exhaust manifold temps. is this normal?

[tobaccogrower]

due to a ticking noise under load/boost, i bought a infared digital thermoter with the lazer pointer. with an outside temp of 28* and the truck at idle, water temp at 170*. temps taken from about 15 inches away from same spot on each cylinder on the manifold. temps are as follows from rear of motor twords front:182*, 198*,187*, 180*, 175*, 177*. is it normal to see such a diffrance in temps per cylinder? temps were taken right where the exhaust manifold attaches to the head... ... . james

 

[Bodie]

Did you start it up and run this test, or drive it then read the temps?

 

[tobaccogrower]

i drove it to warm it up then took the temps about 5 minutes after i parked it.

 

[Bob4x4]

i drove it to warm it up then took the temps about 5 minutes after i parked it.

That test has no validity... ... it should be runnung preferably under a load such as a dyno.



Bob

 

[NoSeeUm]

I have two EGT's. One is stuck in the #5 and #6 common tube the other only reads the #1 tube. I can see easily 200 F lower temperature on the #1 that the #5/6 at WOT. The temperatures will settle at and be roughly equal just after coming to idle.



Jim