable choosing another brand (Such as AC/Delco as you mentioned), that's your prerogative. I'd rather go Mopar if I could afford it.
Also, unless you or your mechanic deems the upper oil pan as needing replacement, I don't really get the idea to replace it? The lower is steel and it easily rusts, the upper is aluminum and if the mating surface can't be cleaned off well enough to reseal, or it somehow became warped, I (personally, others may find or offer a better reason) don't see a need to replace it.
If you're replacing the oil filter adapter because it's plastic, does that mean you're going to a metal housing from Dorman or an alternate company, or do you not trust the one on either motor and just want a fresh one?

update- mechanic opened box---no gasket set--need part number for long block set---claims new oil cooler installed---claims new oil pump--so oil pump is huge relief if it holds--

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ImperialCrown

· #7 · 2 mo ago

Mopar 68294134AC:

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