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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 10-05-2015
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Thermostat Housing - Preventative Maintenance?

I've recently read about the thermostat housing leaking on the 4.0 - it looks like a big job, so I don't want to have to suffer with a breakdown and deal with this. I'd rather do this on my own terms - is it a good idea to replace the thermostat housing with a new unit, or is it pointless and just wait until it breaks?
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Old 10-06-2015
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I would just wait. Its honestly not that big of a job. I think I did mine in a half hour.
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Old 10-06-2015
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Probably a little longer than 1/2 hour but no more than 2 hours removal, replace and re-assemble.

Good description here with pictures: How To Replace the Upper and Lower Thermostat Housing on a Ford 4.0L V6 SOHC Engine

Your '06 probably only has 1 ECT sensor instead of 2, ECT sensor/sender
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Thats a great guide.
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