Oil Pump & Camshaft Gear Oiling Modification
I am going to run a high volume oil on my current slant 6 build project. Most of us know that is a taboo thing to do, because of the once rumored, now proven oil pump gear drive failures. Doug Dutra talks about a modification to get pressurized oil to the oil pump and camshaft gears in this article:
Title
I believe I have found an easier way. All it includes are two holes drilled, one tapped and one modified 5/16 allen head bolt. I have done everything here, except the allen head bolt and I will procure one maybe later on this afternoon. This mod requires a 6 bolt slant 6 oil pump. I'm unsure of anyone offers a six bolt HV oil pump anymore, and if I cannot find one, I will suffice with a new or rebuilt standard volume six bolt pump with the MP high pressure relief spring.
Here is my method.
In this picture, I am holding the small drill bit in the hole I drilled through the main oil galley into the rear pocket. This will pressurize that pocket.
Here, you see the hole I drilled through the block that I tapped to 5/16-24.
Finally, here is a 1/4 bolt in that hole for demonstrative purposes. What I am going to do is get an allen head 5/16-24 bolt, drill a hole through the head down the center of the bolt just shy of the end. Next, I will drill a hole through the side of the bolt that will be just in line with the oil pump and camshaft gears that will intersect with the center hole. Then I can direct the hole directly at the camshaft and oil pump drive gears and have pressurized oiling. The research that Dutra and company did showed that there was insufficient splash lubrication to those gears when a lot of resistance and heat from a high volume oil pump was present. This should remedy that problem.
I am going to run a high volume oil on my current slant 6 build project. Most of us know that is a taboo thing to do, because of the once rumored, now proven oil pump gear drive failures. Doug Dutra talks about a modification to get pressurized oil to the oil pump and camshaft gears in this article:
Title
I believe I have found an easier way. All it includes are two holes drilled, one tapped and one modified 5/16 allen head bolt. I have done everything here, except the allen head bolt and I will procure one maybe later on this afternoon. This mod requires a 6 bolt slant 6 oil pump. I'm unsure of anyone offers a six bolt HV oil pump anymore, and if I cannot find one, I will suffice with a new or rebuilt standard volume six bolt pump with the MP high pressure relief spring.
Here is my method.
In this picture, I am holding the small drill bit in the hole I drilled through the main oil galley into the rear pocket. This will pressurize that pocket.
Here, you see the hole I drilled through the block that I tapped to 5/16-24.
Finally, here is a 1/4 bolt in that hole for demonstrative purposes. What I am going to do is get an allen head 5/16-24 bolt, drill a hole through the head down the center of the bolt just shy of the end. Next, I will drill a hole through the side of the bolt that will be just in line with the oil pump and camshaft gears that will intersect with the center hole. Then I can direct the hole directly at the camshaft and oil pump drive gears and have pressurized oiling. The research that Dutra and company did showed that there was insufficient splash lubrication to those gears when a lot of resistance and heat from a high volume oil pump was present. This should remedy that problem.
