Heater return pipe or hose, leaking intake manafold gasket.
We have had several 4.3L engines at work develop coolant leaks from the intake manifold gaskets failing.
The vortec has bigger pistons
Look at the intake manifold. A vortec engine has 8ea. All the others have 12ea.
The 2001 model of the Light-Duty Silverado 1500, had an option of four engine sizes; a 6.0L Vortec V8 engine, a 4.3L Vortec V6, a 4.8L Vortec V8 or a 5.3L Vortec V8. The Heavy-Duty 1500HD comes with three engine options, these are 6.0L Vortec V8, 8.1L Vortec V8 and a 6.6L Duramax V8
The 4.3 Vortec engine never had a carburetor.
" vortec " is a title that GM uses on some of their engines
That is a common problem with the vortec 350 engines. The intake manifold gasket starts leaking in the corners of it. That is where the water jackets are and it's only about 1/4 of an inch wide and when it starts leaking it allows engine coolant to leak into the lifter gallery and into the oil. Need to replace intake gasket as long as you no it did not freeze and crack the engine block.
A vortec 5.7 is a lt1 based engine.
will a 4.3l vortec starter fit a 305 vortec?
Need to get a pressure tester for rad. Do not pump up over 10LBS. And then look at the rear corners of the intake real close for leaks. The vortec engines are none for intakes leaking antifreeze. BE SURE TO CHECK ENGINE OIL CLOSELY FOR ANTIFREEZE
the vortec block and heads were introduced in late 1995 but actual vortec motor started coming in vehicles in 1996
No it is not even close.