Applying 574

[OldTee]

With winter upon on us it may be necessary to apply Loctite 574 to a very cold engine. IE temps below 20F or so. The spec gives cure times for it at 22C or 60F but doesn't prohibit usefulness below those temps. It may not be possible to raise the temp of the engine in the garage much (IE lamps over night perhaps) and bringing the 574 inside, besides waiting for late spring, how much of a chance are you taking by applying to a cold cam tower?

Should you use a thicker application, or thinner to a cold engine?

[Dynamohum]

Not to steal your post or anything. I'm facing the same problem of having the case warm enough to apply the sealer. I will watch your post for possible solutions.

My best option is to bring it in to basement just for the bottom end assembly and find friends to help carry it out later.

Good luck, Paul

[euro911sc]

Bring the case, the 574, and the main bearings in the house overnight. When you have everything ready to go in the shop the next day, bring the case out and put it on the stand. Put the thing together. This assumes pre-assy of crank & rods. Its how I would do it. Drying time... that will be longer for sure.

Enjoy!

-Michael

[1982911SCTarga]

It sounds like he's assembling the heads to the cam towers. I did it that in my basement last winter (I used Threebond, though). It's not that big a deal to then carry the bank-of-three-plus-a-cam-tower unit to the garage or wherever it needs to be for longblock assembly.

Brian

[OldTee]

??? Seems risky to assemble the heads to the cam tower then the whole thing to the cylinders. There is a little movement of the heads to adjust to the cam tower to make sure the cams don't bind when torqued. It might be possible but hardly ideal unless they came off that way.

[OldTee]

Originally Posted by OldTee

With winter upon on us it may be necessary to apply Loctite 574 to a very cold engine. IE temps below 20F or so. The spec gives cure times for it at 22C or 60F but doesn't prohibit usefulness below those temps. It may not be possible to raise the temp of the engine in the garage much (IE lamps over night perhaps) and bringing the 574 inside, besides waiting for late spring, how much of a chance are you taking by applying to a cold cam tower?

Should you use a thicker application, or thinner to a cold engine?

Responding to my own post??!!! Not polite, but,

What I am going to do is bring the parts inside overnight (or for a few days), then prestage the whole process, then attach one set of heads, do a pretorque (per Dempsey), then take the cam tower out, add the 574, assemble per the book. The next day I'll do the other side. This way the engine never leaves the stand.

[euro911sc]

Naw, some guys put the heads and cam tower together 1st... apparently it doesn't really matter ... still, I did mine the old fashioned way...

Sounds like you have a good plan

-Michael

[Flat6pac]

If you install the heads on the cylinders then add the cam carriers you have 18 holes to line up from three different directions.
Looking at engine line production pictures at Stuttgart in the first 25 years, the heads, cams, rockers, etc were preassembled and probably with the valve lash set too.
Sub-assemblies are definitely easier to handle than trying to add pieces to the whole and feeder lines keep people from working on top of each other
Bruce