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Uh Oh! Timing belt failure, now what?

 
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joejax  



Joined: 02 Dec 2009
Posts: 919
Location: Jacksonville,FLA,USA

PostPosted: Sun Jul 17, 2011 10:33 am    Post subject: Uh Oh! Timing belt failure, now what? Reply with quote

Cruising along today at about 65 mph, suddenly a pop and engine quits. No other noise, just quit.

Coasted off the road, thought I was out of gas, pop the hood to find the belt shredded. Called buddy to tow home about 10 miles (fun).

Been running great lately, hope nothing else is broken. Should I be worried? Have belt and pulley, just haven't got around to change them, yet...
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flosho  



Joined: 01 Jul 2004
Posts: 3160
Location: Eau Claire, Wisconsin

PostPosted: Sun Jul 17, 2011 12:01 pm    Post subject: Reply with quote

This is on your 924 n/a?

No worries. It's not an interference engine like the turbo.
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924RACR  



Joined: 29 Jul 2001
Posts: 9075
Location: Royal Oak, MI, USA

PostPosted: Sun Jul 17, 2011 9:08 pm    Post subject: Re: Uh Oh! Timing belt failure, now what? Reply with quote

joejax wrote:
Have belt and pulley, just haven't got around to change them, yet...


Guess you will, now!
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'79 924 #77 SCCA H Prod racecar
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Martijnus  



Joined: 29 Dec 2006
Posts: 2019
Location: Netherlands

PostPosted: Mon Jul 18, 2011 12:07 am    Post subject: Reply with quote

I once ripped all teeth off at the highway..

no problem.
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the_mad_electrician  



Joined: 16 Nov 2009
Posts: 1073
Location: Central Georgia

PostPosted: Mon Jul 18, 2011 1:54 am    Post subject: Reply with quote

Martijnus wrote:
I once ripped all teeth off at the highway..

no problem.


The samething happened to be! I was driving about 75 MPH actually made it almost 3 miles
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Rasta Monsta  



Joined: 12 Jul 2006
Posts: 11733
Location: PacNW

PostPosted: Mon Jul 18, 2011 3:24 am    Post subject: Reply with quote

Running with cam timing off can fubar your injectors.
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joejax  



Joined: 02 Dec 2009
Posts: 919
Location: Jacksonville,FLA,USA

PostPosted: Mon Jul 18, 2011 5:21 am    Post subject: Reply with quote

Hee hee , Got lucky I guess, stalled on break, able to coast off busy 2 lane onto another road.

Had new belt in car but no tools. Changed today, not too bad of a job, I can see why so many leave that blasted cover off though.

I thought I read on here about a NA motor got damaged by belt failure, so I was worried. I may have been mistaken.
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fiat22turbo  



Joined: 18 Jan 2006
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Location: Portland, OR

PostPosted: Mon Jul 18, 2011 8:04 am    Post subject: Reply with quote

Only if you're running really high compression would a broken belt be an issue.
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1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)
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Martijnus  



Joined: 29 Dec 2006
Posts: 2019
Location: Netherlands

PostPosted: Fri Jul 22, 2011 6:23 am    Post subject: Reply with quote

Rasta Monsta wrote:
Running with cam timing off can fubar your injectors.


Mine didn't run ofcourse since it had as much teeth as your average meth addict.
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"Rule: Turbo's make torque, and torque makes fun." (C. Bell)

924 "50-jahre", 1981.
MSII/extra, LPG, ITB's, 5lug.
To be turbo'ed in a while.
Killed her at the Nurburgring, Porscheless at the moment
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Min  



Joined: 04 Nov 2002
Posts: 2368
Location: Vernon, British Columbia, Canada

PostPosted: Fri Jul 22, 2011 10:48 am    Post subject: Reply with quote

fiat22turbo wrote:
Only if you're running really high compression would a broken belt be an issue.


Or if the broken belt is a symptom of a different issue.

Min
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joejax  



Joined: 02 Dec 2009
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Location: Jacksonville,FLA,USA

PostPosted: Fri Jul 22, 2011 12:33 pm    Post subject: Reply with quote

Min wrote:
fiat22turbo wrote:
Only if you're running really high compression would a broken belt be an issue.


Or if the broken belt is a symptom of a different issue.

Min


What could be a different issue?
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the_mad_electrician  



Joined: 16 Nov 2009
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Location: Central Georgia

PostPosted: Fri Jul 22, 2011 12:52 pm    Post subject: Reply with quote

Cam seized up maybe? If something like that happened I think you'd know about it
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fiat22turbo  



Joined: 18 Jan 2006
Posts: 4040
Location: Portland, OR

PostPosted: Fri Jul 22, 2011 1:36 pm    Post subject: Reply with quote

Broken valve springs is another issue that could cause a valve and piston meeting.

Broken connecting rod, etc.


Both of these issues would be pretty obvious
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1979 924 Carrera GTS (clone-ish)
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Min  



Joined: 04 Nov 2002
Posts: 2368
Location: Vernon, British Columbia, Canada

PostPosted: Fri Jul 22, 2011 3:17 pm    Post subject: Reply with quote

In my case, seized a lifter, broke the cam belt, also broke the cam gear (cracked the hub) etc.

Min
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joejax  



Joined: 02 Dec 2009
Posts: 919
Location: Jacksonville,FLA,USA

PostPosted: Sun Jul 24, 2011 10:03 am    Post subject: Reply with quote

Ya'll got me more nervous than a long tailed dog in a room full of rockin' chairs!

Got to take it for a ride today, running OK, may need to adjust the timing a bit though..

Hotter than sacks of ball here, black on black is killin' me, no AC either, really need to get that fixed.
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