Hot spots on my manifold, I-6

[Amir10]

So most of the engine is within the 150-170 range, its only this one area on the upper block where it meets the exhaust manifold. Is this spot on the block where it meets the manifold way too high temperature wise, or is the exhaust temperature right at this spot expected to be higher since its right where its entering the manifold?

Another forum member mentioned it may be ok since the water jackets don't run in this area, but I'm not sure if 200+ is TOO hot for any area of the motor.

Is it normal for temperatures to be higher in this area, or am I in trouble?

So it appears this is my exact concern on my 1975 Mercruiser 165 6cly. The temp gauge on the dash is not reliable after I replaced the old temp sender on the block. So I use an IR gun to check engine temps on muffs and on lake. It seems to be in normal operating range. Around 150 to 160ish. However, around my engine block, this exact spot you describe is above 200 and it concerns me. I haven't found anything else regarding this online and it has not been directly answered here. But I would like to know if this is normal or is my manifold junk?

Engine was rebuilt in 2014 and everything replaced including manifold and impeller. Water shoots our of the exhaust bellows strongly. So this is just confusing to me.

 

[Bondo]

However, around my engine block, this exact spot you describe is above 200 and it concerns me. I haven't found anything else regarding this online and it has not been directly answered here. But I would like to know if this is normal or is my manifold junk?

Ayuh,..... Welcome Aboard,..... Now you've got yer own thread,.....

The spots yer seein' Hot, are where there's no water passages, Solid cast iron,.....
Completely normal,....

 

[achris]

Do you have the 'water flow reversing kit' fitted to the manifold?