Engine Heat Insulation

[rognvald]

What are the pros and cons of using marine insulation wrap on diesel engines? What specific engine components would benefit from this practice? Do the different engine manufacturers specify different procedures? Comments from owners who use insulation wraps on their engines will be greatly appreciated. Best, Ron

[barnakiel]

Nothing wrapped here. Seen dry exhausts wrapped though.

Why the wrap?

b.

[Chief Engineer]

The only thing that may need to be wrapped is the Exhaust

[rognvald]

Originally Posted by barnakiel

Nothing wrapped here. Seen dry exhausts wrapped though.

Why the wrap?

b.

Barnakiel, there is a consensus among some mechanics to wrap the exhaust and/or mixing elbow to lower the ambient temperature in the engine compartment when the engine is running as was mentioned by Chief Engineer. We have a well functioning Yanmar with only 1800 hours and I would like to do whatever possible to extend its life as long as possible. The practice is common in automobiles. Is there a parallel? Does the science work? Best, Ron

[barnakiel]

Originally Posted by rognvald

(...) The practice is common in automobiles. Is there a parallel? Does the science work? Best, Ron

Automobiles have wet exhausts too?

b.

[Ex-Calif]

Originally Posted by rognvald

Barnakiel, there is a consensus among some mechanics to wrap the exhaust and/or mixing elbow to lower the ambient temperature in the engine compartment when the engine is running as was mentioned by Chief Engineer. We have a well functioning Yanmar with only 1800 hours and I would like to do whatever possible to extend its life as long as possible. The practice is common in automobiles. Is there a parallel? Does the science work? Best, Ron

Mine is wrapped from the mixer to the transom. I don't know if it lowers temps or reduces noise. I do know I can't see the condition of the pipe...

There is equipment and wiring that runs in proximity of the pipe. My guess is the wrap is to protect that gear from heat.