breaking timing belt hurts engine?

trailinTaco · 11-27-2008, 03:46 PM

i have a 2000 toyota tacoma with a 3.4L. i have 102,000 miles on it and ive heard that you have to replace your timing belt at 90,000. does anyone know if on this vehicle when the timing belt breaks if it hurts your engine?

sonjay · 11-27-2008, 04:41 PM

if the timing belt breaks it is definitely not good for your engine, weird things happen, valves hitting pistons for one. Im not sure at what milage to replace them?

phantom · 11-27-2008, 04:49 PM

it can kill the engine! and be very expensive for you
think the rule of thumb is 100K
and while you are in it might do the water pump as you will be in that area
(and all hoses if not replaced recently
when a piston kisses a valve ( that will not be moving) it will break the piston and/or bend the valve

Ridgerunner · 11-27-2008, 04:52 PM

You gotta get that done NOW. That belt breaking means the top and bottom of the motor flying out of sync and motor parts colliding as said by sonjay! THAT is the one replacement not to be cheap about or gamble with.

chris4x4 · 11-27-2008, 04:58 PM

Whoa!!! The Tacomas 3.4 engine is a NON interferance engine. If the timing belt breaks, the engine will simply stop running. Nothing will be destroyed, and no valves are going to hit the pistons.

Ridgerunner · 11-27-2008, 05:03 PM

Sorry for the mistake and thank you Chris for the correction

-I assumed from my Honda days.

Banshee · 11-27-2008, 05:04 PM

Interference engine: When belt breaks valves can occupy same space as piston, equals bad.

Non Interference engine. When belt breaks valves do not occupy same space as pistons. Not bad other than engine does not run.

chris4x4 · 11-27-2008, 05:08 PM

Quote:

Originally Posted by Ridgerunner

Sorry for the mistake and thank you Chris for the correction

-I assumed from my Honda days.

Its ok, Buddy. ALOT of people think that if a belt breaks, their engine is shot, and if its an iterferance engine, its a BIG dollar repair, as in, best case, valves need to be redone, worst case, valves, and pistons, + more. Always better to be safe.

Monkeysuncle · 11-27-2008, 06:51 PM

I bought my 1999 Tacoma 3 years ago, with 56,000 miles. Had some extra cash at the time and did the belt, water pump, cam seals. Turns out the Water Pump was showing signs of wear by leaking at the weap hole in the h2o pump. So a good find, also it's a good idea to change your coolant often, I do mine once a year, it helps keep galvanic corrosion to a minimum( Steel Block Aluminum Heads) the dissimilar metals in contact will actually cause corrosion in the aluminum heads...='s bad water passages in the head.

humanoid · 11-27-2008, 08:13 PM

FYI to all, timing belt needs to be replaced at 90K miles, not 100K, RTFM.

Janster · 11-28-2008, 05:44 AM

Quote:

Originally Posted by humanoid

FYI to all, timing belt needs to be replaced at 90K miles, not 100K, RTFM.

On 1st or 2nd gens?
I had a 96 3.4L and the timing belt was recommended to be changed at 60K miles.

chris4x4 · 11-28-2008, 05:47 AM

Quote:

Originally Posted by Janster

On 1st or 2nd gens?
I had a 96 3.4L and the timing belt was recommended to be changed at 60K miles.

It would only be on the first gens., as the second gens have a chain.

Ridgerunner · 11-28-2008, 06:26 AM

Quote:

Originally Posted by Janster

On 1st or 2nd gens?
I had a 96 3.4L and the timing belt was recommended to be changed at 60K miles.

The later '98s-'04s say 90,000 miles. Interesting thing is I googled "3.4 timing belt breaks" and there's a few sites that claim "serious engine damage will occur"...WIKI answers even said the 3.4 is an "interference engine" which I know is totally wrong now. So I feel better knowing I aint the only one who foibled on this one

chris4x4 · 11-28-2008, 07:40 AM

Quote:

Originally Posted by Ridgerunner

The later '98s-'04s say 90,000 miles. Interesting thing is I googled "3.4 timing belt breaks" and there's a few sites that claim "serious engine damage will occur"...WIKI answers even said the 3.4 is an "interference engine" which I know is totally wrong now. So I feel better knowing I aint the only one who foibled on this one

LOL, well, they also say it has a timing chain AND a belt. LMAO!

sonjay · 11-28-2008, 10:56 AM

Quote:

Originally Posted by chris4x4

Whoa!!! The Tacomas 3.4 engine is a NON interferance engine. If the timing belt breaks, the engine will simply stop running. Nothing will be destroyed, and no valves are going to hit the pistons.

wow you learn something everyday, thanks chris for the info! I like that toyota went back to a chain on the 2nd gens too!!

11-27-2008, 03:46 PM	#1
trailinTaco Member Joined: May 2008, #6721 Location: Bel Air, MD Age: 19 Gender: Male Posts: 39 2000 Tacoma SR5 TRD 3.4L 4x4 2000 Access Cab Automatic 3.4 L V6 2 1/2 inch Daystar suspension lift with Fabtech shocks, 33 inch bfgoodrich mud terrain tires, Procomp alloy wheels, hella fog lights	breaking timing belt hurts engine? i have a 2000 toyota tacoma with a 3.4L. i have 102,000 miles on it and ive heard that you have to replace your timing belt at 90,000. does anyone know if on this vehicle when the timing belt breaks if it hurts your engine?

