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Old 04-21-2014, 11:50 PM   #21
City: Carefree, Arizona
Country: usa
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 5,359
Originally Posted by Aquabelle View Post
Your HX shouldn't need replacing: just clean it in situ unless when removing the end-caps, the tubes appear very badly which case remove the whole thing and take to a radiator shop for cleaning and pressure testing.
I dunno Aquabelle.

Unlike an engine HX, a failure to a transmission cooler can be quickly catastrophic. Our two were just replaced ( 10 years old and in salt water all their life) with parts less than $200 for each one. On a newly acquired 15 year old used vessel and not knowing how the PO treated things, a replacement TX cooler is worth considering.

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Old 04-21-2014, 11:55 PM   #22
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City: sydney
Country: australia
Vessel Name: Aquabelle
Vessel Model: Ocean Alexander Flushdeck
Join Date: Jun 2012
Posts: 463
I agree post was about the engine HX not needing replacing. I provided a source for replacement transmission oil coolers. (Personally, I'd remove and have the trannie oil coolers cleaned and pressure-tested and if ok just continue to monitor trannie oil. If trannie oil is checked before every engine start, a change in its appearance will be noted quickly and catastrophic failure most likely avoided. But you are right to say that for the $$, it is cheap insurance if in doubt)

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Old 04-22-2014, 01:01 AM   #23
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City: Santa Cruz, CA
Country: USA
Vessel Name: Frisky
Vessel Model: 99 Nordic Tug
Join Date: May 2013
Posts: 1,083
I ended up ordering a new engine HX. Better to be safe than sorry. I wanted to order a new oils cooler as well, but i didn't get the PN off of it and it looks like there are a few different sized units for the 6BTA's. This weekend I'll change all the hoses and replace the impeller and HX if it arrives in time.
This past Saturday I was able to change the engine oil, the belts (hydraulic seen thruster) and swap out a failed float switch I. The shower sump. I also was a able to help my boy with two large mouth bass he caught off the dock while I was working. Seeing the smile on his face makes this whole endeavor worthwile.
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