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| Joined: | 03-12-2005 |
| Location: | Kingman, Arizona USA |
| Posts: | 532 |
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I do have a couple of comments. First, if your radiator was filled with 'crud' then there may also be some remaining in the block, and if so this would restrict heat transfer and result in a hotter running engine. Using water wetter might let the engine run a little cooler.
Second, the JH uses a special dual-action thermostat that forces the coolant to bypass the radiator when the engine is cold. If the wrong thermostat design is used, the engine will run hot because some of the coolant gets fed back to the block and never runs through the radiator at all. From your description, this might be what's happening with your car. The attached drawing may help clarify this point.
Attachment: Coolant flow diagram.jpg (Downloaded 20 times)