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Broken Timing Belt Rate Topic: -----

#1 User is offline   sundayDriver 

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Posted 25 January 2010 - 02:23 PM

This is a general question about EFI engines.

if the timing belt breaks, does that automatically mean the engine is stuffed? i.e. bent valves.

or are most engines smart enough to shut down to stop any damage.

sorry if this seems a stupid question.
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#2 User is offline   STARION 

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Posted 25 January 2010 - 02:29 PM

View PostsundayDriver, on Jan 25 2010, 03:23 PM, said:

This is a general question about EFI engines.

if the timing belt breaks, does that automatically mean the engine is stuffed? i.e. bent valves.

or are most engines smart enough to shut down to stop any damage.

sorry if this seems a stupid question.


no engines arnt smart enough, and yes it will shut down but not by choice :o , most modern engines will be ruined if you snap a belt..... always better to be safe than sorry. hope that helps.
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#3 User is offline   lightning 

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Posted 25 January 2010 - 02:41 PM

Prevention is better than cure.
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God created Turbo Lag to give V8's a chance.
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#4 User is offline   sundayDriver 

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Posted 25 January 2010 - 03:16 PM

thanks for the answers.

the engine in question is a toyota inline 4.
Just got off the phone from toyota. All toyota petrol engines are "free-spinning", meaning, that if the timing belt breaks, no damage.

that's a relief.
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#5 User is offline   reber 

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Posted 25 January 2010 - 03:31 PM

correct all toyota 4cyls are non interference.
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#6 User is offline   sundayDriver 

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Posted 25 January 2010 - 03:50 PM

I was reading about the toyobaru coupe last night and it said that toyota would use a boxer engine but with toyota heads. it makes sense now.
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#7 User is offline   sammyboy 

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Posted 27 January 2010 - 07:30 PM

View PostsundayDriver, on Jan 25 2010, 04:50 PM, said:

I was reading about the toyobaru coupe last night and it said that toyota would use a boxer engine but with toyota heads. it makes sense now.

so this means the new spriter has a subaru block with toyota heads so it will be a freespinning motor?
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#8 User is offline   reber 

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Posted 27 January 2010 - 07:36 PM

View PostBuilt h6, on Jan 25 2010, 07:11 PM, said:

are you sure? A mate borrowed his old girls carolla,i think is a sportivo or what ever they call them(2yr old car anyways) and then missed a gear at very high rev's,belt jumped car still drove..but bent some valve's and toyota still fixed it under warranty. I was amazed att..but his mum wasn't so amazed :) he cant borrow her car anymore.



sorry wasn't clear on that, if its a rolla that is newer than 02, its a timing chain motor which are interference. all toyota belt driven 4's are non interference
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#9 User is offline   sundayDriver 

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Posted 29 January 2010 - 08:27 AM

View Postsammyboy, on Jan 27 2010, 08:30 PM, said:

so this means the new spriter has a subaru block with toyota heads so it will be a freespinning motor?


I'm not 100% sure, but it seems logical.

I got the car back yesterday and it's fine. It seems a bit slow off from standstill, but I'm not sure if it's because I'm used to the subie.
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#10 User is offline   Shadoxity 

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Posted 29 January 2010 - 10:45 AM

View Postreber, on Jan 25 2010, 04:31 PM, said:

correct all toyota 4cyls are non interference.



We used to run an old ae86 corolla in khanacross. Timing belt snapped one time while racing and the engine was fine :) glad it was non interference
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