could one of you engineering types

[CAP1]

please tell me why exactly this is necessary?



this is a heater hose assembly for a 2002 taurus.

 WHY?!  why is there a need for that mess, when for decades, having one hose go in, and one hose come out has worked perfectly? what the hell are these people smoking when they do this stuff? i mean......really? 

[ebfd11]

With the newer engines and the emissions nowadays they are required.


But actually they are trying to make you  and take it to a mechanic to install..  just my .02

[phatzo]

With the newer engines and the emissions nowadays they are required.


But actually they are trying to make you  and take it to a mechanic to install..  just my .02

 

[CAP1]

With the newer engines and the emissions nowadays they are required.


But actually they are trying to make you  and take it to a mechanic to install..  just my .02

that heater hose cannot effect emissions in any way shape or form.

and ui AM the mechanic 

[Dichotomy]

See what happens when you bash engineers and designers?   They call the guys they went to school with and BOOM you've got a headache 

[Shuffler]

Probably a poorly designed engine having pockets or sectioned cooling paths.

[SIK1]

It probably has more to do with assembly than anything else.
You must remember that auto manufacturers are in the business of building cars. They don't really care about the poor shmuck that has to work on it.

[KgB]

Cap I've been listening your selfpraising for years. For a super awesome mechanic that you claim to be you should be embarrassed.
 It's a heater hose with the bypass.  If heater core is completely closed off then it is bypassed. It's easier for engine to spin watter pump, thus it's more efficient.
Welcome to 21 century.

[Babalonian]

please tell me why exactly this is necessary?

(Image removed from quote.)

this is a heater hose assembly for a 2002 taurus.

 WHY?!  why is there a need for that mess, when for decades, having one hose go in, and one hose come out has worked perfectly? what the hell are these people smoking when they do this stuff? i mean......really? 

This is my random first-thought guess.

I'm thinking it has to do with people complaining it takes too long for their heaters to warm up when they start their car in the morning.  Looks like they added a bypass to allow some partial quick recycling of the fluid so it gets back into engine sooner and gets warmer faster.


Edit - Now, why an in-and-out +bypass assembly requires 4 hoses (+ 8 clamps), 3 pipes, a dozen welds and other random pieces is something I can only speculate in my wildest dreams on...

[CAP1]

Cap I've been listening your selfpraising for years. For a super awesome mechanic that you claim to be you should be embarrassed.
 It's a heater hose with the bypass.  If heater core is completely closed off then it is bypassed. It's easier for engine to spin watter pump, thus it's more efficient.
Welcome to 21 century.

you've missed the point.

 what was wrong with the way bypass hoses have been for 50 years? they worked perfectly. why change? it's not as if it increased the efficiency, or made it easier to service.

[CAP1]

This is my random first-thought guess.

I'm thinking it has to do with people complain it takes too long for their heaters to warm up when they start their car in the morning.  Looks like they added a bypass to allow some partial quick recycling of the fluid so it gets back into engine sooner and gets warmer faster.

cars have almost always had a way for this.

 i just flushed a cooling system on a 2000 durango last week, that had heat in about 3 minutes........with the old style. 

[Big Rat]

The bypass hose makes it easier for sediment to build up in the heater core of these Taurus's, flush many of them every winter.  Thanks engineers .  Go to the other side of the DOHC taurus's those years and change the assembly with the Thermostat in it, almost a 200 dollar part .

 
BigRat

[DREDIOCK]

This is my random first-thought guess.

I'm thinking it has to do with people complaining it takes too long for their heaters to warm up when they start their car in the morning.  Looks like they added a bypass to allow some partial quick recycling of the fluid so it gets back into engine sooner and gets warmer faster.


Edit - Now, why an in-and-out +bypass assembly requires 4 hoses (+ 8 clamps), 3 pipes, a dozen welds and other random pieces is something I can only speculate in my wildest dreams on...

Didnt they used to use a simple thermostat for that?

[Babalonian]

cars have almost always had a way for this.

 i just flushed a cooling system on a 2000 durango last week, that had heat in about 3 minutes........with the old style. 

I never said it was a good idea now CAP, damn.      You're talking ot the pastor of the "if it ain't broke..." congregation.

[Reschke]

You know what your question should have been?

Why did people have to become engineers?

I see more engineers screw up a good basic design than they ever improve it or make it easier to work with. ESPECIALLY most mechanical engineers.