Oil Cooler - Mercruiser 8.1S HO Horizon

[mfiglak]

Hello all! I have a 2006 Sea Ray Sundancer 390 DA. The oil pressure on my port motor has been running at 34 psi as opposed to 55 psi on my starboard. After doing some preliminary troubleshooting, I'm of the belief that I have a bad oil cooler. I'm thinking of changing it myself. Does anyone know how difficult of a task this is?

Any insight would be much appreciated.

Thank you!

 

[Thornton69]

Accessibility to it and it's location in the raw water system will be the determining factor as am guessing you are aware.
Curious what brought you to believe that the oil cooler would be responsible for a 40% drop in oil pressure?
Temp? Water in oil?

 

[btyman11]

I did it on my 8.1s about a year and a half ago when I changed my manifolds. It was fairly easy but again i had the exhaust off. If you were to do it with the exhaust off the hardest part may be access. Otherwise the hose clamps and oil connections were easy.