Engine running cold after swap

[canadianguide]

Hi guys...some of you might remember I was swapping a 91 S-10 motor into my boat to replace a blown OMC 4.3L...anyway..<br /><br />Swap seems to have been a success. BUT, the engine is running really cold on the gauge...like only 100F...why would this be?

 

[cobra 3.0]

Re: Engine running cold after swap

No thermostat?

 

[canadianguide]

Re: Engine running cold after swap

well that's what we thought..should there be a Tstat between the block and water pump or just the one inside the pump housing?

 

[Bondo]

Re: Engine running cold after swap

The Only T-stat is In the T-stat Housing............

 

[cobra 3.0]

Re: Engine running cold after swap

Test the thermostat with a cooking thermometer in water to make sure it is opening at the correct temp (mine is 160 degrees). <br /><br />Is the temp sending unit the same from the previous engine?