Quote:
Originally Posted by KTL
I wouldn't use a hardening sealant on the pump o-rings. Use something like a small dab of sticky Curil T or silicone paste to make them stick a bit, which assists with assembly.
Regarding 574 on the outside like the case perimeter, yes it doesn't cure. I have a brush sitting on the shelf above my workbench I purposely left in a jar of pens & pencils & other misc things. The brush has been subjected to 574 for like 6 years now and still hasn't hardened. But there are places where it does cure where you wouldn't expect it to, both outside the engine and inside, and I don't think the oil washes it away. You can find sites of hardened sealant around the valleys where the cam housing meets the wet part of the heads. That sealant squeeze out stays right there near the valve springs and gets brown & hard. Also look at the underside of a cam housing where the excess squeezes out to the edges that are exposed to the atmosphere. These are the "dry" areas of the housing. The 574 hardens there too.
I once tried the brown Permatex "aviation sealant" on the cam housings and it worked well to seal and goes on nice & thin (574 is actually quite easy to over-apply here). But when the brown Permatex gets warm, any excess squeeze out runs and drips down the parts.
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come o think of it I found the same thing when I stripped down my engine. maybe it is a combination of lack of oxygen and heat that cures it then. Any how , on with the rebuild.