Nathan, The only one I normally replace is the vacuum switch because of moving parts that are 25+ years old and the movement is inside is governed by coolant. Correct on the sensors. I don't think I have ever seen a bad one. But, I do take them out B4 U take the coolant pipe loose because they are so hard to get loose, then clean the probe end use some Teflon tape and replace them. John Hervey www.specialtauto.com -----Original Message----- From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx] On Behalf Of Nathan Sobieralski Sent: Monday, November 13, 2006 10:19 PM To: dmcnews@xxxxxxxxxxxxxxx Subject: [DML] Sensors under manifold Hello all, Since the intake is off my car and I have easy access to the valley of death I was wondering how likely it is that any of the sensors on the internal water pipe need replacing. I have confirmed that the vacuum switch works. I have heard that the two sensors have no moving parts and don't usually fail. Has anyone out there experienced these failing? I don't want to spend money on parts that aren't broke but I also don't what to take the manifold off again for a long while! Nathan 2277 To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! ID required) <*> To change settings via email: mailto:dmcnews-digest@xxxxxxxxxxxxxxx mailto:dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/