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Join Date: Mar 2009
Posts: 90
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the 928 didn't make it
And I should have bought AAA with towing insurance before I left. 130 miles into my trip from Oregon to California - timing belt broke. I had it towed all the way home and then jumped in the BMW and made the trip. I'll get into it next week and hope I can tell why it broke - it was a fairly new belt. I'm thinking I should have bought one of the tension gauges instead of eye-balling it.
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05-22-2009, 05:23 PM
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So did you get the registration all squared away?
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1981 Porsche 928 "Euro" Auto Gunsmoke Metallic Flat - Black Interior 1983 Porsche 928S "US" Auto Light Bronze (Copper) Metallic - Brown Interior **SOLD** 
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05-22-2009, 05:56 PM
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Registered
Join Date: Jan 2008
Location: Sydney, Down Under
Posts: 228
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Is your '82 Euro a 300hp 4.7L 'S' model, or the 4.5L 928? (both were available in '82 in Europe/RoW)
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Various manual S4's |
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05-22-2009, 08:50 PM
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Network Native
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Location: SoCal
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The belts are very strong. When I bought an engine once the seller used the old timing belt instead of a chain to lift the engine out. It got hung up a couple times and the cherry picker raised the whole front of the car.
My two guesses are that the belt was over tightened and broke or bent some other part, or something else happened. Sometimes with the early Euro S motors a timing belt doesn't mean bent valves. Maybe it won't be too bad to fix. |
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05-22-2009, 09:27 PM
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Hi,
It's a 4.7L. It never made it to California, so I didn't get the title squared away. I'm going to give the paper work to my brother and let him visit DMV for me. I'm told there's a puddle of anti-freeze under the 928 right now. It didn't leak before the belt broke 
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05-24-2009, 07:32 AM
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928: Serial Enabler
Join Date: Sep 2007
Location: Elkhart, Indiana
Posts: 2,929
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I've rescued 3 928's that have been reportedly sitting a while.
In the first operation of the respective motors, every one of them ended-up with leaking water pumps, regardless of other issues. It happened in each case in my garage, though. Based on this, unless a car was previously and recently a daily driver, I'd tow it home.
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84,85,86 928 cars Last edited by Landseer; 05-24-2009 at 09:19 AM.. |
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05-24-2009, 09:16 AM
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In the scope of what things cost real money on a 928, towing is one that is worth it.
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05-24-2009, 10:07 AM
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Yup, the engine I bought for my 928 wasn't run in sometime, but had plenty of clues that it was recently rebuilt. I just turned the Water Pump pulley to see if the bearings were still ok and it sprung a leak exactly as I turned it. Pump still looked brand new on the outside. These engines hate to sit.
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1981 Porsche 928 "Euro" Auto Gunsmoke Metallic Flat - Black Interior 1983 Porsche 928S "US" Auto Light Bronze (Copper) Metallic - Brown Interior **SOLD**
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05-24-2009, 02:57 PM
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the 928 didn't make it - photo
So much destruction. The belt wound around the crank gear and grew to break everything.
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05-26-2009, 08:34 PM
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Loose belt?
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1981 Porsche 928 "Euro" Auto Gunsmoke Metallic Flat - Black Interior 1983 Porsche 928S "US" Auto Light Bronze (Copper) Metallic - Brown Interior **SOLD**
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05-26-2009, 08:38 PM
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So what failed and broke the belt in the first place?
I see a lot of debris like it might have been mistracking. |
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05-26-2009, 11:16 PM
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I won't speculate on why it broke until I get the belt off. I might be able to get the whole belt/gear off with one pull. The Cam gears and oil pump gear look ok and don't show signs of mis-tracking. The tensioner's push rod is bent - maybe too much pressure...Can I buy just the push rod for the tensioner or am I looking at the whole sha-bang?
Last edited by bedinator; 05-27-2009 at 07:49 AM.. |
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05-27-2009, 06:28 AM
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It looks like the old square tooth design, so I would replace it all with new HTQ round tooth gears etc.
First find out what is bad. If the tensioner is damaged inside, no point in looking for bits to replace instead of the whole thing. |
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05-27-2009, 08:24 AM
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Quote:
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1981 Porsche 928 "Euro" Auto Gunsmoke Metallic Flat - Black Interior 1983 Porsche 928S "US" Auto Light Bronze (Copper) Metallic - Brown Interior **SOLD**
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05-27-2009, 10:07 AM
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Registered
Join Date: Oct 2008
Location: Buena Park, CA
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yes, you have to change it all but it's supposed to be a superior design less prone to slippage.
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05-27-2009, 02:50 PM
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More Picures of the carnage:
  
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05-27-2009, 08:07 PM
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Registered
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That whole belt was wrapped into a donut around the crankshaft
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05-27-2009, 08:08 PM
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Network Native
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Did you set the crank to 45 degrees before you took off the damper?
I think you might be able to use the belt to measure counter clockwise back from crank gear starting at the kink and that will show what locked up. |
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05-27-2009, 08:57 PM
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Registered
Join Date: Apr 2004
Location: Noblesville, In
Posts: 85
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Interesting how the inside of the tensioner roller is so beat up and the outside is still perfectly round.
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07 Yukon Denali Blue Green Metallic, rolling on 22's 05 Jeep Laredo careened around town by child #1 06 Mustang rolling around town by child #2, in all it's bass thumping glory 88 928 S4 Black 90 928 S4 Linen Grey Metallic Sold 88 924s Black Sold 85.5 944 NA Grey Sold |
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05-28-2009, 10:10 AM
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Makes me think a much stronger belt and all sort of things might break before the belt does.
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05-28-2009, 10:21 AM
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