47-55.1 Exhaust manifold temp

[nvrdone]

Here's a fun one.
I just put a new 4 row radiator in MY Ad with a 327. Just for curiosity I started checking temps with my temp gun.
At the top outlet, the temp shows 177 deg. At the thermostat housing it shows 188.
I have cast iron rams horn exhaust manifolds. At the "V" in the middle of the right manifold it shows 217 deg. On the left it shows 422 deg. Does that sound right or should I be checking something? Possible coolant flow problem ?
Thanks

[leegreen]

do you have a stuck exhaust butterfly on one side that is forcing all the exhaust through the intake manifold heat riser to the other side?

[mr48chev]

Originally Posted by leegreen

do you have a stuck exhaust butterfly on one side that is forcing all the exhaust through the intake manifold heat riser to the other side?

Good point there if the truck still has the heat riser valve in the exhaust.

You should be able to tell real quick by checking the heat of the pipe down the pipes a ways. If the left side is a lot warmer than the right side that is the issue if the right side is still hotter the right side may be running lean but that doesn't fly with most manifolds that feed two cylinders on each side.

188 on the thermostat housing or just above it should mean that you have a 180 Thermostat and life is good temp wise.

[nvrdone]

no t'stat in it yet and no heat riser in the exhaust. left side is the hottest. Both sides are individual pipes from the manifold to the muffler. I will test temp next time I go for a drive.