My Pete rebuild

[Rawze]

(08-10-2018 )Nostalgic Wrote:  Slid my new injector cam and valve cam in this evening, cleaned and prepped my gears, getting ready to set the lash on my idler, and get my Loctite 609 out of the box from my order back in June and.... it's not 609, but for some reason, I ordered 680. Sonofa...

I looked up the specs, and I suppose in a crunch I could use it ..

I have some experience/history with this on industrial machinery. I also had to re-visit this question when Waterloo's truck was over here because he did the same thing and got 680 by mistake.

Your assumption or source of info is incorrect for that particular application. 609 is for fine micron, high polished, no clearance applications and 680 is for rougher steel with larger micron gaps in the fit. They are 2 quite different products. The 680 has a much higher expansion rate that is not suited for fine finish applications. The 680 will expand too much and possibly cause issues and/or the fine micron high polished surfaces to slip under separation.