Does anyone leave coolant bypass on for winter?

[shodazzl]

Wondering if anyone leaves it on for winter. How much harm can it really do?

 

[Slo-Sho]

I leave my TB and IAC coolant lines bypassed all year long. I can really smoke them good when it dry out and single digit temps.

 

[Yamaha V6]

Mine's still bypassed on the 89. Been a little "sticky" when it's been REALLY cold, but only for a split second.

 

[haydenm315]

Yamaha V6:
Mine's still bypassed on the 89. Been a little "sticky" when it's been REALLY cold, but only for a split second.

What are you guys talking about here? Sounds to me like you're bypassing the coolant lines through the throttle body? What are the benefits and drawbacks for doing so? I think the throttle body would get hotter and increase the temperature of the incoming air. As far as I've read, the higher temperature of air takes away from horsepower. Someone correct me if I'm wrong please.

<small>[ December 09, 2002, 05:59 PM: Message edited by: haydenm315 ]</small>

 

[Diameg]

That's it in a nutshell.

I was really surprised at the results too. I have a black powdercoated intake and with the coolant bypassed, my intake was noticably cooler than the other non-bypassed SHO's at a drag race in 85 degree weather.
Whether that helped or not, who knows, but it was definitely cooler.

 

[SHOZ123]

I leave mine bypassed all winter here in balmy Illinois and pull cold intake air though the ex-coolant passages for additional cooling.

 

[Bizzy]

After my trials and tribulations with my intake over the past few days I am seriously considering bypassing the coolant to the TB very soon. It looks liek a 5 min job, and can be put right back if it ain't all that great. I think I have to replace one of those hoses anyway.

Instead of bypassing it all together would it be possible to perhaps crimpt the hose so that maybe only 1/2 the flow is going through there. that would lower the temp, and alos still prevent the posibility of ice right? Just a thought.

 

[Machspeed]

If you dont bypass it, your transfering engine heat to the tb...so your actually heating up the air the enters the tb. Seriously? How hot can the tb get??? It doesnt produce any heat...

 

[SHOZ123]

Seriously? How hot can the TB get???

Well if the coolant going through the TB is 195F then it will get 195F. Icing is a one in a million chance that depends on very specific atmospheric conditions. IMHO

I've driven in conditions where ice would build up on the outside body surfaces where the air contact is the highest because of ice fog. Still no TB problems.

 

[Bizzy]

thats confirms it for me today. Off to home depot to get a small little hose union to joint those hoses together. I think the 3/8th's one I got for the PS fluching was $1.25. Those hoses look like 5/16th or so on my 94. its 9 degrees outside today, could be fun.

 

[Ian Macoomb]

SHOZ123:

Seriously? How hot can the TB get???

Well if the coolant going through the TB is 195F then it will get 195F. Icing is a one in a million chance that depends on very specific atmospheric conditions. IMHO

I've driven in conditions where ice would build up on the outside body surfaces where the air contact is the highest because of ice fog. Still no TB problems.

I used to get throttlebody/carb icing in my old k-cars. One was a carb'd '83 Aries and the other was a fuel injected '87 Reliant (hey leave me alone, I was a student). Anyway, it would only happen in certain conditions... it had to be around the freezing mark (usually a few degrees above) and there had to be moisture in the air. A bit of snow or slush being stirred up by cars in front would do it. It would usually happen after being on the highway for at least half an hour. The car would seem like it was flooded. It would lose power, stutter and spew lots of black smoke out the exhaust until it would finally quit. I'd have to pull over and wait a few minutes for the engine heat to melt the ice before I could start the car again.

That's something I never want to have to deal with again.

 

[olympic]

netviper:
thats confirms it for me today. Off to home depot to get a small little hose union to joint those hoses together. I think the 3/8th's one I got for the PS fluching was $1.25. Those hoses look like 5/16th or so on my 94. its 9 degrees outside today, could be fun.

You actually don't need a joiner. Just run the hose attached to the coolant outlet on the t-stat housing to the coolant inlet near the back of the front head. There should be enough length to reach.

 

[haydenm315]

FOR SHO:
If you dont bypass it, your transfering engine heat to the tb...so your actually heating up the air the enters the tb. Seriously? How hot can the tb get??? It doesnt produce any heat...

Thanks for making things clear. I understood the theory behind it, but didn't think of the warm coolant heating up the throttle body. Whenever I think of coolant I think of it as cooling stuff down and not heating it up. In the case of the throttle body the coolant is antifreeze for the tb. I just may bypass that when I get my new toys in the mail and go to work again.

<small>[ December 11, 2002, 06:33 AM: Message edited by: haydenm315 ]</small>

 

[haydenm315]

netviper:
thats confirms it for me today. Off to home depot to get a small little hose union to joint those hoses together. I think the 3/8th's one I got for the PS fluching was $1.25. Those hoses look like 5/16th or so on my 94. its 9 degrees outside today, could be fun.

Did you follow through with this yet? Any noticeable difference?