5.7 EFI running hotter on starboard exhaust

[alldodge]

Closer to a 180* stat

 

[Tunabass]

New one is in but now I wished I tested them in the same pot.
Regardless, would that cause one side to be 30-40 degrees hotter just because of the thermostat?

 

[alldodge]

On a hose most all are 30 to 40 hotter
In the water a bit less but still hotter
Cruising, should be closer to the same

As mentioned, they should not be able to burn your hand, but also may not be able to keep it there

 

[Lou C]

Even in the water, the water flow out of the thermostat housing is never going to be equal due to the forces in the cooling system. Mine has always been hotter on the starboard side. Not Merc but an OMC/Volvo set up.

 

[Tunabass]

Mine seem to be opposite. On the house both sides run fine and thermostat acts normal. In the water even in neutral it climbs to 160 and stays or climbs to 180 before falling to 160. Normal is 120-160 historical for this engine.

 

[Tunabass]

Back in the water. At 1500 RPM she’s holding steady at 160. No fluctuation between 220-180. Will see what speed does.

 

[Tunabass]

Cruising at 3200. Temp never budges from 160. Both manifolds within 10 degrees of each other.