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Jeep GC - 5 Year Maintenance

Old 01-11-2015, 10:42 AM
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Default Jeep GC - 5 Year Maintenance

My sister's 2009 Grand Cherokee V8 (4.7L) is due for its 5 year and 30,000 mile major maintenance.
The manual states that the front and rear differential fluids, transfer case fluid, transmission filters & fluid, brake fluid, engine coolant and intake side spark plugs are to be changed.
She plans to give the vehicle to her son in 16 months, when he gets his license, so she expects to keep the car for another 4-5 years.
The dealer has recommended she also change the serpentine belt, belt tensioner, upper & lower radiator hoses, heater hoses and thermostat while doing the coolant service.
Are belts and hoses part of routine maintenance if you plan to keep a car for as long as she likely will?
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Old 01-11-2015, 10:49 AM
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I would do the fluids and that's it.
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Old 01-11-2015, 10:56 AM
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I prefer to replace wear items like hoses and belts before they break as they seem to break at the most inconvenient time. Changing a serpentine belt on the side of the highway doesn't sound like fun to me.
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Old 01-11-2015, 11:03 AM
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Im a chrysler tech and I never recommend replacing hoses unless they are leaking or high mileage and im already replacing other engine cooling components. OEM belts and hoses these days last a very long time, very long. Longer than aftermarket companies as well. I have cars and trucks come in with 150k+ and the belts still looked fine. If you want to be on the safe side then get it all replaced is fine. But an 2009 and 30k miles on it? She needs to drive that thing!
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Old 01-11-2015, 05:37 PM
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First, if giving to her son, the expectation of the vehicle NOT getting in a severe accident within the next year is small.
Second, replace what the manual says to replace - that's it. Anything else is just padding the dealer's pockets.
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Old 01-11-2015, 06:02 PM
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Originally Posted by Mars5L View Post
Im a chrysler tech and I never recommend replacing hoses unless they are leaking or high mileage and im already replacing other engine cooling components. OEM belts and hoses these days last a very long time, very long. Longer than aftermarket companies as well. I have cars and trucks come in with 150k+ and the belts still looked fine. If you want to be on the safe side then get it all replaced is fine. But an 2009 and 30k miles on it? She needs to drive that thing!
It's worth knowing that the folks who make automotive cooling systems hoses had a research breakthrough several years ago. They found hoses that typically lasted only 3-4 years were failing due to electrolytic corrosion and that a different rubber formulation stopped that corrosion. Since then, OEM hoses and quality aftermarket hoses last almost indefinitely. We changed the original hoses on our Camry at 140 Kmiles when we had to replace the radiator, but the old hoses seemed in near-perfect shape.
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Old 01-11-2015, 06:37 PM
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There is a chance the dealer saw something on the belt (or hoses) that indicated it should be changed....and once they are in that far, the labor for the hoses (or belt) may not be that much, and it sure isn't much in parts.

But there is always the risk they are just trying to pad the bill. Perhaps they should just ask why.

There is also the chance she said something like "I'm going to give this Jeep to my baby boy and I want to make sure nothing could leave him stranded anywhere after dark" to the service writer, so he's just doing what she asked.
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Old 01-11-2015, 07:40 PM
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Serpentine belt and tensioner are inexpensive and normally easy to replace.

Cheap insurance imo.
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Old 01-11-2015, 08:43 PM
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belts are normally changed at ~60k miles.

I just did my jeep again at 130 ish. (and last time 65ish) left the old one in the car as a spare. still looked ok. still have factory hoses, thermostat, and waterpump. though they should probably be done soon.


I don't understand the changing half the spark plugs... do them all if needed.
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Old 01-11-2015, 08:46 PM
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Originally Posted by smac999 View Post
belts are normally changed at ~60k miles.

I just did mine again at 130 ish. (and last time 65ish) left the old one in the car as a spare. still looked ok. still have factory hoses. though they should probably be done soon.


I don't understand the changing half the spark plugs... do them all if needed.
His gen 4.7 is dual spark plugs. The intake side is regular nickel plugs, they are due every 30k. The exhaust side are a pain in the ass to change, are due 100k, are irdium I believe which makes it a really expensive tune up
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Old 01-12-2015, 04:59 AM
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Originally Posted by flyau98 View Post
There is a chance the dealer saw something on the belt (or hoses) that indicated it should be changed....and once they are in that far, the labor for the hoses (or belt) may not be that much, and it sure isn't much in parts.
That does happen. We bought a new Honda Accord 4-cyl a few years ago. I opened the hood, saw the upper radiator hose had been partially cut through, probably a box cutter accident. I wanted the hose replaced, obviously. Our dealership, the only Honda dealership within 50 miles, did not stock radiator hoses, so they had to take one off an unsold car on the lot. Dealerships stock parts that are needed frequently, so that told me they rarely need to replace a radiator hose.
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Old 01-12-2015, 06:13 AM
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With only 30k miles, just do the fluids. With almost every profession today looking to make as much $$$ as they possibly can from each and every transaction, my montra is don't fix it unless its broken!
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Old 01-12-2015, 05:05 PM
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Originally Posted by flyau98 View Post
There is a chance the dealer saw something on the belt (or hoses) that indicated it should be changed...
Dealer hasn't seen car yet - just a quote over the phone.
I am inclined to tell her to just do the fluids and spark plugs.
Priced out the parts online at two Mopar dealers and the total comes to about $650. The dealer, with the parts quoted $1,750, so about $1,100 in labor - 9 hours seems like a lot of time to do the fluids, hoses and spark plugs.
We have a local shop that is very good - I am thinking that buying the parts from Mopar and having the local shop do the work would lower the cost by about $500.
Unless I am missing something, I don't see the fluid changes and plugs being beyond the capability of a local repair shop?
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Old 01-12-2015, 05:43 PM
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If they are doing all that for 9 hours in labor thats a pretty good deal or at least right about what it should be I think just thinking about it quickly. That is a bit of work changing the trans filter depending which trans you have.
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Old 01-12-2015, 06:16 PM
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Rear diff, transfer, brake and radiator fluid. The rest is fine. If you want to get excessive you can change the plugs too but everything else is more than wasteful.
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Old 01-13-2015, 05:07 AM
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Originally Posted by round2it View Post
Serpentine belt and tensioner are inexpensive and normally easy to replace.

Cheap insurance imo.
Depends upon one's definition of inexpensive.
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Old 01-13-2015, 11:32 AM
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Most dealer ships maintenance departments, always try to up sell ever thing. Yes there are items like fluids that might have to be replaced but many items do not.
Story, my wife took a ride in a flat bed tow truck to get the battery replaced in our 2012 CRV, still under warranty with less than 15k on it. They replaced the battery no problem, but sold her air filters for the engine and cabin to the tune of $98 WOW what a profit. Now,I did have words with the agency, since they took advantage of my wife's lack of automobile knowledge.
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