Heat reflective wrap

[ARB1977]

I’m seeing a lot of posts in different forums about adding heat reflective wrap or tape on transmission cooler lines. The purpose is to keep the exhaust heat from the cat’s away from the lines which can increase fluid temps in the transmission. Is there really any benefit from this? If so can it help with fluid temps? Even if it’s a few degrees.

 

[Vern_in_IL]

My 1998 Buick Lesabre has heat wrap between the air intake and the engine underhood ECM. Most cars batteries have insulated sleeves on them, mine was not even foil.

 

[Tomioka]

I've seen them done on fuel lines to prevent vapor lock.

 

[ekrampitzjr]

I've seen them done on fuel lines to prevent vapor lock.

The old-timers used spring clothespins for the same thing.

 

[Pew]

I've never done it to a fluid line but plenty of times around turbos and exhaust manifolds for similar reasons; to keep heat away from where it shouldn't be. Overall it does work but at the time we were unsure if the wraps were causing the trapped heat to crack the manifolds (that wouldn't be a problem for you though.)