Why gm got away from the 5.7 vortec is beyond my understanding.
I had one in a ‘96 gmc pickup and it was bullet proof.
and the 3.8 v6 ...
Why gm got away from the 5.7 vortec is beyond my understanding.
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Yeah.... I don’t think the Vortec 5.3 in my 2007 Avalanche will ever die. Mind you, I did have to rework it to disable that stupid Active Fuel Management....
The early LS were fine.
Then came cylider de-activiation, cam phasers, direct injection and alcohol viscosity oils.
I think that was the first year of the Vortec engine. I have one in my 96 suburban. It has had zero issues. I only had to change out the radiator And all the belts, hoses and gaskets. Just had the transmission rebuilt. I use the Suburban for a snow plow. Have done for 20 years.
the original 4.8/5.3/6.0/6.2 LS engines are a fantastic replacement for the old 5.7 and other displatement block engine.
it wasn’t until they overloaded them with worthless tech like “active fuel management” that they started to go to hell. Couple that with an engine oil recomendation of thinner than water oil and less than perfect machining and you have...
The current problem.
Could not meet smog regulations, did not make near enough power for modern market conditions. Late ones were made on tired old tooling.
The LS based engines that replaced it were actually even more reliable and are the engine of choice for swaps and builds.
Not to mention replacing the iconic 283 with the dog 307....