1st Generation Dodge Cummins 89-93 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps

Timing

Thread Tools
 
Search this Thread
 
  #1  
Old 02-08-2010, 09:06 PM
kieron_kohlmann's Avatar
Diesel Enthusiast
Thread Starter
Join Date: Feb 2010
Location: Wisconsin
Posts: 352
Received 31 Likes on 29 Posts
Default Timing

So ive been searching all around this site looking for how to adjust my timing. Does anyone have any pictures or diagrams or is it pretty simple?
 
  #2  
Old 02-08-2010, 09:12 PM
stillcummin's Avatar
Diesel Enthusiast
Join Date: Apr 2009
Location: Chardon,Oh(cleveland
Posts: 255
Likes: 0
Received 2 Likes on 2 Posts
Default

theres a couple ways to go about this depending on where your at.If the pump is off the motor and out of time youll need a dial indicator and attachments to measure the plunger lift.If your pump is on your motor and you just want to advance the timing heres a video
 
  #3  
Old 02-08-2010, 10:30 PM
seandonato73's Avatar
Diesel Wrench
Join Date: Oct 2009
Location: lebanon, Pa
Posts: 603
Received 9 Likes on 9 Posts
Default

umm you don't need a dial indicater for our trucks as far as i know
 
  #4  
Old 02-08-2010, 10:38 PM
pewder's Avatar
Diesel Enthusiast
Join Date: Oct 2009
Location: St George, UT
Posts: 346
Received 16 Likes on 15 Posts
Default

In the manual for the pump it shows you how to use the dial indicator to locate what would be TDC. So yes, if it is out AND out of time then you use a dial indicator.
 
  #5  
Old 02-08-2010, 10:55 PM
seandonato73's Avatar
Diesel Wrench
Join Date: Oct 2009
Location: lebanon, Pa
Posts: 603
Received 9 Likes on 9 Posts
Default

i stand corrected
 
  #6  
Old 02-08-2010, 11:08 PM
Begle1's Avatar
Diesel Bomber
Join Date: Mar 2007
Location: Capo Beach, CA
Posts: 3,910
Received 335 Likes on 247 Posts
Default

You can totally disassemble the pump into the smallest pieces available, reassemble the pump, reinstall the pump on the engine, and time it without a dial indicator. The dial indicator is only if want it at exactly 17 degrees base timing for whatever reason.
 
  #7  
Old 02-08-2010, 11:12 PM
pewder's Avatar
Diesel Enthusiast
Join Date: Oct 2009
Location: St George, UT
Posts: 346
Received 16 Likes on 15 Posts
Default

I guess we both stand corrected in a way then seandonato73.
All I know is last night I was looking in the cummins injection pump manual and is was showing how to locate TDC.
 
  #8  
Old 02-09-2010, 12:22 AM
Begle1's Avatar
Diesel Bomber
Join Date: Mar 2007
Location: Capo Beach, CA
Posts: 3,910
Received 335 Likes on 247 Posts
Default

Cummins was interested in making sure that the base timing was at exactly 17 degrees or whatever from the factory, for the sake of consistency from engine to engine, emissions, fuel economy, rated power, et cetera.

In reality, you're going to want to time the engine according to ear and performance. I imagine that Cummins put all of 0 seconds into tuning their engines before they shipped them to Dodge; we can afford to dial it in to right where we want it. Unless you're trying to meet OEM NOx specifications there's no reason to not time it several degrees advanced from stock.
 
  #9  
Old 02-09-2010, 11:04 AM
stillcummin's Avatar
Diesel Enthusiast
Join Date: Apr 2009
Location: Chardon,Oh(cleveland
Posts: 255
Likes: 0
Received 2 Likes on 2 Posts
Default

I have a 4bt in my 85 and the 4bt come with many cpls.most with different pump and different timing specs.I would want to time a precise injection "by ear".Again im not sure about different cpls on the 6bt.
 
  #10  
Old 02-09-2010, 11:56 AM
cummins_guy's Avatar
Diesel Bombers Sponsor
Join Date: Apr 2009
Posts: 474
Received 26 Likes on 22 Posts
Default

I would just time the pump to what specs say and then after the pump is on, time it to ear
 


Quick Reply: Timing



All times are GMT -5. The time now is 07:07 AM.