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Old 08-23-2009, 12:15 PM   #1
bimmer30
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M42 e30 timing chain

Hello guys,

I was just wondering how to check if my timing chain never snapped I heard these rarely snap but would like to really find out cause I am not really sure with my car dilemma as many of you may know. The car is a 1991 bmw 318i with M42engine timing chain driven. Pictures would help and steps as well thank you all
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Old 08-23-2009, 12:21 PM   #2
Berlin
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are you trying to find out if the timing chain is broken or if has broken in the past and has since been repaired?

if it is broken: the engine will not work.

if it failed during operation in the past: the engine will likely have been scrapped as well.

if you are hearing it slinging back and forth, slapping the case, it is stretched and old or the tensioner is going.
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Old 08-23-2009, 12:26 PM   #3
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Your car won't start if your timing chain has snapped. You'll need to remove the valve cover to inspect this. You'll also need to know what to look for when we're dealing with worn gears or chain. if it has snapped you won't have to worry about it because the guy would have had an extensive expense to repair the car and make it work again. These chains and gears typically don't wear out if the oil level is up and changes were done regularly. The timing chain tensioner - hydrolic - starts to give after a few hundred thous km. makes a clanking noise in the timing case. These are about 100.00 and easy to replace. The timing chain guides sometimes wear out too if not taken care of this is more extensive and requires you to go into the motor to change.
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I think I've had 14 bmw's in 4 years.
2 IX's -sold and parts
2 325i 4 dr - sold
4 318is all white - sold and parts
1 87 325is red - parts
1 89 325i vert grey - parts
1 90 325is white - keepin
1 87 325i vert -red - keepin
latest addition 1 88-325is red - parts
latest addition 1 89-325i vert - white -fixin/sold
latest addition 1 92-318i vert - blue - parts
latest addition 1 87 325is blk - parts.

latest addition as of 2013-Gold 87-325is auto! it's a keeper!
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Old 08-23-2009, 05:22 PM   #4
bimmer30
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pic

here is what i found when i opened the valve cover
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Old 08-23-2009, 05:27 PM   #5
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ummmm ok...and...? :-)
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I think I've had 14 bmw's in 4 years.
2 IX's -sold and parts
2 325i 4 dr - sold
4 318is all white - sold and parts
1 87 325is red - parts
1 89 325i vert grey - parts
1 90 325is white - keepin
1 87 325i vert -red - keepin
latest addition 1 88-325is red - parts
latest addition 1 89-325i vert - white -fixin/sold
latest addition 1 92-318i vert - blue - parts
latest addition 1 87 325is blk - parts.

latest addition as of 2013-Gold 87-325is auto! it's a keeper!
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Old 08-23-2009, 05:32 PM   #6
bimmer30
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this car won't start!
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Old 08-23-2009, 05:34 PM   #7
bimmer30
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fuel pump is brand new and working i can hear it run when on position and i checked the lines.. already checked and ok
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Old 08-23-2009, 05:34 PM   #8
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Cranks cranks and cranksargharghargh
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Old 08-23-2009, 05:56 PM   #9
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check fuel pressure. disconnect line at the fuel rail to see if you got pressure; do you smell fuel going to the motor? check coils make sure you got spark. pull a plug and put the wire back on the plug and keep the plug close to the valve cover or someplace you can arc the spark plug to check for ign spark. Don't put your hand on the plug, you'll get a nice shock. especially if the car turns over..lol.
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I think I've had 14 bmw's in 4 years.
2 IX's -sold and parts
2 325i 4 dr - sold
4 318is all white - sold and parts
1 87 325is red - parts
1 89 325i vert grey - parts
1 90 325is white - keepin
1 87 325i vert -red - keepin
latest addition 1 88-325is red - parts
latest addition 1 89-325i vert - white -fixin/sold
latest addition 1 92-318i vert - blue - parts
latest addition 1 87 325is blk - parts.

latest addition as of 2013-Gold 87-325is auto! it's a keeper!
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Old 08-23-2009, 09:00 PM   #10
E30M42cab
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Check your grounds too... Crank position sensor? Throttle position sensor...
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Grow up and move on.
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Old 08-23-2009, 09:16 PM   #11
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i got it working thanks for the advice
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Old 08-23-2009, 10:13 PM   #12
E30M42cab
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and how?
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Old 08-24-2009, 01:31 AM   #13
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this thread is full of fail
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Old 08-24-2009, 08:05 PM   #14
e30jones
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hey bimmer30, post what the solution was. Do you know how annoying it is when you have a problem, search, find a thread with the exact same symptoms, scroll to the bottom for a possible solution, and get a "thanks, fixed it", but have no idea how....
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Old 08-29-2009, 12:37 AM   #15
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it was fuel pump connectors the connectors wiggle out sometimes thus need to re connect
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