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Toyota 1MZ-FE, original timing belt at 292k #5426912 05/12/20 12:01 AM
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getawheel Offline OP
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2003 Highlander 1MZ-FE VVT-i, 292,511 mi, all factory timing components. I was surprised to see how good the belt looked. A testament to quality parts, I take back anything negative I’ve ever said about Toyota.
[Linked Image]
The water pump did not have long left, it was not making noise but turned quite rough by hand, bearings were shot. It had a couple months, tops. Glad I finally convinced the owner to do the job. We replaced the belt, water pump, tensioner and pulleys with OEM parts. Also did spark plugs (NGK Iridiums), PCV valve, ATF change (MaxLife), PS flush and obviously new coolant (Pentosin A1).

We’ve been maintaining this car for years but it’s impossible to get the owner to come in on time. It had 13,500 miles, 7 months on the last oil change I did (HK conventional), dipstick was dry. I filled it with M1 HM 5W-30 this time, rear main seal was dripping but the engine was dry otherwise. Maybe the M1 will slow the leak down, if it gets worse it’ll make no difference as I’d have ended up resealing the engine anyways. I’ve had good luck with M1 HM before so we’ll see.

Last edited by getawheel; 05/12/20 12:08 AM.

1993 Ford Mustang 2.3L/5-speed, 32k
2002 Ford Ranger 3.0L/5R44E, 254k
2002 Honda CR-V AWD 2.4L/5-speed, 169k
2006 Jaguar XJ8 Vanden Plas 4.2L, 103k
Re: Toyota 1MZ-FE, original timing belt at 292k [Re: getawheel] #5426933 05/12/20 12:55 AM
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BlakeB Offline
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Looks good! Did you also use Maxlife for the PS fluid?

Re: Toyota 1MZ-FE, original timing belt at 292k [Re: getawheel] #5426937 05/12/20 01:16 AM
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ctechbob Offline
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And here I felt bad letting my Accord go 128,000 on its timing belt, although much like that Toyota, it came out looking like it could go another 100k.


2008 Acura TL Type S-170k
2003 Honda Accord V6-222k
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Re: Toyota 1MZ-FE, original timing belt at 292k [Re: getawheel] #5426938 05/12/20 01:23 AM
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daves87rs Online Content
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Nice!


2020 Chevrolet Trax LS
2019 Chevrolet Equinox LS
2006 Chevrolet Cobalt LS
2004 Chevrolet Cavalier (project)

Re: Toyota 1MZ-FE, original timing belt at 292k [Re: getawheel] #5426998 05/12/20 06:17 AM
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diyjake Offline
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I am surprised you decided to a do a timing belt job on a car that with that many miles and a customer that lets their dipstick run dry, sounds like that motor might not have much life left.

Re: Toyota 1MZ-FE, original timing belt at 292k [Re: getawheel] #5427053 05/12/20 07:18 AM
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supton Online Content
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Sounds like it gets a lot of driving, so it's probably hit the magical spot for longevity. Few cold starts, few temp cycles. Lots of rotations on the bearings but maybe it all just got the right amount of usage over time so as to maximize life.

Not bad. Not for me but it sounds like the owner has it figured out to a T. Risky business but maybe they also don't care--when it breaks, they figured they have their monies worth already, so why bother worrying about it? Run it till she blows. Not my style in cars but I certainly have done that for push mowers...


2011 Toyota Camry, base, 2.5L/6MT, 205k, hers
2010 Toyota Tundra DC, 4.6L/6AT, 159k, ours
1999 Toyota Camry LE, 2.2L/4AT, 225k, his
Re: Toyota 1MZ-FE, original timing belt at 292k [Re: supton] #5427072 05/12/20 07:44 AM
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bbhero Offline
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I may well be wrong here...

Is this a non interference motor??

Well looked it up.. it is a interference motor...

Yeah... Not good to wait on that timing belt...

I'm glad it didn't break on ya.

Last edited by bbhero; 05/12/20 07:58 AM.

Nissan Altima 3.5 Coupe
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Re: Toyota 1MZ-FE, original timing belt at 292k [Re: bbhero] #5427121 05/12/20 08:38 AM
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LotI Offline
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Even a non-interference motor can break things when the belt goes. The valves may be ok but the belt goes somewhere.


