[hotwheels_231]

I took the old tpi 350 out and got a new long block. When i put it in i replaced the water pump, the timp swich and sensors and had the radiator checked out and was fine. My car runs fine and is at 195 timp at idle but as soon as you hit the gas it overheats. I had the car looked at and they could not help me and i am out fo ideas and need help fast. It is in a Z-28 Camaro

[Henry Highrise]

Check your timing. Be sure the vacumn line to the advance is unhooked and plugged when you set it.

[hotwheels_231]

The motor is on time and vics are right

[Classix_Lover]

Check out the fan clutch. Look for any leaks around it, if you find any replace it. Try and spin the fan after the motors warmed up, if it moves and is not hard to turn, replace it. When the motor is cold, it should spin relatively easily.

[hotwheels_231]

it has a elctic fan

[Slimpikins]

be sure the air dam under the radiator is still there. I have an 86 trans-am that had the same problems. as long as I wasnt mooving the car wouldn't overheat. as soon as I started moving the car would run hot. I replaced the radiator, water pump, hoses, thermostat, no-thermostat, timing, head gasket, dual electric fans. come to find out all the problem was an air-dam under the radiator was missing. after spending around $400 a 50 doller peace of plastic under the car solved all my problems.
hope the info helps
good luck.

[Classix_Lover]

Eek! My mistake, disregard last post..

[hotwheels_231]

it heats up in n when i give it gas

[edge]

Originally Posted by hotwheels_231

My car runs fine and is at 195 timp at idle but as soon as you hit the gas it overheats.

Originally Posted by hotwheels_231

it heats up in n when i give it gas

Overheats - What temperature and how soon after giving it gas? Does it shoot up, or climb steadily after giving it gas? I assume by giving it gas, you mean the car is moving and no longer at idle.

Did the old engine overheat when you gave it gas?

Ed

[hotwheels_231]

it will steadly heat up to about 240 as soon as you give it some gas

[hotwheels_231]

The old motor did not

[edge]

Originally Posted by hotwheels_231

I took the old tpi 350 out and got a new long block. When i put it in i replaced the water pump, ...

Any chance you got the wrong rotation water pump? I noticed in your first post, you say you have an 86' Camaro and that you have put an 87' TPI engine in it. If you told the parts guy you have an 86' Camaro and you are running 87' pulleys and belt, assuming you installed them with the engine, that could be your problem. IIRC, an 87' TPI engine uses a reverse rotation pump, whereas the 86' still employed a standard rotation pump.

What style of belts/pulleys are you running?

Ed

[hotwheels_231]

Im still running the 87 year pullys and i have the right water pump i checked it already

[Classix_Lover]

I know you said before that your timing is correct but what is it at?

[1931 steve]

What did your intake manifold gasket look like? The rear ports on some of the gaskets have block off plates in them, some engines may or may not need these. I would look here if all other suggestions have been investigated.

Steve