Posted By: BradH
Surface corrosion on new rods & bolts - 10/10/13 06:56 PM
A couple of years ago I picked up a new set of K1 rods from a local machine shop after I left them there to be used for some mock-up work. What I hadn't realized until a LONG time after is that the shop ran them all through the parts washer before I picked them back up, but didn't appear to have re-sprayed them with any type of corrosion inhibitor. So, when I FINALLY got around to taking them back out of the box, what I found was a set of eight "new" rods that had developed surface corrosion on both the rod bodies and the ARP 2000 bolts.
What I've done since is treated a couple of the rods & bolt sets w/ an Eastwood product that's supposed to dissolve iron oxide and leave a zinc phosphate coating. Yeah, the parts definitely look darker (coated) after letting them soak in it. The rod bearing bores clean up OK, but the other parts of the bodies still have surface blemishes even where I've used a ScotchBrite pad.
The bolts are the most suspect in my mind after having done some research on how corrosion on bolts can lead to eventual failure. Although they appear to clean up OK after the dip & ScotchBrite treatment, I'm concerned that may simply be masking where the flaws are from normal visual inspection.
Given what I've described above, would you think the entire set of rods are now questionable for performance usage, or the bodies should be OK as long as I buy new bolts?
What I've done since is treated a couple of the rods & bolt sets w/ an Eastwood product that's supposed to dissolve iron oxide and leave a zinc phosphate coating. Yeah, the parts definitely look darker (coated) after letting them soak in it. The rod bearing bores clean up OK, but the other parts of the bodies still have surface blemishes even where I've used a ScotchBrite pad.
The bolts are the most suspect in my mind after having done some research on how corrosion on bolts can lead to eventual failure. Although they appear to clean up OK after the dip & ScotchBrite treatment, I'm concerned that may simply be masking where the flaws are from normal visual inspection.
Given what I've described above, would you think the entire set of rods are now questionable for performance usage, or the bodies should be OK as long as I buy new bolts?