Why did my GM 454 Vortec engine stop working?

There was a lot of exhaust manifold problems in the class A motor homes with that engine and was probably due to the tight installations and heat build up. Father-in-law replaced two sets on his Bounder. Other than that, the engine performed quite well. Horse power is what you make of it.

Which is better GM 8.1 or GM 454 Vortec?

The 8.1 will run well on Reg. gas, 454’s like the middle grade,but will run on Reg. and they get about the same millage in regards to weight ratio. The 454 engines tend to have more mechanically set ignition and timing then the 8.1. Just the difference in the level of ECM control on the newer engine.

What kind of engine does a Chevy 454 have?

The Chevrolet 454-cubic-inch, or 7.4-liter, V-8 engine was a brawny gas-guzzling powerplant that should have died an ignoble death after the 1973 fuel crisis. Yet it survived to become a workhorse and father of the 8.1-liter 8100 Vortec V-8. Its uniqueness was in its versatility.

What kind of car is the Chevy Vortec 7400?

Also known as the Vortec 7400 (7.4L, Regular Production Option designation L29), Chevrolet’s Vortec 454 was a modern-day evolution of the company’s most legendary big block.

Is the GM 454 C.I.A good engine?

The GM 454 (7.4) is a great engine. The basic engine is a real workhorse. The following is just my opinion. I feel that any coach up to 34′ is just about the max for a gas engine. 37′ might be a little too much for the 454. That being said, if you drive it right it should do the job for you. You might want to take I-80 across Nebraska and Wyoming.

When to change the brake fluid on a GM 454?

Old/hydrated brake fluid boils at under 300 degrees F– new fluid around 500 degrees. Loosing your brakes in the mountains is not when to decide to change the brake fluid. BTW, our Foretravel is a 1993 with 157,000 miles. Joe, as Brett may have already said, Welcome to the Forum. The GM 454 (7.4) is a great engine.

Is the K3500 7.4 Vortec a stock Cam?

Yes it doesn’t have any cats, it does not have any O2 Sims. My weekend project is to turn some on the life, the spark plug defouler at the local auto parts store are too thin. Yes it is the stock cam.

What are the symptoms of Vortec drivability issues?

The symptoms include a very rich running condition, a rough idle only in park or neutral, and the scanner shows a more rich condition on bank 2, and upon acceleration or any application of the gas pedal my bank 1 knock sensor is retarding timing by 6-7 degrees and 3-4 degrees when cruising.