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  #1  
Old 08-01-2008, 12:39 PM
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timing chain check

Hi Guys

I just replaced a injection pump. I had to turn the pump all the way to the
engine to get to idle ( at 24 degrees didnt line up but ) . Im using the car now
but slow at take off . Ialready turn up the power on the alda it helped but
still slow off the line. I have 2 300sd 1 is faster this one is slow. To check
the timing chain line the marks on the camshaft gear and cam tower and the
crankshaft should point to 0 if the chain is not stretched and If stretched the
amount the degrees off is on the crankshaft timing mark IS THIS RIGHT ???????
Thanks Greg
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  #2  
Old 08-01-2008, 01:02 PM
winmutt's Avatar
85 300D 4spd+tow+h4
 
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Location: Atl Gawga
Posts: 9,329
Quote:
Originally Posted by greg240d View Post
Hi Guys

I just replaced a injection pump. I had to turn the pump all the way to the
engine to get to idle ( at 24 degrees didnt line up but ) . Im using the car now
but slow at take off . Ialready turn up the power on the alda it helped but
still slow off the line. I have 2 300sd 1 is faster this one is slow. To check
the timing chain line the marks on the camshaft gear and cam tower and the
crankshaft should point to 0 if the chain is not stretched and If stretched the
amount the degrees off is on the crankshaft timing mark IS THIS RIGHT ???????
Thanks Greg
No, just measure it and report back. It sounds like the pump is off a tooth.
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  #3  
Old 08-01-2008, 04:30 PM
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timing chain

Thanks for the reply.
The question is how to measure the chain?

thanks Greg
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  #4  
Old 08-01-2008, 04:46 PM
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Quote:
Originally Posted by greg240d View Post
Hi Guys

I just replaced a injection pump. I had to turn the pump all the way to the
engine to get to idle ( at 24 degrees didnt line up but ) . Im using the car now
but slow at take off . Ialready turn up the power on the alda it helped but
still slow off the line. I have 2 300sd 1 is faster this one is slow. To check
the timing chain line the marks on the camshaft gear and cam tower and the
crankshaft should point to 0 if the chain is not stretched and If stretched the
amount the degrees off is on the crankshaft timing mark IS THIS RIGHT ???????
Thanks Greg
Yes, this method will give you an aproxmiate idea of your Timing Chain stretch. (How about telling us what you got when you did it.)
There is 1 complication that I can think of.
Mercedes make offset Woodruff Keys in several offsets that can be installed on the Camshaft to adjust the Camshaft Timing Gear back to a normal timing range.
If you have an engine that has 250,000 miles on it and the Timing Chain stretch is "0" the chain must have been replaced or someone has installed one of the offset Woodruff Keys (asuming it was timed correctly to begin with).
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  #5  
Old 08-01-2008, 06:23 PM
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timing chain

Thanks for the reply
Would you explain about this woodruff key and what it
does? Also how it looks and were its located when used ?
Thanks Greg
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  #6  
Old 08-01-2008, 07:32 PM
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Chain stretch... 10 degrees BTDC?

current thread explaining this
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  #7  
Old 08-03-2008, 12:46 PM
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timing chain or timing

Thanks for your reply.
If I have the injection pump as far as it can go
toward the engine[retard] to get more power or better take off power
If I retime the injection pump which way should I set the teeth before
the mark on the pump or after and how many teeth ? Its easlier to
remove the pump and reset it than checking the chain which Ill do
If this doesnt work.
Thank Greg
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  #8  
Old 08-04-2008, 01:20 AM
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I believe if you rotate the top of the IP towards the engine (pump rotated counter clockwise as viewed if you stood in front of you radiator facing your windshield) you are advancing the start of injection/timing not retarding it.
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  #9  
Old 08-04-2008, 01:43 AM
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Concerning how many teeth/degree check this thread (but for a 300SD I do not know if your IP drive gear has the same number of teeth as a pump on a 300SD would).
Diesel injector timing (3000SD)
Using the Camshaft and Camshaft Bearing tower alignment marks to check the timing chain stretch would be more useful if it was done before you removed your IP and try to compensate the IP timing by moving a few gear teeth.
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  #10  
Old 08-04-2008, 11:22 PM
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injection pump timing

Thanks for the reply
Im going to retime the pump . The car starts fine but slow take off
Looking at the pump from the back to advance the timing on the pump
should I set the teeth before the timing line on the pump or after the line ?
I want to set the pump in the middle between the block and the fender.
Right now its all the way to the engine ( advanced ) so which way should
I go with the teeth?
Thanks Greg
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  #11  
Old 08-05-2008, 02:32 AM
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It is one of those things it depends on you are viewing the IP.
When you moved you pump towards the engine the IP Camshaft inside of the IP did not move.
When the IP is out of the engine you want to move the IP Camshaft but the IP Housing will not be moving so you will grab a hold of the IP Drive Gear and rotate it (clockwise); the same direction as if you were tightening a bolt. (The flat spot where there is no teeth looks like to takes up 2 teeth but check your drive gear.) Continue clockwise past the mark for as many teeth as you figure is correct. (In the other thread they said 1 tooth = about 10 degrees measured at the Crankshaft damper.) That should advance the timing.
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