Yanmar heat exchanger removal

[Liam gwtw]

I have a yanmar 4jh3te and suspect coolant loss via the heat exchanger. Can I remove the heat exchanger at either end? At the front or belt end I am restricted and don't have enough space. So I am looking at the oil cooler end. Any thoughts much appreciated.

[sailorchic34]

You can remove it from either end. Is there any oil in the water or water in the oil. Or is there bubbles in the overflow tank. It's possible for the heat exchanger to fail. But more likely or just as likely its a head gasket issue. Or possibly a leaky hose clamp.

[bstreep]

You can remove it from either end, but you will likely have to open up both ends. You will probably need to push it from one end to the other. I used a piece of 2x2 gently tapping on the back of it. "Boil" it out, then reinstall.

[Liam gwtw]

Originally Posted by bstreep

You can remove it from either end, but you will likely have to open up both ends. You will probably need to push it from one end to the other. I used a piece of 2x2 gently tapping on the back of it. "Boil" it out, then reinstall.

Sounds good, do you have a similar engine?

[bstreep]

Originally Posted by Liam gwtw

Sounds good, do you have a similar engine?

4JH DTE. Turbocharged 75hp, vintage 1990.