Hector
05-28-2004, 09:43 AM
of Bill R. sprocket installation!
Successfully installed the crankshaft sprocket on my m30. Since this was my first time in doing such a task, I did a dummy run with the old sprocket just to make sure I had a procedure in place. Here's the stuff I used.
(i) Pot
(ii) Penzoil 80W-90 gear oil
(iii) Leather cloves from K-Mart and nyopreme cloves
(iv) K-type thermocouple. Of course you can use any thermometer to read temp
(v) Temp readout
(vi) Hot Plate
Here's what was done:
(1) The dummy run consisted of heating up the gear oil in a pot to about 105 C. The pot with gear in hot oil was next to the car.
(2) With a clothes hanger, I picked up the gear and grabed it with rubber cloves inside leather cloves to slow down heat transfer to my hands. Not sure if this was necessary but I rather be safe than sorry.
(3) I immeaditely placed the gear on the crankshaft and stopped sliding it half way down the shaft because the gear had cooled pretty rapidly. I had a feeling this would happen since the gear was not hot enough. I had stopped heating the oil at 105 C because it was giving off quite a bit of bad fumes. I thought I'd give it a shot anyhow.
So I pulled the gear out again with the puller and this time I heated up the oil to about 153 C with the new gear in it, and proceeded to do steps (1) to (3) above. (By now I had a pretty good idea how fast I had to work to get the new one on successfully.) Voila! Had a smoking gun with new gear installed. Below are a couple of pics of the setup and comparisons between new and old timing chains. I had other pictures to show but they didn't turn out good.
http://www.geocities.com/frothlikn/classic_tan4
Notice the difference in thickness between the new chain and the old chain. Either new chains are now fabricated thicker than the original stock chains or the old chain is severely worn??!!
Thanks again to Bill R. and Jeff N.
Successfully installed the crankshaft sprocket on my m30. Since this was my first time in doing such a task, I did a dummy run with the old sprocket just to make sure I had a procedure in place. Here's the stuff I used.
(i) Pot
(ii) Penzoil 80W-90 gear oil
(iii) Leather cloves from K-Mart and nyopreme cloves
(iv) K-type thermocouple. Of course you can use any thermometer to read temp
(v) Temp readout
(vi) Hot Plate
Here's what was done:
(1) The dummy run consisted of heating up the gear oil in a pot to about 105 C. The pot with gear in hot oil was next to the car.
(2) With a clothes hanger, I picked up the gear and grabed it with rubber cloves inside leather cloves to slow down heat transfer to my hands. Not sure if this was necessary but I rather be safe than sorry.
(3) I immeaditely placed the gear on the crankshaft and stopped sliding it half way down the shaft because the gear had cooled pretty rapidly. I had a feeling this would happen since the gear was not hot enough. I had stopped heating the oil at 105 C because it was giving off quite a bit of bad fumes. I thought I'd give it a shot anyhow.
So I pulled the gear out again with the puller and this time I heated up the oil to about 153 C with the new gear in it, and proceeded to do steps (1) to (3) above. (By now I had a pretty good idea how fast I had to work to get the new one on successfully.) Voila! Had a smoking gun with new gear installed. Below are a couple of pics of the setup and comparisons between new and old timing chains. I had other pictures to show but they didn't turn out good.
http://www.geocities.com/frothlikn/classic_tan4
Notice the difference in thickness between the new chain and the old chain. Either new chains are now fabricated thicker than the original stock chains or the old chain is severely worn??!!
Thanks again to Bill R. and Jeff N.