Finished my vapor lock and starter heat soak fixes for the 454 Blazer. Insulated sections of the fuel line under the hood, wrapped a section of the RH exhaust pipe that ran close to the fuel lines and added a heat shield and 1/2” thick phenolic spacer under the carb.
The starter worked great until you tried to start the hot engine after it’s been parked for a few minutes. Then it was a nail-biter as to wether it would crank or not. Had the same problem with my 57 BelAir (383 Stroker) and my 87 Squarebody. Bought a new starter for a 99 Suburban 454 which is half the size and is a permanent magnet, gear reduction unit not much affected by heat soak. Spins that big block over like it’s nobody’s business. From my research GM started moving from the older direct drive starters to the permanent magnet gear reduction units around 1999. Good move!
Today’s stress test was successful! No vapor lock and instant starts of a hot engine parked for about 10 minutes on asphalt. Plus a beautiful day for a topless drive.
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