engine temp issue maybe

[bonnieclyde100]

i have my coolant temp gauge sensor in the intake and the gauge read exactly 180 as per the thermostat and the comuters sensor is in the cylinder head and on tunerpro it reads between 192 and 195 is that normal or should they read the same and i need to search for a problem.can headers make a differance in what the readings are?

[lionelhutz]

I'd think it's OK. The gauge could be a little low and the heads right at the exhaust ports can be hotter than at the thermostat.

[billygraves]

...........

[bonnieclyde100]

its a 1993 chevy 350 out of a pickup truck put in a 1969 chevy truck

What engine is it? 1994 LT1? OR LS? Or?

[RobertISaar]

considering how accurate the average dash guage is, i'm much more inclined to believe what the ECM is spitting out.

[steveo]

cylinder head coolant temp is a function of both coolant temperature and combustion temperature, as the heads are a fairly direct heat sink for combustion heat.

just 'cause your coolant sensor is in coolant doesn't mean it doesn't measure the heat of what it's threaded into as well.

the intake is not a direct heat sink for combustion temperature. as such, coolant temperature in the intake is much more consistent with coolant temperature.

so these results are not suprising.

headers shouldn't make a difference, nothing bakes a sensor like tightly fit cast iron manifolds

having the ECM's temp sensor in the head is weird to me, most of the time in a factory configuration it's in the waterpump or intake or something, and your gauge sensor is in the head (not that it really matters where your gauge sensor is, it's just a gauge)

[bonnieclyde100]

cylinder head coolant temp is a function of both coolant temperature and combustion temperature, as the heads are a fairly direct heat sink for combustion heat.

just 'cause your coolant sensor is in coolant doesn't mean it doesn't measure the heat of what it's threaded into as well.

the intake is not a direct heat sink for combustion temperature. as such, coolant temperature in the intake is much more consistent with coolant temperature.

so these results are not suprising.

headers shouldn't make a difference, nothing bakes a sensor like tightly fit cast iron manifolds

having the ECM's temp sensor in the head is weird to me, most of the time in a factory configuration it's in the waterpump or intake or something, and your gauge sensor is in the head (not that it really matters where your gauge sensor is, it's just a gauge)

the factory 93 chevy has the ecm sensor in the intake and the gauge sensor is in the head. i have an edelbrock intake and the hole is a little larger than the factory intake and rthe sensor i have for the gauage fits that hole that why i have the ecm sensor in the head. i wish therewas a way to put bothe sensors in the intake.