powderpig
SILVER Star
Yesterday I pulled the front cover for the oil pump. I have had a weep for almost a month with no time to attend to it. It was not driping on the ground, but was making a mess. I hate fluid leaks of any kind. I had rebuilt this engine about 50k miles ago. I would have hoped I would have not leaks for a lot longer. When I got it apart I did notice the seal was flat (orginally a o-ring), but was less flat in a couple of places. So I looked at the cover closer and noticed that the oil ring was not sealing well in a couple of areas.
So I broke out the 220 wet/dry paper on a flat surface and started to lap the cover flat. It took a while for it to get flat again. Now I did not take any pictures as I had this all apart in the drireway (I had a customers fj40 in the garage, needing a HG on a 2f). I already had broken a #3 philips /3/8 drive driver. I earlier had rounded up the parts that the local dealer had in stock ( O-ring and front crank seal, new screws with a allen head system). All was looking good on time before I broke the driver> The local Napa had two #3 bits that could be inserted in a 5/16 scoket. This worked better then the Snapon driver that broke(maybe just plain wore out over 20 years of abuse).
Back to the cover, Laping is usually done on a lapping block, but you can use a flat surface to do this procudure. I was taught to use a figure 8 pattern to lap, this will allow for any uneven pressure on the part that is laped. Also try every so often to rotate the part in your hand or fingers. You can clean the surface first and use a sharpe to color the surface next. The first few strokes of lapping you then see the low surfaces. Continuue lapping until the sharpe color is gone.(about 20-25 min for this cover) The surface is now about as flat as you can want. Only time will tell if my weep is gone or I have another problem. Start to finish was about 3 hours on the work end of things(even running to the Napa store).
I know some sort of voodoo is working here, there has been a couple of post of oil weeps from the oil cover, now I had to do this as well. Stop with the Voodoo. later robbie
So I broke out the 220 wet/dry paper on a flat surface and started to lap the cover flat. It took a while for it to get flat again. Now I did not take any pictures as I had this all apart in the drireway (I had a customers fj40 in the garage, needing a HG on a 2f). I already had broken a #3 philips /3/8 drive driver. I earlier had rounded up the parts that the local dealer had in stock ( O-ring and front crank seal, new screws with a allen head system). All was looking good on time before I broke the driver> The local Napa had two #3 bits that could be inserted in a 5/16 scoket. This worked better then the Snapon driver that broke(maybe just plain wore out over 20 years of abuse).
Back to the cover, Laping is usually done on a lapping block, but you can use a flat surface to do this procudure. I was taught to use a figure 8 pattern to lap, this will allow for any uneven pressure on the part that is laped. Also try every so often to rotate the part in your hand or fingers. You can clean the surface first and use a sharpe to color the surface next. The first few strokes of lapping you then see the low surfaces. Continuue lapping until the sharpe color is gone.(about 20-25 min for this cover) The surface is now about as flat as you can want. Only time will tell if my weep is gone or I have another problem. Start to finish was about 3 hours on the work end of things(even running to the Napa store).
I know some sort of voodoo is working here, there has been a couple of post of oil weeps from the oil cover, now I had to do this as well. Stop with the Voodoo. later robbie
