Thanks David, I was just considering a replacement schedule for all or some of the parts I replaced starting about four years ago when my wife and I bought our DeLorean. I remember the crud on the otterstadt switch when first replaced so was curious how long it took to build up this stuff again. BTW, my no start problem after sitting for three or four days seems to have resolved itself ? Thanks for your help Mike Atkinson vin 16232 ----- Original Message ----- From: "jtrealtywebspannet" <jtrealty@xxxx> To: <dmcnews@xxxxxxxxxxxxxxx> Sent: Friday, September 13, 2002 7:44 AM Subject: [DML] Re: Overheating/rising temp since A/C Charge > The origional otterstadt switch seems to go bad sometime before it is > 20 years old. If it is leaking, origional or the fans don't seem to > come on soon enough it is time to change it. If installing a Fanzilla > it is recommended it be changed at the same time. When installing a > new otterstadt switch remove the seal, clean with a little > scotch-brite and put the seal and switch in with NO SEALER. Make sure > the clip is still there or at least use a strap-tie to hold the switch > in. If you have an early set-up with the switch on top of the pipe > modify the pipe and get the hoses to work like the later version so > there is no air bubble trapped under the switch. > If the switch is coated with crud you have much bigger problems since > the crud is probably all throughout your cooling system. Drain, flush > and refill with fresh anti-freeze if it is over 2 years old. If you > have the origional hoses and seals you have a big job replacing them > all including the water pump. > David Teitelbaum > vin 10757 > > > > --- In dmcnews@xxxx, "The Atkinson Family" <mikeatk@xxxx> wrote: > > Just curious, how often should the otterstadt switch be replaced. > > Can the sensor become coated with crude after a few years. I > > replaced mine about three or four years ago . . . [moderator snip]