In a message dated 10/27/2006 8:59:24 A.M. US Mountain Standard Time, [EMAIL PROTECTED] writes:
Question is: Can having a break in your exhause pipe about 2/3 of the way to the tailpipe (in other words, about under the rear seat, and just before the muffler) cause enough cold air (remember we have sub-zeros coming) to harm (as in "burn") the vavles? This is what I was warned about years ago when running open headers occasionally came into the picture. This is partly OT becase I'm not talking about my Mercedes, I'm talking about a gasser four-cylinder (whose make shall remain unnamed in the interest of quelling any protest). Probably, the cat converter would protect things? Brian Brian, I had heard that warning too, and think it mostly affects zoomy headers, the ones that go up. cold air falls and would not naturally flow up a hot header from below. The tortuous flow path involved would preclude any large shot of cold air from reaching the valves. I would worry more about the potential death threat of carbon monoxide exiting that hole and entering the cabin. Regards Jim Friesen Phoenix AZ 79 300SD, 264 K miles 98 ML 320, 146 K miles
