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#3
05-11-2010, 10:10 PM
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I don't know of any diesel that is non-interference.
-J
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket  Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E. 
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#4
05-11-2010, 10:13 PM
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interference... Yeap definably interference!!!
__________________
92 300D 2.5L OM602 OBK #59
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#5
05-11-2010, 10:21 PM
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In my limited experience if a diesel car is at idle that has hydralic lifters there seems to be enough give to just need a new timing chain or belt.
At speed the senario is always very different. Fortunatly a lot of timing belts on diesels seem to fail at start up or shutdown.
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#6
05-11-2010, 10:22 PM
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Quote:
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 560SL convertible 1987 190D 2.5-5SPEED!!!  1987 300TD 2005 Dodge Sprinter 2500 158"WB 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#7
05-11-2010, 10:57 PM
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Your Kubota pops the valve open a hair during the compression stroke, and closes it before the piston reaches TDC. Clearance in any diesel is in thousandths of an inch, if you had a valve hang open more than just a bit, it'd get smacked.
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#9
05-11-2010, 11:45 PM
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One of my best craigslist e-mail arguments ever was with some crazy person that thought 300E (m103) motors were non-interference.
 She was selling a 300E as "needs only a timing chain". I said "it will need a lot more than that if it broke the chain" and so began the arguement.
__________________
-diesel is not just a fuel, its a way of life-  '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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#11
05-12-2010, 11:47 AM
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What exactly occurs typicaly when the chain breaks ?
Does it bend the valves ? or Does it crack the head ? or Does it break the piston(s) in my experieince with gas engines it usually is limited to bending the valves thanks
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#12
05-12-2010, 02:36 PM
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Bent valves, if you're lucky. Typical damage seems to range from bent rods to broken cams and cam towers, cracked pistons, broken head bolts, etc.
The last gasser I had lose a belt was an 85 Honda Accord, it pitched the belt at about 4500rpm. Bent valves, broke the cam, shattered one piston, and split a bore. Very bad day.
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#13
05-12-2010, 02:46 PM
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Makes you long for the days of Engines that had only Timing Gears and Pushrods istead of Timing Belts or Chains.
I managed to drop a Screwdriver into the Timing Belt on the Volvo (I had long ago removed the several piece Timing Belt Guard). It happend at idle speed and I bent 2 Valves and Cracked several Tappets. What made it really sad was this was about 2 years after I had rebuilt the Block. My carlessness could have ruined a lot of work.
__________________
84 300D, 82 Volvo 244Gl Diesel
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#14
05-12-2010, 03:40 PM
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ALL automotive diesels are interference engine. With a 20:1 compression ratio, the combustion chamber is so tiny that there's no way around it.
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