Posted by 135 Fan on November 22, 2008 at 23:32:18 from (24.70.95.205):
I picked up a new thermostat to put in my 2000 Chev Silverado 2500. The thermostat did come built into the housing, which is OK. It's not attached to upper rad hose but the lower one right at the water pump. That's OK too. I just had to take the air intake tube off to get at it. You have to scrape your hand on the rad shield to get at one of the bolts on the thermostat hosing but it's not too bad. I couldn't find a drain on the rad anywhere, so I called a repair shop. No drain on those trucks because GM wants you take it to them so they can hook it up to a machine to suck the coolant out and replace it. Stupid! You have to take the lower rad hose off to drain the coolant. Stupid!! Putting the thermostat in is really simple after the coolant is drained but GM uses those spring type hose clamps and there isn't a lot of room to get at the lower rad hose to put it back on. Maybe if you have the special type of pliers? I turned it to the bottom so I could at least get it back on. Of course the floor was wet from having to take the lower rad hose off. I put everything back together and just need to fill it back up with the coolant. I somehow managed to catch most of it. I couldn't pour it directly back in to the rad, so I had to pour it into the little coolant tank. I poured it through a rag to filter it and figured it would take a little longer. Why I didn't expect is that the coolant bottle would fill up and run out the overflow faster than it would go into the block. I took the upper rad hose off to let air in. It bubbled a bit in the coolant tank at first but then nothing. It took forever and a day to get the coolant back in! I went and picked up some more anti-freeze. I bought straight Prestone anti-freeze for Dex cool. It was $17 something. The 50-50 stuff from Zerex was $13 something. I figure I got a better deal on straight anti-freeze. I managed to get some more anti-freeze and water back in but I think I still need more. Hopefully tommorow the level will have gone down so I can a little more. Why did they have to make it such a pain just to change a thermostat? I changed thermostats in older vehicles in 20 minutes. Drain the rad a bit, unbolt the housing, replace thermostat and gasket, refill the rad, let engine run with cap off to get the air out and top off rad. Now you need to have a fancy machine to do it, so it doesn't take forever. Seems backwards to me. At least I'll warm up a lot faster now. I needed to vent. Dave
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