Ondonti
04-17-2011, 06:11 AM
I took the heads off the Duster and swapped on the bad heads from my Spirit to the Duster tonight. Looking at the valve spring retainers on the original test mechanical rocker heads, I think I know what the squeaking sounds have been...
One of the retainers has a small bit of polish all around around the high top edge of the retainer and then another one has a deep polish. I am guessing the latter is the one that is squeaking right now. I guess I did not get enough clearance on that rocker. This lines up with my feeling that it was just one valve squeaking as I could hear it crying mightily when it went over the cam lobe for the last time when turning off the engine.
This leads me to believe that I can skip doing the oiling mod and maybe make the assumption that the pinholes in the hydraulic rockers are simply to prevent overpumping the hydraulic lifters...
I think this is nice news. I did buy 2 cheap sets of drill bits that go down to 0.5mm and then some silver solder paste to fill a larger hole and then use the tiny bit to drill through solder. Oh well? Sorry to get people paranoid about this issue as it seems to be no big deal :D
This will save me a bit of a hassle. I was quite pissed tonight when right before putting the stock bad rear head onto the Duster, I realized the OEM exhaust manifold does not have gaps between the cylinders so I had to drill and hammer out a hole between cylinders 1 and 3 so the oil dipstick could pop through. It was still incredibly hard to get the cylinder head into place.
Now, do i remove the rocker and clearance it a bit more or just keep driving it until the material is completely worn away?. I would prefer #2 :P
One of the retainers has a small bit of polish all around around the high top edge of the retainer and then another one has a deep polish. I am guessing the latter is the one that is squeaking right now. I guess I did not get enough clearance on that rocker. This lines up with my feeling that it was just one valve squeaking as I could hear it crying mightily when it went over the cam lobe for the last time when turning off the engine.
This leads me to believe that I can skip doing the oiling mod and maybe make the assumption that the pinholes in the hydraulic rockers are simply to prevent overpumping the hydraulic lifters...
I think this is nice news. I did buy 2 cheap sets of drill bits that go down to 0.5mm and then some silver solder paste to fill a larger hole and then use the tiny bit to drill through solder. Oh well? Sorry to get people paranoid about this issue as it seems to be no big deal :D
This will save me a bit of a hassle. I was quite pissed tonight when right before putting the stock bad rear head onto the Duster, I realized the OEM exhaust manifold does not have gaps between the cylinders so I had to drill and hammer out a hole between cylinders 1 and 3 so the oil dipstick could pop through. It was still incredibly hard to get the cylinder head into place.
Now, do i remove the rocker and clearance it a bit more or just keep driving it until the material is completely worn away?. I would prefer #2 :P