finally fired up but . . . .

[rdub420]

well i finally got my 350 fired up after being rebuilt - it ran great and sounded like a real beast - we were breaking in the cam and she got hot (220 deg) was running 180-190 - my temp sender is fairly close 2 the headers and i'm not sure if that would throw it off as the headers were hot - i have a new aluminim high flow water pump and a new stock v8 replacement size but aluminum core radiator and new 160 deg thermostat

 

[82355supreme]

Don't worry about the 220*, unless you had pure water in it. :shock: Then I'd worry. Why don't you have the temp sensor in the intake near the thermostat?? That would give you the most accurate reading of water temp. It's the last place the water is before it heads to the radiator for cooling.

 

[megaladon6]

a lot of GM's run at 220 normally so you didn't harm anything as long as you had a pressure cap and it wasn't pure water. break in is pretty brutal on the engine and high temps are pretty normal. i had both my radiator (electric) fans goind and 2 high speed blowers aimed at the heads and still went over 200*. the car never goes over 170 no matter what i do now.

 

[twisted]

I like additional gauges I have 3 temp gauges on mine left head,right head, and water outlet. my head temps always seem to read 10 -20 degrees hotter than at the water outlet. some say its over kill on gauges but I like to know what is going on. the 220 as I recall seems about right for a head temp reading if you pull from the water outlet you will see it drop in temp readings on the gauge.

 

[rdub420]

thanks for the advice! will have one more g body on the road soon

 

[beeterolds]

It got that hot for 2 reasons... you didnt have an extra fan in front of the car (plug in box fan or window fan) or you didnt burp all the air bubbles out of the cooling system so the sensor is registering super hot steam not fluid..

im glad its running!

 

[rdub420]

no i did not have a fan in front - i think it had some air in it too i moved the temp sender up by the thermostat and fired it up to do some tuning and she stayed steady at 165 - 170 - i have a 180 deg thermostat that i'm gonna drop in also

 

[bulldog_m_c]

thermostat

I was told at the machine shop not to run a thermostat during the break in period

 

[megaladon6]

you should have something in there because there is a bypass built into the block and intake. w/out a t-stat the flow will get screwed up and you'll get hot spots. you can rig the t-stat (you'll need a new one afterwards) so that it's stuck open, or drill holes through it so it always flows.
or you need to block off the bypass.