When I first start my 89 k5 with tbi in the morning the auto choke kicks in and the truck then gradually idles down as it should as it warms. Problem is the temp rises to about 240 on the gauge as I'm driving before it drops back down to 210 where it stays for the most part. During this "start out" time it doesn't want to idle at a light, stutters as you start from a stop, and acts like there's water in the gas. I have flex-a-lite fans but they don't even phase the temp for those first few minutes when the temp is climbing. I'm worried that getting the engine this hot every day, even if just for a few seconds, will ruin my heads or engine, etc. I'm wondering if I should switch my 180 degree thermo to a 160 degree unit? It can't be good for my engine to get that hot before returning to a normal temp!?! After the day's innitial warm-up the engine runs like a top. I should mention my 5.7tbi has HP heads, headers, cam. Spent a lot and I'm worried I'm doing damage daily!