I'm hoping to add fresh insulation to my upper manifold hose (suction side) where it's a metal line that crosses the front of the cylinder head/valve cover. I've found some foam insulation tape that's suggested for temperatures up to 185 degrees F. Is that likely to be safe near this location? Obviously the line will be cool during operation, but I'm worried about the ambient temperatures near the front of the head. It looks like the original insulation was some sort of foam that's pretty thoroughly degraded - I found a little bit of it remaining buried under the cruise control servo that has turned crunchy with age.

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'85 300D - federal spec, built in late 84. 85 300D Complete AC System Rebuild

I beleive the Nashua foil tape can help here.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)

Thanks,
I am only finding foil tapes, nothing with an insulation layer. Is that what you are talking about?

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'85 300D - federal spec, built in late 84. 85 300D Complete AC System Rebuild

I used foam pipe insulation (Home Depot, I recall) in both my 300D's and has held up fine for several years. I used the better denser PN, split w/ adhesive. I added a few nylon tie wraps to help the adhesive. Don't recall if for 1/2" or 3/4" pipe. "As found", both cars had black foam stuff that had degraded and become gooey. Some might have been due to oil. My engines stay pretty clean now.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans

Use 1/2" closed cell self adhesive pipe insulation from your favorite box store... The black foam, not the gray stuff.

Alternatively, any hvac shop should have minisplit reinforced pipe insulation that has a strong protective covering.

The tapes aren't really suited for this.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Same as Bill and vstech above. I used the black foam type, from Home Depot, if I recall correctly. I think it's for one-half inch pipe. It has held up fine. I've used a few black zip ties as retainers.

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Marshall Welch
Seattle, WA
1982 300D-T

Thanks guys. Will pick up some pipe insulation

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'85 300D - federal spec, built in late 84. 85 300D Complete AC System Rebuild