Broken timing belt 2006 3.5L Santa Fe, now what? - Hyundai Forums : Hyundai Forum
 
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#1 Old 11-21-2011, 04:18 PM
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kes2golf
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Broken timing belt 2006 3.5L Santa Fe, now what?

My 2006 3.5L Santa Fe was involved in a low speed collision with damage to the rear driver side door and bent a support structure that had to be cut off and a new one welded on. Picked up the car and while driving home it quit running.

Engine wouldn't crank, towed back to body shop. They said the timing belt is broken and even the metal gear is shattered and lying in the compartment.

Vehicle has 103,000 miles and I never replaced the timing belt (yes I'm an idiot). The shop is assuming that a new engine will be needed.

So my questions are how often does a metal timing gear break due to the timing belt breaking? and how likely could it be that a low miles per hour side impact (car was being driven, not parked, if that matters) could have caused a problem with the timing belt?

Is it just bad luck that it crapped out while driving it home from the body shop? I did drive it there with no problems so I'm assuming they're not related but I'm no expert. My daughter was driving so I have no idea if there were warning signals prior to it going.

From reading other posts I'm pretty sure this is not a free floating engine so there is likely significant engine damage. Is there a typical failure mode assuming about 40 miles an hour at time it broke? Bent valves certainly, but would it need heads, pistons, rings, whatever? Trying to get a handle on what all might be involved and whether an experienced mechanic could overhaul it for a reasonable price or does a new engine sound more likely?

Just spent $500 on paying a deductible for a car that now has a blown engine. Wonderful.

Thanks in advance for any replies.
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#2 Old 11-21-2011, 07:14 PM
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revmup
The damage comes from not only the timing belt, but usually more than one person cranking over the engine, trying to get it running, and trying to diagnose the problem. My opinion, and the cheapest solution, is find someone to install a junkyard engine. There has to tons of them out there with lots less than 103K. And this time put in a new belt before installing the "new" engine.

Last edited by revmup; 11-21-2011 at 07:16 PM.
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#3 Old 11-21-2011, 07:34 PM
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Yeah, don't waste your time thinking about heads, pistons, etc. Cost too much money and will never be the same.

Car-part.com for a motor near you.

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#4 Old 11-21-2011, 09:23 PM
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santa06 is an unknown quantity at this point
I changed mine at 145kms or just under 100k miles ; could still read the part number of the belt but wasn't comfortable waiting longer.

Just bought a 05 XD for my son with 180k kms with the original belt; I changed it the next day. Sometimes its luck of the draw.

Good advice buying whole engine and installing new belt. In fact change the hydraulic tensioner, water pump, idler, tensioner bearings and crank position sensor. Sounds expensive but this motor is a bear to work on. You don't want to be going behind that cover again for any reason except the next belt change. The labor with the engine accessible will be less than half IMO. Use the OEM parts on a job like this, they are better. Fourgreen Auto has a full timing belt kit on ebay with pump for good price.
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#5 Old 11-21-2011, 10:46 PM
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kes2golf
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So three votes to replace the engine.

It was a big enough pain just changing the spark plugs so I can imagine the nightmare working on the engine. Not something I could handle.

My son-in-law's father is a retired dealer mechanic, but doesn't have much experience on Hyundai's. He's going to look at it on Wed. but I think I already know the answer.

I searched using that car-part.com link and found a 2001 2.7L engine with 77,000 miles on it close by. Would that be interchangeable with my 3.5L 2006 engine?

Anyone know how many hours and/or cost an engine swap would normally run? Would like to have a ballpark for when I start looking for a shop or individual to do it.

It's at the body shop now and they were going to check into a used engine for me, but maybe I'd be better off with a Hyundai dealer?

Thanks again. Not looking like much of a happy thanksgiving so far.
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#6 Old 11-21-2011, 11:24 PM
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revmup
Timing Belt?

I would not let a body shop do an engine change like this. There are exceptions to this, but a body shop is not normally equipped with the tools, personel, or knowledge to do this. Like I said, there are exceptions, but not many. Every single bolt on a front drive car related to the engine in general is different. No two bolts are the same, nor do they serve the same purpose. Are they ALL going back in the same place? Think about it. There are hundreds possibly involved in this situation. A dealer might not be the answer either. Some of them can be good, but get a price first. Their labor rate might be excessive. Find a GOOD independant shop. Ask around, do your homework FIRST NOT AFTER THE JOB IS DONE! The cheapest price might also be the worst job. You get what you pay for. Then again not. It's a shell game. DO YOUR RESEARCH!
Gates makes the timing belts for Hyundai. As for the engine, I would only install what you have. There could be too many minute differences that could trip you up converting to a 2.7

Last edited by revmup; 11-21-2011 at 11:27 PM.
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#7 Old 11-22-2011, 12:38 AM
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santa06 is an unknown quantity at this point
The 3.5 has the five speed tranny , not aware of any 2.7 being used with it. Might be able to get adapter plate etc , by why bother.

Kia uses the 3.5 in quite a few of their vehicles, as someone said there should be lots around, LKQ wreckers look up. Although Gates makes belts, my OEM belt said made in Korea by Dayco.
Aftermarket in easy to get at locations is okay; timing belt doesn't follow in that category. I got to replace an Elantra water pump a second time in 40k miles by saving $25 with an aftermarket reman unit.

I agree with getting a firm written install price right up front. Body shop changing engine might be better than local mini lube ; if they are reputable. Dealer as stated would likely be way too expensive. Replacing engine time won't be much longer than changing out the belt IMO ; and I changed my 3.5 Sante Fe timing belt in my garage (and have worked on cars for 25 years).

Another reason to stay with 3.5 is ECM car computer issues; different sensors etc can turn engine swaps into a big pain in the ass on newer cars IMO.

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#8 Old 11-22-2011, 11:55 PM
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lovemysantafe is an unknown quantity at this point
The 3.5 liter is a bit of female dog to work on if you catch my drift and I'd say it's a job best left to a professional mechanic, not a body shop. But I can guarantee you with 99.99% certainty your engine is done for as all Hyundai engines are interference engines, there's catastrophic damage to the valves and all related components there. Find a good donor engine and call it good...looking at swapping out other engines and transmissions is just going to add to your trouble and frustration, not relieve it.

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#9 Old 11-25-2011, 02:05 PM
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So no chance I could just get by with heads? The rods are for sure bent? If I had someone put in a used engine what am I looking at, $4-5K? Body is in good shape, but it seems risky to put in a used engine that might not have been well maintained vs trying to cut my losses. I'm broke and desperate so there really is no good option and I can't afford to get this wrong.

Is it usual for the metal gear to have broken in pieces when the timing belt broke?

Thanks
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#10 Old 11-25-2011, 08:07 PM
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jsinton is an unknown quantity at this point
No way to tell how much damage you got without putting on a new belt and turning by hand. If it all feels okay, you can try a compression test. Sometimes you get lucky, but you said a "metal gear is shattered"... doesn't sound good.

Used motors are expensive for that car. They want as much as $1800 for a really good one. You can probably get it installed for $500 or so.

If it was my car, I'd probably just accept the loss, and get another junk car. It would be a lot cheaper for me.

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