Alistair, When the temperature approaches freezing it is advisable to grab the appropriate tools and give all the hose clamps a turn or two as required. This can take some time as there are about 48 of them not counting the four that reside under the intake manifold. Harold is dead-on in advising using silicone hoses for the block pipe to water pump backing plate as you don't want to do that job twice in one year. A leak there has been known to cause the PVR engine block to fail over time. We've been using silicone hose there on all water pump replacements for well over twenty years and have never had to go back and re-tighten a silicone hose clamp. If you don't want to follow a yearly clamp tightening ritual then silicone hose with the correct clamps (no open slots for the worm gear) is the only way to go. Although expensive initially silicone hose will generally outlast the rest of your car! Rob Grady, P.J.Grady Inc. -----Original Message----- From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx] On Behalf Of Alistair McCann Sent: Friday, March 03, 2006 10:45 PM To: dmcnews@xxxxxxxxxxxxxxx Subject: [DML] Small Coolant Leak Hi all I have noticed that when it falls below freezing or very near to it my car drips a very small amount of coolant. I thought that I had a cracked pipe but I ran the car today for nearly an hour and then let it sit and there where no leaks at all. Now I have just come home from work and there is a small puddle of coolant under the engine. Am I right in thinking that the cold weather is shrinking the piping and causing them to leak slightly??? When the weather is above freezing there are never any leaks. Any ideas?? Alistair VIN:- PILOT 25 Belfast. 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 -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 268.1.1/273 - Release Date: 3/2/2006 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 268.1.1/273 - Release Date: 3/2/2006 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/ <*> 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/