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the_mad_electrician
Joined: 16 Nov 2009
Posts: 1073
Location: Central Georgia
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 Posted: Mon Jan 24, 2011 7:51 am Post subject: Shreaded Timing belt! |
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driving along the interstate engine starts running wierd then not at all. Pop the hood and all the teeth on the timing belt are Gone! Damn I just replaced that thing 6 months ago. Got a new one but I had to leave my car on the side of the road because I have to go get the kids. 
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81 924 N/A
2004 Ranger "Edge"
2005 Mazda 6 |
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!tom
Joined: 28 Aug 2006
Posts: 1941
Location: Victoria, BC Canada
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| Posted: Mon Jan 24, 2011 8:16 am Post subject: |
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Tension must have been incorrect.
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78 924 NA
5-lug |
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the_mad_electrician
Joined: 16 Nov 2009
Posts: 1073
Location: Central Georgia
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| Posted: Mon Jan 24, 2011 8:43 am Post subject: |
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| !tom wrote: | | Tension must have been incorrect. |
Too tight or not tight enough? The haynes manual said to tighten it until you could twist it 90 degrees....
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81 924 N/A
2004 Ranger "Edge"
2005 Mazda 6 |
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Martijnus
Joined: 29 Dec 2006
Posts: 2019
Location: Netherlands
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| Posted: Mon Jan 24, 2011 10:03 am Post subject: |
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| the_mad_electrician wrote: | | !tom wrote: | | Tension must have been incorrect. |
Too tight or not tight enough? The haynes manual said to tighten it until you could twist it 90 degrees.... |
so the tough guys have a more manly amount of tension on their belts. 
It's a good indication though... but I thought it was too tight and gave it a little bit less.
Haven't had any problems with that.
So I guess yours was too tight. Too little tension would cause it to slip once, I guess... while too much tension wears it out really fast.
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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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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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| Posted: Mon Jan 24, 2011 10:04 am Post subject: |
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Tensioner fail.
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Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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CorsePerVita
Joined: 25 Jul 2008
Posts: 1992
Location: Redmond, Oregon
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| Posted: Mon Jan 24, 2011 11:05 am Post subject: |
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Agreed with rasta. Something bound it up or it was way too loose and started skipping teeth. Look on the bright side, it's not a 944, so line up the marks and put a new belt on, good to go. Well... and replace the tensioner if that's the issue.
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- 1977 Porsche 924 2.0 N/A (Trackday Project)
- 1979 Porsche 924 2.0 N/A (The other daily)
- 1980 Porsche 931 (Daily)
- 1987 Lamborghini Jalpa
- 1999 Ducati 900SS |
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the_mad_electrician
Joined: 16 Nov 2009
Posts: 1073
Location: Central Georgia
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| Posted: Mon Jan 24, 2011 11:39 am Post subject: |
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Replaced belt car running fine but I think I will order a tensioner soon as I can!
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81 924 N/A
2004 Ranger "Edge"
2005 Mazda 6 |
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jacobscott209
Joined: 11 Dec 2010
Posts: 52
Location: Turlock, CA
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| Posted: Mon Jan 24, 2011 12:43 pm Post subject: |
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is the 2.0 an interference engine?
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the_mad_electrician
Joined: 16 Nov 2009
Posts: 1073
Location: Central Georgia
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| Posted: Mon Jan 24, 2011 12:52 pm Post subject: |
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Not the N/A, I think the turbo is though
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81 924 N/A
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2005 Mazda 6 |
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joecitizennn
Joined: 12 Sep 2005
Posts: 2096
Location: no mans land
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| Posted: Mon Jan 24, 2011 2:38 pm Post subject: |
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A 944, and you'd be dead.
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87 924s
88 924SE gone
447 hp cgt clone
87 924S gone
84 944 sold
83 944 sold
89 turbo S LSD, ABS etc
86 951 white rocket
85 944 sport everything.
84 944 sold.
87 944 sold |
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CorsePerVita
Joined: 25 Jul 2008
Posts: 1992
Location: Redmond, Oregon
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| Posted: Mon Jan 24, 2011 5:11 pm Post subject: |
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| jacobscott209 wrote: | | is the 2.0 an interference engine? |
nope, isn't it nice?  2.0L N/A is a non-interference.
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- 1977 Porsche 924 2.0 N/A (Trackday Project)
- 1979 Porsche 924 2.0 N/A (The other daily)
- 1980 Porsche 931 (Daily)
- 1987 Lamborghini Jalpa
- 1999 Ducati 900SS |
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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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| Posted: Tue Jan 25, 2011 1:36 am Post subject: |
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| the_mad_electrician wrote: | | The haynes manual said to tighten it until you could twist it 90 degrees.... |
BTW, this can be tricky if you have any hand strength whatsoever. I can twist mine 90° with the tensioner adjusted to max, which results in the belt being MUCH too tight. The key is not to twist it as far as you can, rather just to twist it until you can feel the belt begin to stretch. Takes some concentration, but you'll get a feel for the "stretch point."
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Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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Slam
Joined: 07 Jan 2005
Posts: 1689
Location: Wainwright, Alberta, Canada
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| Posted: Tue Jan 25, 2011 3:14 am Post subject: |
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I agree with Rasta. I use twist method, which results in a belt that's WAY too tight. Then I back it off until it stops whining. Replace the tensioner every couple of years. They're cheap.
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'84 944 - kid blew motor
'83 944 - resting comfortably. For 12 years
'87 944 - sideswiped by trucker
'80 924 - gone
'78 924 - gone
'77 924 - rusting comfortably |
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Ozzie
Joined: 12 Mar 2005
Posts: 4448
Location: Townsville, Qld. Australia
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| Posted: Tue Jan 25, 2011 8:08 am Post subject: |
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belts deteriorate over time.
I bought a belt once that lasted a week. Must have been real old stock.
The next one is still on there - bought elsewhere.
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Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance |
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Lizard
Joined: 03 Nov 2002
Posts: 9364
Location: Abbotsford BC. Canada
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| Posted: Tue Jan 25, 2011 12:45 pm Post subject: |
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Only buy Gates belts.
Contitech belts are junk.
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3 928s, |
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