<div dir="ltr">Hi Fred -<div><br></div><div>I have always found that regardless of the thermostat you use, using a lower temp thermostat seems to have the car run a bit better. I use 160 in hot weather and 180 in cooler weather. Keeping the head a bit cooler helps to keep the carbs from getting overly hot... which causes air gaps to form between the throttle shafts and the carb bodies, causing rough running. If you have this problem, you need to replace the teflon bushes on your HD8s.</div><div><br></div><div>Sleeved thermostats seem to make some difference in hot weather, otherwise ultimately I don't think there's much difference, it just makes the car warm up a bit faster, or so people claim. Old style bellows thermostats fail in the closed position, so that's not really ideal.</div><div><br></div><div>Some old timers argue that the hotter a car runs, the less wear you have on the rings in the motor - my experience with a 180 deg thermostat on my BJ8 says otherwise - 80K miles after rebuild with stock 5 ring pistons - there's still not one bit of oil burned in that engine.</div><div><br></div><div>Best,</div><div><br></div><div>Alan</div><div><br></div><br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br><br>
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