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Need rebuilt 3.6 --in Motown 2013 grand cherokee installed

1285 Views 23 Replies 6 Participants Last post by  birmingplumb
Found guy facebook in Montrose Mi-claims he runs shop - 3 yr warranty-5 grand installed. Should I just use a dealer or does anyone know of a trust worthy mechanic who will doo this rebuild of this motor?
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May I ask why you need a new (rebuilt) engine??? The 3.6L is a very sturdy and reliable engine, I've watched a 3 hour teardown video of the inner workings and would have thought the engine to be almost indestructible....what's going on with it???
May I ask why you need a new (rebuilt) engine??? The 3.6L is a very sturdy and reliable engine, I've watched a 3 hour teardown video of the inner workings and would have thought the engine to be almost indestructible....what's going on with it???
I bought it used 157k miles. The owner had lifetime bumper to bumper warranty. I looked thru all paperwork he had a excessive oil consumption way back and it was determined no excessive oil was being used say 30,000 miles i think. I drove it and noticed oil low so added 2 quarts. a week later after 2 fill ups i was 2 quarts low. No leaks -so I drove for approx 2 months with a misfire cyl 4 light code. Finally this happened and i am copying post from jeep forum "
Jeep dash light went from constant on to blinking on freeway last night- throttle response was terrible-no power- smell in car-screw it - i rolled window down smell worse (on freeway at 50mph) I thought carbon again (read below older copied post on what happened at 170k) so I blew it out 2 times by flooring it and on 3rd time light on dash went back solid ( misfire #4 was old issue) ..It still smelled so i blew it out and power came back , missing dissapeared-so i blew it out (5-6000 rmp passing gear) 5 more times. It was fine and smell went away. This morning it ran fine. Carbon ( I drive non-aggressive with egg on throttle they say----I am lost on what would cause the carbon because the mechanic claimed all compression is 130 each cyl. I am thinking computer---muffler restriction--pcv maybe (from reading oil consumption issue on pcv-)--help needed. old post below:
"......... After 4 months , with the light on misfire 4- and much research here- the (bought 4 mo ago had lifetime warranty still) Jeep ( 157k) started missing badly- Mechanic changed all plugs and boots and did a compression test - said 130 -135 on all 6 including #4-----put new coil on 4 as well--decided not to change injector now- "lets see what tune up does"--He said there was no sign the 134k tune up done by past owner (170k now) no sign from plugs that they skipped left side like I suspected--although there was extreme carbon on #4 plug as well as carbon on top of #4 piston. He said put in a couple cans of engine restore and some fuel cleaner . The light came on but went off, then came on went off and is now on. Son said white smoke from exhaust when following. No foreign substance in anti freeze or cap residu. Mechanic claimed valve seat-worn valve. Mechanic at Jeep plant thinks there is rubber guides on valves stems that go bad (concerning the excessive oil consumption)( "but we never tear them apart just replace") Mechanic not able change the head ( time involved) which part seems to be under $300 on mopars site but not sure. New JL being 50k - I love the ride in this thing-hate throttle response- looked up trade in @$6k so decided to drive it-screw the oil and smell-at least the heater and air work. Motown- -What should I do drive then get the reman motor with new heads on it? ...."
oil consumption tolerable--1 qt fill up---but carbon build up ? I can't put a 14 or 15 used motor in due to electronic trans in those--i dont want to convert to a hemi? I like the jeep-no rust all good-want to keep again rebuilt motor with newer heads? If so where in Detroit????I got the 6k if thats all it cost installed but who-where???? or ?? Should I do more engine restore additive?-should I blow it out every drive? Motown "
Now couple months later oil usage worse-- 2 days ago noticed whiteish smoke from exhaust... last week noticed smell odor when windo down like oil burning...exhaust tail pipe black....3 quarts low after 2 tanks gas approx 1000 miles....decided to keep it so far my plan...I have a rebuilder who wants 5k to rebuild my engine ....new heads etc he says. But the kicker is michigan motor exchange says they been doing this for 75 years and he cannot rebuild pentstar...says no parts avail and wonders where the rebuilder I found on fb for 5k will get anything besides gaskets...i call the rebuilder back...oh I can get after market parts and am putting new heads on it....I call the michigan motor rebuilder back and tell him his reply and he says no way----I am offered a junk yard motor from michigan motor exch only. I ask him I found a 2013 pentestar with 50k at schramms auto parts for 3600 ...how much to install---he says 2k. I find another junkyard with a 130k motor who does install and with warranty is 6300 parts labor 1 year...the facebook guy says 3 year warranty for 5k installed....The chrysler dealer said bring it in next thursday for 2 days for diagnositic...he says rebuilding is 11k and minus 1800 on parts for employee....my partner says stick the dealer with it on a trade and get anew laredo for 43k...Help
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It needs to be assessed. You may be better off with a remanufactured long block at that mileage. Depending on the amount of internal damage & if this is the only problem with the vehicle, this way out may be the most sensible.
Mopar has discontinued their reman, but use this part number in your search for reference.
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The 3.6 is an excellent engine, and not known for valve stem seal failures (that was the older Jeep 3.7, but they also made a 3.5 and 3.8 V6, none of which have anything in common with the Pentastar 3.6).

