Mike@VAC a pm.
Mike@VAC a pm.
I'm all for preemptive trikes on maintenance, but aren't we jumping the gun here? Wouldn't a simple oil analysis be able to determine if there is signs of excessive wear on the bearings? Curious me sitting here wondering with 135k miles, never tracked or abused engine.
I have compared coated & non-coated bearings using Plasti-guage and gotten the same clearance readings. If people are telling you that it reduces the clearance, they had improperly coated/treated bearings.
I don't proclaim myself to be an expert on the subject, but I've been doing the coatings since 1992 and have never had a problem with any of the engines I've built, or supplied polymer coated parts for, in the past twenty (>20) years.
These people are the experts, and you can get quite a bit of information off their website (their website can be a bit of a challenge to navigate, but their products are just fine__I use their "shop only" lines which are solvent-based; the general public gets water-based, though the heat-shielding for piston crowns is only supplied as water-based): http://techlinecoatings.com/hi-performance/default.htm
My point is, unless you're the original owner and have been doing an oil analysis program since Day One, you really don't know the whole story of your engine. With any oil analysis program, what we watch for are the trends; a single report, unless very bad (high metals content) is virtually worthless. We want to see how the engine is wearing form one oil change to the next.
Just so you know, I have pulled two (2) samples from the same oil change several times and sent them to different labs for analysis (Titan Laboratories in Colorado, and Blackstone in Indiana) and recieved nearly idential results each time__I mean, we're talking about parts per million here, so one incremental difference either way is still "identical" in my book. I do that periodically just to keep them honest!
I offer the bearings (or any other part, for that matter) treated with polymer coatings (dry-film lubricant, thermal barrier and thermal dispersant) on a limited basis. If you can't get what you want somewhere else, contact me. You can contact me here or via my E-mail email@example.com to discuss this. My references are in the form of picture albums for each of the cars I've worked on the past seven plus (>7) years; the link is in my signature (at least 30,540 pictures at last count...)
Here's a link to an S-52 rebuild where EVERYTHING was polymer coated (Turner Motorsport is even using some of the images from this album in their online catalog__with permission): http://www.spcarsplus.com/gallery3/index.php/Tweety_Two
How about a teaser picture...?
PM price for a set of coated S54 Rod bearings please.
Randy, thanks for the explanation :handgestures-thumb:
Now, I have refrained from putting you in a guest vendor limited posting group as a courtesy to you but if this courtesy is abused in ANY way, shape, or form you will be placed in the guest vendor group.
We've gone even further in some situations, where we were looking to benchmark the lab. We would send with every sample set unused oil from the same container. So the samples would look like this:
- Unused oil
- Used oil @ oil change (taken after new oil is put in)
- Used oil @ mid-point
- Used oil @ end of service life
All 4 of the above would be sent in only with sample #s...so there was no bias from the lab techs.
Obviously these engines have an oil sample port to do this efficiently....