Quote:
Originally Posted by NC-Diesel
OK. So I finally checked the timing chain stretch on the 81 240 today.
Using the 2mm method with a dial indicator it appears I have about 4 degrees. I know the car has about 160k mile son it so this does not seem realistic. I'm assuming either the chain has been replaced or there has been an offset key installed at some point. I have no service records for this vehicle and it was a rusty beater when I bought it. But I figure 4 degrees is not bad.
So I go to set the timing using the drip tube method. Set the balancer to 24 degrees BTD. Using all the available travel in the pump I can not get the spout to slow to 1 drop per second. So does this mean I will need to reset the injection pump or do I need to compensate for the 4degrees off my timing chain is? I know I'm going to have to pull the cam sprocket to check for an offset key just t get an assessment on the chain BUT in the interest of getting it to quit smoking with new rebuilt injectors will compensating for the current stretch get me in the ball park? (without having to tear off the IP?)
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I am not sure what you mean. Do you think you should have more stretch or; or do you think you should have less stretch.
In the Manual it gave a figure for a used chain after X amount of Miles. How, does your reading compare with that.
There is a chart in the Manual that has which Offset Woodruff Key to use for which amount of Degrees to correct the Camshaft Timing. If you installed the Offset Woodruff Key properly that would return some of your Fuel Injection Pump Timing back closer to normal.
However, Your comment about the Fuel Injection Pump not being able to turn further in the slots makes Me think that that someone has had the Fuel Injection Pump out before and did not install it with the Studs in the center of the Slots on the Flange.
Also have You done the Drip Timing before? I ask this because it is very easy to go rotate the IP past the tiny sweet spot.