You need to shop around for the lowest mileage engine at the lowest price. Near me, there are lower mileage engines listing for $2000 and less. Unless the car is absolutely pristine, it would not be worth the thousands of dollars in tear-down costs, nor a high-dollar reman engine.

Here's a link to Car-Part, hop on there and you should be able to find something that will work.

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The 3.6 is an excellent engine, and not known for valve stem seal failures (that was the older Jeep 3.7, but they also made a 3.5 and 3.8 V6, none of which have anything in common with the Pentastar 3.6).

You need to shop around for the lowest mileage engine at the lowest price. Near me, there are lower mileage engines listing for $2000 and less. Unless the car is absolutely pristine, it would not be worth the thousands of dollars in tear-down costs, nor a high-dollar reman engine.

Here's a link to Car-Part, hop on there and you should be able to find something that will work.

I found a 130k engine at fox salvage yard --for 1850--but they want 3200 to install---I found a claimed 50k engine for 3600 that michigan motor exchange said they would install for 2k...i found a guy rebuilder on fb who want 5k to terar mine apart-rebuild and 3 yr warranty installed price 5k...i found dealer wanting 11k long blok installed....i found a guy named stan in west side of flint that repairs motors dealers screw up with a wait list and a additude.... i am taking to dealer week from thursday for 2 day diagnostic ....maybe i will luck out....i called the brownstown auction its 25 bucks to run thru the line saturday...i would put 5 or 6k min and just go back to driving the 2001 limited i parked. hoping someone knew someone honest here to take it to...scared of a gamble with unknowns ...I also found the long block at mopar for 4858. He claimes same motor dealer would buy....burning out ..thanks all
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WOW, so much for that "Lifetime Bumper to Bumper" deal eh. Although, if the dealer documented the excessive oil loss, would they not have some sort of obligation to honour the warranty??? Maybe the dealer had already discounted the excessive oil loss as a lack of maintenance issue and voided the warranty, lots of ways for them to get around it I guess. It sucks for sure man and I hear ya...I'm sure if you were confident in the installer and engine, you wouldn't have posted up here. I feel for you...let us know what you decide to do.
WOW, so much for that "Lifetime Bumper to Bumper" deal eh. Although, if the dealer documented the excessive oil loss, would they not have some sort of obligation to honour the warranty??? Maybe the dealer had already discounted the excessive oil loss as a lack of maintenance issue and voided the warranty, lots of ways for them to get around it I guess. It sucks for sure man and I hear ya...I'm sure if you were confident in the installer and engine, you wouldn't have posted up here. I feel for you...let us know what you decide to do.
i will decide soon--starting with kid taking in to get trade in price tomorrow--step 2 if i dont want new-take to auction run thru this sat...25 buck fee if no sale thinking setting min at 6k--if no buyer then junk yard motor with 2k install
WOW, so much for that "Lifetime Bumper to Bumper" deal eh. Although, if the dealer documented the excessive oil loss, would they not have some sort of obligation to honour the warranty??? Maybe the dealer had already discounted the excessive oil loss as a lack of maintenance issue and voided the warranty, lots of ways for them to get around it I guess. It sucks for sure man and I hear ya...I'm sure if you were confident in the installer and engine, you wouldn't have posted up here. I feel for you...let us know what you decide to do.
Lifetime Warranty is not transferable to new owner. Never has been as far as I know. It only applies to the purchaser of the contract.
I would ask the rebuilder if they’ve rebuilt these engines before.
I would go with a used, guaranteed engine or a reman from a known source. Given the age of the vehicle I’d try to be economical with the choice.
I’m not sure expecting $6k at auction is realistic.
update- found last mopar remanufactured long block- in state- got 25 percent off employee discount- being delivered to licensed mechanic today-paid over phone-am ex-part 3year warranty-price 5900 -600 core return---install 1800 plus whatever i need not on long block- what should i also change out-injectors coils etc.?