11-27-2008, 04:52 PM	#4
Ridgerunner Western Alliance: NorCal Joined: Mar 2008, #5269 Age: 47 Posts: 1,691 2001 prerunner doublecab limited 2001 Double Cab Automatic 3.4 V6 2001 with; cat-back twin exhaust,bullbar with hella 550's, camper shell, TRD off-road 2x4-black beauty.	You gotta get that done NOW. That belt breaking means the top and bottom of the motor flying out of sync and motor parts colliding as said by sonjay! THAT is the one replacement not to be cheap about or gamble with. __________________ Another fine sig by Piercedtiger!!

11-27-2008, 04:58 PM	#5
chris4x4 Western Aliance: Fix it Division Joined: May 2008, #6497 Location: Tempe ,Az Posts: 5,846 2007 PreRunner 2007 Double Cab Automatic 1GR-FE (4.0 V6) OME 885's, OME shocks, Total Chaos UCA's, TSB springs with AAL, 5100 rear shocks, custom built fuel tank skid plate	Whoa!!! The Tacomas 3.4 engine is a NON interferance engine. If the timing belt breaks, the engine will simply stop running. Nothing will be destroyed, and no valves are going to hit the pistons. __________________ The simplest solutions are often the most clever..............they are also usually wrong.

11-27-2008, 05:03 PM	#6
Ridgerunner Western Alliance: NorCal Joined: Mar 2008, #5269 Age: 47 Posts: 1,691 2001 prerunner doublecab limited 2001 Double Cab Automatic 3.4 V6 2001 with; cat-back twin exhaust,bullbar with hella 550's, camper shell, TRD off-road 2x4-black beauty.	Sorry for the mistake and thank you Chris for the correction-I assumed from my Honda days. __________________ Another fine sig by Piercedtiger!!

11-27-2008, 05:04 PM	#7
Banshee The one you are not! Joined: Sep 2006, #7 Location: Seattle'ish, WA Age: 31 Gender: Dude Posts: 1,028 2003 White Xtracab TRD Auto 2003 Xtra Cab Automatic 5VZ-FE Scangauge II Bilstein 5100's OME 880's Deckplate Mod.	Interference engine: When belt breaks valves can occupy same space as piston, equals bad. Non Interference engine. When belt breaks valves do not occupy same space as pistons. Not bad other than engine does not run. __________________ The 2 Rigs. 2008 FJC with Minor mods, ARB Bullbar with Warn M8000, cobra 75 WXST, Firestik 4', Bandi mount, ARB CKMA12, custom made rear cargo box. 2003 Tacoma. Xtracab, Auto, TRD, Bilstein 5100's, OME 880's Scangauge II, Deckplate mod. http://www.treadlightly.org/

11-27-2008, 04:41 PM	#2
sonjay Senior Member Joined: Oct 2008, #9834 Location: BC, Canada Gender: Male Posts: 253 05 Black DC 4x4 2005 Double Cab Automatic OME 885, Dakars, heated mirrors	if the timing belt breaks it is definitely not good for your engine, weird things happen, valves hitting pistons for one. Im not sure at what milage to replace them?

11-27-2008, 04:49 PM	#3
phantom Senior Member Joined: Oct 2007, #3036 Gender: Male Posts: 1,144 base tacoma 2007 Regular Cab Automatic 2.7 hitch and wiring,bullbars,fog lights,hand made seatcovers, rear speakers in a reg cab,truck alarm,vent visors,rear view mirror,black low profile truck box, bed bolt d rings,pop & lock,bed extender, CUSTOM n-fab step bars,timbrens,sockmonkey mod	it can kill the engine! and be very expensive for you think the rule of thumb is 100K and while you are in it might do the water pump as you will be in that area (and all hoses if not replaced recently when a piston kisses a valve ( that will not be moving) it will break the piston and/or bend the valve

11-27-2008, 06:51 PM	#9
Monkeysuncle My Cats Breath Smells Like Cat Food Joined: Aug 2008, #8809 Location: Florida Gender: Dude Posts: 159 99 Tacoma SR5 4x4 5 speed Manual Hubs 1999 Xtra Cab Manual 3.4 V6 Diff Breather	I bought my 1999 Tacoma 3 years ago, with 56,000 miles. Had some extra cash at the time and did the belt, water pump, cam seals. Turns out the Water Pump was showing signs of wear by leaking at the weap hole in the h2o pump. So a good find, also it's a good idea to change your coolant often, I do mine once a year, it helps keep galvanic corrosion to a minimum( Steel Block Aluminum Heads) the dissimilar metals in contact will actually cause corrosion in the aluminum heads...='s bad water passages in the head.

11-27-2008, 08:13 PM	#10
humanoid Mom says I'm special! Joined: Jun 2007, #1932 Location: Sunny SoCal Age: 40 Gender: Dude Posts: 1,349 I had a '99 Xtra Cab PreRunner SR5 V6 Automatic	FYI to all, timing belt needs to be replaced at 90K miles, not 100K, RTFM. __________________

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