Hi all!
I have a possibly very dumb question for the hive mind, but I want to make sure I'm not missing anything. I recently bought an extremely misused (read: NEVER driven!) 2003 corvette Z06 and I'm having all the typical problems one would have from such misuse.
Anywho, I had the Harmonic balancer failure in which it was wobbling a whole lot. So, I bought a nice aftermarket one, pinned my crank, and pulled it on. It is a press fit of about .0007'', and I used Permatex Anti-seize #81343, composition shown below:
The Balancer I used is made of 1045 steel. I can only assume the crank snout is close to 1045 as I can't find that info anywhere. One side of the balancer slips into the timing cover and therefore the interface of crank to balancer is only subject to oil. The other side is covered by a GM bolt which has loctite on it and so the interface is protected from anything outside. Both interfaces are also obviously protected from anything outside because of the press fit.
My question is in regards to galvanic corrosion. Is there any way that I could cause harm using an aluminum powder anti-seize on the alloy steel? My thoughts are that 1: since there is no electrolyte present, and no way for it to enter the interface, and 2: the metals are relatively close in the galvanic series, that there is no way the anti-seize could cause a corrosion problem.
Am I missing anything?
Thanks!
I treat anti-sieze like Franks red hot sauce, put that E36 M3 on everything. Copperlube is my go to for anything electrical but have used it on fasteners, everything else gets the silver or grey stuff that probably has lead in it (very old can).
I think you're way overthinking it.
I know almost nothing of the galvanic action. But think about this: What space is the antisieze supposed to occupy in this scenario? If it is, indeed, a press fit, all of the antisieze will be displaced in the process of pressing the balancer on...right?
ClemSparks said:
I know almost nothing of the galvanic action. But think about this: What space is the antisieze supposed to occupy in this scenario? If it is, indeed, a press fit, all of the antisieze will be displaced in the process of pressing the balancer on...right?
That's a good point too, but I'm assuming the bore can't be perfectly flat. As in there's still space because the surface roughness won't be zero. But I think you're all correct - I'm just having so many minor problems that I'm starting to overthink things.
Thanks guys!
You should not have any problems unless you park in the ocean or keep it stored undriven in a high humidity climate. But many other things will give you corrosion problems long before the crank is a problem.
I would be wary of applying antiseize to a press fit unless explicitly instructed to by the OEM if using an OEM balancer or the manufacturer of the balancer if using aftermarket.
93gsxturbo said:
I would be wary of applying antiseize to a press fit unless explicitly instructed to by the OEM if using an OEM balancer or the manufacturer of the balancer if using aftermarket.
My thought as well - generally, a press fit object should not require antisieze. As far as that goes, the joining faces of the balancer and the crank are basically inside the engine anyway, so they're not in an environment where you have to worry about things rusting together.
93gsxturbo said:
I would be wary of applying antiseize to a press fit unless explicitly instructed to by the OEM if using an OEM balancer or the manufacturer of the balancer if using aftermarket.
I thought about that exact thing, but some manufacturers recommend anti-seize, and others do not. This particular balancer has no attached instructions. I figured that 1: it may come off in a few years for a cam install and I'd like to do that without scoring the crank and 2: I'm pinning the crank anyways, so 3: if it DOES spin, that means I broke the pin, which I assume is unlikely (jinx!), and it will spin radially and not axially, off the crank. I guess I'm saying is it's fixable if it does move and I can reinstall without antiseize.
