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Old 24-01-2015, 17:27   #1
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Yanmar heat exchanger removal

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.
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Old 25-01-2015, 13:18   #2
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Re: Yanmar heat exchanger removal

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.
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Old 27-01-2015, 11:36   #3
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Re: Yanmar heat exchanger removal

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.
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Old 27-01-2015, 18:24   #4
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Re: Yanmar heat exchanger removal

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Originally Posted by bstreep View Post
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?
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Old 27-01-2015, 18:31   #5
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Re: Yanmar heat exchanger removal

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Sounds good, do you have a similar engine?
4JH DTE. Turbocharged 75hp, vintage 1990.
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