OK to remove thermostat?

On May 14, 9:04*am, "HLS" > wrote:
> "BobJ" > wrote in message
>
> ...
>
> > *Although there are cases where no thermostat will allow the coolant to
> > run thru the radiator too fast and NOT get cooled sufficiently..
>
> With all due respect, this is a myth. *There are, on some designs, reasons
> why
> removing the thermostat may detract from cooling, but speed of flow through
> the
> radiator is definitely not valid.

it's possibly possible if under certain conditions the turbulence from
the increased flow louses up the heat transfer by causing localized
eddy currents or some such, but pretty unlikely. the often heard
argument that 'the coolant is going too fast to pick up the heat from
the metal' demonstrates the profound failure of our school system to
teach simple principles of basic physics.

"z" > wrote in message
...
On May 14, 9:04 am, "HLS" > wrote:
> "BobJ" > wrote in message
>
> ...
>
> > Although there are cases where no thermostat will allow the coolant to
> > run thru the radiator too fast and NOT get cooled sufficiently..
>
> With all due respect, this is a myth. There are, on some designs, reasons
> why
> removing the thermostat may detract from cooling, but speed of flow
> through
> the
> radiator is definitely not valid.

it's possibly possible if under certain conditions the turbulence from
the increased flow louses up the heat transfer by causing localized
eddy currents or some such, but pretty unlikely. the often heard
argument that 'the coolant is going too fast to pick up the heat from
the metal' demonstrates the profound failure of our school system to
teach simple principles of basic physics.

Yes, it is...
Turbulence can increase the heat transfer, while laminar flows can increase
the
coolant throughput. Both effects are somewhat offsetting.

But the basic premise that fluid passes through the heat exchanger too
quickly to
allow cooling is absolutely bull****..

Agree : if cylinder head & piston rings have the same co
efficient of expansion*, * will be the same, designers
make sure of this.

| > wear will increase
Only if plain mineral oil ( coarse, obsolete, too thick when
cold, become tar by 121ºC ) is used.

| > unburned gas that slips by the rings and dilutes the oil in the
| > crankcase.
Only before PCV was invented, www.aa1car.com/library/pcv.htm.
He's decades out of date.

TE Chea wrote:
> Agree : if cylinder head & piston rings have the same co
> efficient of expansion*, * will be the same, designers
> make sure of this.
>
> | > wear will increase
> Only if plain mineral oil ( coarse, obsolete, too thick when
> cold, become tar by 121ºC ) is used.
>
> | > unburned gas that slips by the rings and dilutes the oil in the
> | > crankcase.
> Only before PCV was invented, www.aa1car.com/library/pcv.htm.
> He's decades out of date.
>

No, if the engine runs too cool because of missing thermostat, increased
wear will still occur due to fuel dilution of oil because the engine's
controls will be stuck in warm up mode.

nate

--
replace "roosters" with "cox" to reply.
http://members.cox.net/njnagel

| wear will still occur due to fuel dilution of oil
Impossible, petrol is very evaporative, in summer oil will
be hot enough to evaporate off petrol, pcv will suck petrol
fume into air intake

| engine's controls will be stuck in warm up mode
Temperature sensor cannot work ?.Then what's it for ?

TE Chea wrote:
> | wear will still occur due to fuel dilution of oil
> Impossible, petrol is very evaporative, in summer oil will
> be hot enough to evaporate off petrol, pcv will suck petrol
> fume into air intake
>
> | engine's controls will be stuck in warm up mode
> Temperature sensor cannot work ?.Then what's it for ?

The temperature sensor will still be working "correctly" just telling
the computer that the engine isn't fully warmed up yet.

nate

--
replace "roosters" with "cox" to reply.
http://members.cox.net/njnagel

On May 18, 5:38 am, "TE Chea" > wrote:
> | wear will still occur due to fuel dilution of oil
> Impossible, petrol is very evaporative, in summer oil will
> be hot enough to evaporate off petrol, pcv will suck petrol
> fume into air intake
>
> | engine's controls will be stuck in warm up mode
> Temperature sensor cannot work ?.Then what's it for ?

Gasoline is not a single hydrocarbon. It has a number of constituents
of varying vapor pressure. Some components do evaporate readily, but
the heavier components of the cut do not. Nor do some of the
additives (gasoline these days is not just gasoline). What remains
may not be the best lubricant.

Don Stauffer in Minnesota wrote:
> On May 18, 5:38 am, "TE Chea" > wrote:
>
>>| wear will still occur due to fuel dilution of oil
>>Impossible, petrol is very evaporative, in summer oil will
>>be hot enough to evaporate off petrol, pcv will suck petrol
>>fume into air intake
>>
>>| engine's controls will be stuck in warm up mode
>>Temperature sensor cannot work ?.Then what's it for ?
>
>
> Gasoline is not a single hydrocarbon. It has a number of constituents
> of varying vapor pressure. Some components do evaporate readily, but
> the heavier components of the cut do not. Nor do some of the
> additives (gasoline these days is not just gasoline). What remains
> may not be the best lubricant.
>

Plus, there's more of it being injected in warm up mode- same as leaving
the choke on on a carb'd vehicle.

nate

--
replace "roosters" with "cox" to reply.
http://members.cox.net/njnagel

| What remains may not be the best lubricant.

~8x I've used a white funnel* to pour BP petrol, & left * to
dry : when dry, no residue could be seen / felt

Don Stauffer in Minnesota wrote:
> On May 18, 5:38 am, "TE Chea" > wrote:
>> | wear will still occur due to fuel dilution of oil
>> Impossible, petrol is very evaporative, in summer oil will
>> be hot enough to evaporate off petrol, pcv will suck petrol
>> fume into air intake
>>
>> | engine's controls will be stuck in warm up mode
>> Temperature sensor cannot work ?.Then what's it for ?
>
> Gasoline is not a single hydrocarbon. It has a number of constituents
> of varying vapor pressure. Some components do evaporate readily, but
> the heavier components of the cut do not. Nor do some of the
> additives (gasoline these days is not just gasoline). What remains
> may not be the best lubricant.


And what about water blow-by condensing in the crankcase? Nobody has
mentioned sludge.