03 Honda Interceptor
11 Kawasaki KLR 650
12 Ford E450
19 Buick Regal TourX
Re: Toyota 1MZ-FE, original timing belt at 292k [Re: getawheel] #5427141 05/12/20 09:02 AM
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Char Baby Offline
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Toyota/Lexus OE timing belts & parts in most of their vehicles(I say most 'cause IDK every single one), are frikken awesome. I've seen'em w/250k that looked almost new.

Last edited by Char Baby; 05/12/20 09:04 AM.

Retired 6 yrs now & lovin' it
-----------------------------------

'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'15 Nissan Altima 2.5 SV
'15 Honda Civic 1.8 LX
Re: Toyota 1MZ-FE, original timing belt at 292k [Re: getawheel] #5427257 05/12/20 11:19 AM
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twoheeldrive Offline
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Quality parts for sure.

When I changed the belt on my Toyota V8 after 18 years and 90,000 miles, the belt was fine, not worn, no cracks, but the tensioner had seized up.. The belt was still fairly tight, but probably would have loosened up over time.


... using Mobil 1 since 1976.
Re: Toyota 1MZ-FE, original timing belt at 292k [Re: supton] #5427268 05/12/20 11:37 AM
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getawheel Offline OP
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Originally Posted by BlakeB
Did you also use Maxlife for the PS fluid?

Nope, used bulk AAP/CarQuest Dex/Merc ATF

Originally Posted by diyjake
I am surprised you decided to a do a timing belt job on a car that with that many miles and a customer that lets their dipstick run dry, sounds like that motor might not have much life left.

It runs great and the car is in decent shape otherwise, I figured it was worth it. This owner has had the car since 40k and their maintenance practices haven’t changed a bit. I’m trying to get them to do more regular maintenance. It did have some oil in it, probably just under 4 quarts. If I could change it at 5k-7500 it wouldn’t ever get low.

Originally Posted by supton
Not for me but it sounds like the owner has it figured out to a T. Risky business but maybe they also don't care--when it breaks, they figured they have their monies worth already, so why bother worrying about it? Run it till she blows.

This is a tough one to figure out. The owner pays to have anything fixed when it breaks, but does no preventative maintenance whatsoever. I can’t explain it. It would be far cheaper in the long run to do regular fluid and filter changes and other maintenance items.


1993 Ford Mustang 2.3L/5-speed, 32k
2002 Ford Ranger 3.0L/5R44E, 254k
2002 Honda CR-V AWD 2.4L/5-speed, 169k
2006 Jaguar XJ8 Vanden Plas 4.2L, 103k
Re: Toyota 1MZ-FE, original timing belt at 292k [Re: getawheel] #5427271 05/12/20 11:39 AM
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slacktide_bitog Online Content
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Toyota makes the best cars happy

Working on the 1MZ is scary and difficult, which is why people put it off. I hope you replaced the valve cover gaskets too smile

Re: Toyota 1MZ-FE, original timing belt at 292k [Re: getawheel] #5427411 05/12/20 01:51 PM
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GSCJR Offline
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My co-worker changed his at just shy of 300k Kms. on his 1995 Camry but I chickened out and replaced mine several years ago at 185k Kms on my 2003 Highlander. I only replaced the timing belt and serpentine belts. Sold it last year with original timing components and water pump. This one trumps my story getawheel!

Last edited by GSCJR; 05/12/20 02:09 PM.

07 3.5L VQ35DE NAPA FS 5w-20 ProSelect 21358 158KM
10 3.5L 2GR-FE NAPA FS 5w-20 ProSelect 27047 180KM
Re: Toyota 1MZ-FE, original timing belt at 292k [Re: getawheel] #5427436 05/12/20 02:27 PM
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painfx Offline
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The owner must have been ignorance or cheap. This is an interference engine. One snap it is game over. Looks like he got lucky.

Re: Toyota 1MZ-FE, original timing belt at 292k [Re: painfx] #5427441 05/12/20 02:35 PM
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kschachn Online Content
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Originally Posted by painfx
The owner must have been ignorance or cheap. This is an interference engine. One snap it is game over. Looks like he got lucky.

No it is not an interference engine. I have changed timing belts on numerous 1MZ-FE engines and you can rotate the crankshaft with the cams in any position.


1994 BMW 530i, 252K
1996 Honda Accord, 288K
1999 Toyota Sienna, 434K
2000 Toyota ECHO, 284K
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