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How to change engine coolant in 2004 chevy silverado 3500 (6.6L turbocharged duramax diesel)?

chevy diesel
Cody asked:


It has a pressurized reservoir, it does not have a cap on the radiator? any help would be appreciated

Thanks
there is a drain valve on the bottom of the radiator, but my question is how do i refill the radiator since there is only a pressurized reservoir and no cap on the radiator?

This entry was posted on Saturday, November 14th, 2009 at 11:23 am and is filed under Chevy Diesel. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

4 Responses to “How to change engine coolant in 2004 chevy silverado 3500 (6.6L turbocharged duramax diesel)?”

  1. open the valve kok on the bottom corner of the radiator, it screws in to drain and out to close.

  2. If there is not a petcock on the bottom of the radiator you will have to pull the lower radiator hose off. You have to be careful removing the hose and not force anything. When refilling the cooling system you have to bleed any air from the system. This can be tricky and should be performed by a mechanic that knows what he’s doing or considerable engine damage can occur from overheating.

  3. Go to dieselplace.com and surch the forum for ANYTHING U want to know about your truck. I did it according to instructions on the fourm and It worked out O.K.

  4. The system is filled via the reservoir. There is a small 12mm bleed bolt in the top of the thermostat housing (which is right behind the oil fill tube) that must be removed before you start filling the reservoir. Once your coolant starts coming out of this hole, reinstall the bolt. Then continue filling the reservoir to the full mark. Leave the cap off, start the engine, and fill back up to mark. Put cap on and drive it until it gets to operating temperature, then recheck level and fill to mark.

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