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 timing belt concern ahead of long drive
#955092
07/22/09 07:33 PM
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Joined: Jan 2007
Posts: 73
OP
Getting the Wheeling Fever
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I have a 95 montero with 151K and havent had the timing belt changed since about 70K and am trying to decide if it needs to be changed before i return to ohio (currently in NC). One question i have is if the timing belt were to break, would it cause catastrophic damage to the engine? I know some cars have an interference and noninterference valve set up but i was unsure in the case of the montero. As you can tell by my question my knowledge of automechanics is limited. Just trying to decide if this job can wait till i get back to my usual mechanic or if i need to find someone here and get it done. Thanks
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Re: timing belt concern ahead of long drive
[Re: jasonjj]
#955093
07/22/09 07:43 PM
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Joined: May 2007
Posts: 4,628
Roll Me Over
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Both the 3.0 and the 3.5 in 95 are interference engines. So, yes, timing belt failure would likely be very catastrophic. That being said, I'd take it home to my usual mechanic.
Fasteddy's advice is occasionally sound...
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Re: timing belt concern ahead of long drive
[Re: hazy_daze]
#955094
07/22/09 09:10 PM
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Joined: Jan 2001
Posts: 13,649
Web Wheeler
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The "standard" timing belt change interval is about 60k, so you ought to be halfway thru your third one. That said, that interval is probably set so that the miles to failure graph put's that interval in the under 1% chance of failure category. Especially on an interference engine like yours. I agree with Hazy, drive it home, unless removing one of the belt covers discloses lots of fraying and chunking or cracking or missing belt teeth.
Just to make you worry, the sound of the belt breaking is utter silence. You never hear the valves hitting the pistons. The motor just quits running...
Not responsible for advice not taken...
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Re: timing belt concern ahead of long drive
[Re: fasteddy]
#955095
07/24/09 05:55 AM
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Joined: Jan 2007
Posts: 73
OP
Getting the Wheeling Fever
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The "standard" timing belt change interval is about 60k, so you ought to be halfway thru your third one. That said, that interval is probably set so that the miles to failure graph put's that interval in the under 1% chance of failure category. Especially on an interference engine like yours. I agree with Hazy, drive it home, unless removing one of the belt covers discloses lots of fraying and chunking or cracking or missing belt teeth.
Thanks for the tips guys. I called the dealership and made an appointment to have them do the work. I actually already had a belt and waterpump i had bought from mitsubishiautoparts.net so i just have to pay labor, which wasnt as bad as i was expecting givin that its the dealership. Oh, and when speaking with the person she said that mine was a noninterference engine, but stated that the noninterference engines are the ones the cause damage and the interference ones didnt? She said it was the opposite of what it sounded like? MAybe she was confused. anyway, hopefully i can avoid that horrible silence you mentioned!
Just to make you worry, the sound of the belt breaking is utter silence. You never hear the valves hitting the pistons. The motor just quits running...
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Re: timing belt concern ahead of long drive
[Re: jasonjj]
#955096
07/24/09 11:27 AM
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Joined: Feb 2004
Posts: 10,238
Web Wheeler
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she said that mine was a noninterference engine, but stated that the noninterference engines are the ones the cause damage and the interference ones didnt? She has it bassackwards on which ones crash the valves into the pistons. Of the 3.0L variants, only the 12v/SOHC/8.9:1 CR engines are non-interference. Any of the 24v, DOHC engines or 12v/SOHC/10.0:1 CR engines are an interference design. Frank
'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum
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Re: timing belt concern ahead of long drive
[Re: fasteddy]
#955097
07/24/09 03:37 PM
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Joined: Jun 2003
Posts: 7,356
Trail Leader
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Standard interval is 60k, except for CA where it is 100k. No difference between parts, trucks, builds, etc. When asked, my local stealer tried to tell me it was because our climate in OH is harsher for wear and tear than CA. I told him rubbish of course and that even if true, there are other climates more like CA.
Bottom line looks that CA mandated 100k warranty for whatever reason and Mitsu must have done the math on chance of failure and rusultant warranty expense and said okay.
Big Truck: 00, 3.5, Endeavor, 5-Spd drive line in hand! Little Truck: 87, 2.6T I/C, MT, LSDs, Tonneau Top Her Truck: 03, 3.8, 20th Anniv, 65k Daughter's: 06 Eclipse, Keeping it Mitsu! FSMs: MitsubishiLinks.com
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Re: timing belt concern ahead of long drive
[Re: FrankR]
#955098
07/25/09 01:43 AM
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Joined: May 2007
Posts: 570
Rock Warrior
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She has it bassackwards on which ones crash the valves into the pistons. Of the 3.0L variants, only the 12v/SOHC/8.9:1 CR engines are non-interference. Any of the 24v, DOHC engines or 12v/SOHC/10.0:1 CR engines are an interference design.
Frank Way to clerify, because i was reading this and thinking about how mine is a non-interference motor but didnt know about the others. Man i learn something new everyday on this board <img src="/forums/images/graemlins/lol.gif" alt="" />.
93 montero sr 3 inch body lift 31x11.50 super swamper ltb, 2 8inch 130 watt pro comp off road lights, 2 55w lights on the rear bumper, rear air locker, magnaflow exhaust muffler,superwinch manual hubs,15x8 black rock crawlers (steel)
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