| Author |
Message |
    
JB
| | Posted on Friday, August 09, 2002 - 12:26 pm: | 
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Please explain the effects on the 3.9 engine when a truck runs without a thermostat. Seems like it stays in closed loop mode and rich start mix and is naturally slower to warm but does it eventually warm-up enough to go to regular mix with o2 readings adjusting it ? Does this rich running cause horrible carbon build-up or affect any other systems ?
My radiator was rebuilt before I bought the truck and I have never messed with it, I just found out why the temp needle never goes above 45% - they left out the thermostat... I hate to think what replacing it will reveal.luckily it has only seen one cold winter in Alabama Any advice on what this has done to my engine is appreciated.. I am searching the archives now but don't remember this topic in recent past. Thanks guys |
perroneford
| | Posted on Friday, August 09, 2002 - 01:19 pm: |
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I don't think you'll find anything wrong. The temperature of combustion in the chambers hasn't changed at all, and even with the thermostat in place, it only takes 2 minutes or less for the thermostat to open. Pull a spark plug and see what it looks like. If its all carbon fouled, then replace them all.
And don't judge your cooling by the stupid gauge. I've not seen one that was accurate yet. I'd bet good money that your engine is doing just fine.
-P |
derangedrover
| | Posted on Saturday, August 10, 2002 - 02:38 am: |
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rover cooling systems are not very good to start with, removing the thermostat will cause cavitation problems and possible damage as a result not to mention overcooling of the front cylinders and inadequate flow around the rear of the engine which can also lead to blown head gaskets. Id pull the pump and have a look for cavitation damage while your putting a thermostat in.
Cheers
Daryl |
Kyle
| | Posted on Saturday, August 10, 2002 - 08:29 am: |
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Hmmm , I have been running a 3.9 for nearly two years now I guess with just a restrictor ring.. Its been fine.
Kyle |
derangedrover
| | Posted on Saturday, August 10, 2002 - 09:06 am: |
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a restrictor is not the same scenario as NO thermostat since it maintains some flow in the bypass circuit and to the back of the motor...
Daryl |
Rob Davison (Pokerob)
| | Posted on Saturday, August 10, 2002 - 01:41 pm: |
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kyle,
no comment
rd |
Kyle
| | Posted on Saturday, August 10, 2002 - 09:15 pm: |
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Did I meantion my bypass is blocked off as well... 
Kyle
Rob , no coolant is a little different I think.. |
derangedrover
| | Posted on Saturday, August 10, 2002 - 09:31 pm: |
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Kyle,
why dont you give the whole story all at once instead of alluding mysteriously to what you have done, maybe then the guy whos looking for some help will have some information to use instead of a series of incrypted posts?
Daryl |
Kyle
| | Posted on Saturday, August 10, 2002 - 10:20 pm: |
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WEll its not encrypted and not complicated. T stats are flaming hunks of shit. Your entire vehicilar well being is riding on a 5 cent piece of tin. So I just knock the centers out and forget about it. As far as the bypass circut. Well that cycles water through the heater core on these I believe ??? Atleast it apeared that way. That pissed me off as well and got blocked. Trucks cools fine , actually runs about a needle (On the guage) cooler then it did before. Now if the head gaskets werent leaking all my good stuff out every few months or so I would be on good shape..
Kyle |
derangedrover
| | Posted on Sunday, August 11, 2002 - 12:39 am: |
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sounds scientific... you should bind up the spring in the rad cap too, that will stop one pesky leak...
Daryl |
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