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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 08-30-2009, 05:00 PM   #1 (permalink)
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Exclamation Timing Belt

hey all! so this is what happened to me the other day.i was driving home,and was turning left up a hill and gave it gas in the turn and the car died!!,so i triedto restart i and nothing but the sound of the starter.i believe its the timing belt broke,so i bought a new one to replace it. so my question to you guys is whats the chances of doing any damage like bad valves etc.... thanks all
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Old 08-30-2009, 07:01 PM   #2 (permalink)
OMFG another one!?
 
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I think the engine is of the interference type; if it was turning enough, there may be piston to valve contact issues.
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Old 08-30-2009, 09:27 PM   #3 (permalink)
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take the valve cover off and crank the motor, if no move ment then its your belt. If you didnt hear any "clunking" sounds from the motor while cranking it then you should be fine on valves and what not.
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Old 08-31-2009, 08:42 AM   #4 (permalink)
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thaks all..i heard no clunking so i feel better!..u guys rock
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Old 08-31-2009, 11:11 PM   #5 (permalink)
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Do we need to replace any timing built on the new vehicles?
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Old 08-31-2009, 11:33 PM   #6 (permalink)
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Firstly, you need to know if the car in question is cam timed by belt or chain. If so by belt, then yes at about 60,000 miles (100.000 km). If by chain, that is normally close to total engine service life.
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Old 09-01-2009, 06:14 AM   #7 (permalink)
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well the bmw is dead!!!!
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Old 09-01-2009, 07:08 AM   #8 (permalink)
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Was the damage more than the belt?
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Old 09-01-2009, 07:23 AM   #9 (permalink)
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Originally Posted by witeshark View Post
Firstly, you need to know if the car in question is cam timed by belt or chain. If so by belt, then yes at about 60,000 miles (100.000 km). If by chain, that is normally close to total engine service life.
On the m20, 50,000 is the interval.

OP, the engine is probably gone. The m20 is a very high interference engine, meaning the valves open very far into the cylinder ... chances that you didn't break something (pistons, valves or even a rocker arm) are very very slim. If you open it up and you don't have any damage past the actual belt itself, go and buy a lottery ticket right away.
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Old 09-01-2009, 10:24 AM   #10 (permalink)
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removed valve cover and found broken rockers and springs....
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Old 09-01-2009, 10:27 AM   #11 (permalink)
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Very sorry to see that, and piston damage may be an issue. But I wouldn't give up right away; ask around or Google for an M20 rebuilt head. They can be had for a reasonable amount.
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