Lifetime Warranty is not transferable to new owner. Never has been as far as I know. It only applies to the purchaser of the contract.
Correct- but figuring he had it made me think no issues or he would have used warranty---that said I have it on my 2014 tc mini van -cost was 2800---never used it yet--we shall see----not offered now max is 125k warranty....until next recession probably- question to you sir--what if I sold it back to the original owner---could he have gotten motor replaced? or does the language say warranty is void once sold? Motown
update- found last mopar remanufactured long block- in state- got 25 percent off employee discount- being delivered to licensed mechanic today-paid over phone-am ex-part 3year warranty-price 5900 -600 core return---install 1800 plus whatever i need not on long block- what should i also change out-injectors coils etc.?
Hmmm, the rest of the vehicle is good??? That would be the absolute limit of what I'd put into it, even now as I think about it I'm starting to lean on the "no" side. Tough choice!!
Correct- but figuring he had it made me think no issues or he would have used warranty---that said I have it on my 2014 tc mini van -cost was 2800---never used it yet--we shall see----not offered now max is 125k warranty....until next recession probably- question to you sir--what if I sold it back to the original owner---could he have gotten motor replaced? or does the language say warranty is void once sold? Motown
Once sold, I'm sure it voids the contract.
You could hope they never checked the owner records, but if they ever did find out you'd probably be liable to reimburse them for the repairs and the cost would probably me quite high. And you and the original owner would possibly be exposed to fraud charges.
Once sold, I'm sure it voids the contract.
You could hope they never checked the owner records, but if they ever did find out you'd probably be liable to reimburse them for the repairs and the cost would probably me quite high. And you and the original owner would possibly be exposed to fraud charges.
Wasn't thinking of myself-just wondering as a employee if they protected themselves incontract language--I know the law stuff--do u have the enabling ?
Hmmm, the rest of the vehicle is good??? That would be the absolute limit of what I'd put into it, even now as I think about it I'm starting to lean on the "no" side. Tough choice!!
The rest of the vehicle is as new-minus a scratch on bumper- with aluminum lines that wont rust-stainless exhausts that last -and 189k on her so far- this was a no brainer compared to trusting the other aftermarket rebuilders-junk yards and having to deal with them. A replacement Laredo with cloth seats is now with 3500 rebates and 1500 rebate if financed thru Chry Capital is $40,035 out the door from Moran in Port Huron.
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Did you actually check or have someone check for a clogged catalytic converter and exhaust. The loss of power and egg smell is the reason I'm asking. I'm not a mechanic or as smart as most of the guys here, but I don't see where anyone ever suggested checking these. If you have a clogged cat con and replace the engine, you're still going to have problems and might be out a lot of money you didn't really need to spend. IDK, just guessing.
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Did you actually check or have someone check for a clogged catalytic converter and exhaust. The loss of power and egg smell is the reason I'm asking. I'm not a mechanic or as smart as most of the guys here, but I don't see where anyone ever suggested checking these. If you have a clogged cat con and replace the engine, you're still going to have problems and might be out a lot of money you didn't really need to spend. IDK, just guessing.
no -due to how it runs 24 mpg just uses oil---although code now says oxy sensor---will do after fact ---want this to last so no buyers remorse on this new mopar long block reguardless--reason being my mechanic at Jeep said he
d go rebuilt due to 130 commpression tests -135 alll cyl says he'd like to see it higher--and thus would just go rebuild now--thanks
You're absolutely right about the cost. You're money ahead without a car note for the next 5-7 years. I used to run the streets of Nashville with some guys from Port Huron. Do you know any of the Schmitts or Adairs? They worked for Northern Telecom.
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