HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
KD123

Ideas for heat shield for '01 YZ426

6 posts in this topic

Can anyone please suggest a simple heat shield design/material to stop heat from the header from boiling the coolant at idle? I'd like to stop along a trail for 30 seconds or so at idle without loosing coolant. I also worry about heat damage to the rubber radiator hose that's so close to the header. There's various insulation materials that could be wrapped around the header pipe, but this would look pretty tacky. I'm wondering if there are some other more clever things that others have used. Thanks.

Share this post


Link to post
Share on other sites

The coolant boils out because there is no air flowing thru the radiators. Just shut it off if you want to take a break.

Share this post


Link to post
Share on other sites

You could run the pipe out of the back of the head and it wouldn't change anything. The pipe is not the cause.

Share this post


Link to post
Share on other sites

Hi Guys, thanks for the replies. I've seen blow-by out the radiator cap within 15 seconds of starting up a cold engine. The header is within 1/4" of the bottom of the radiator, and I think that focal area of heat steams things up quickly, builds a quick spike of pressure, and blows a little fluid. Air flow of course is the trick. I just wondered if anyone knew of something that would act as a heat shield for those times when I want to stop for a minute on a trail, or work for a short while on the carb with the engine at idle.

Thanks again.

Kevin

Encinitas, CA

Share this post


Link to post
Share on other sites

Trust me on this; there is no way that a 1 1/4" pipe heated to 900 degrees and placed 1/4" from the bottom of the radiator is capable of heating roughly two quarts of water to 260 degrees in 2 minutes.

You may want to evaluate your coolant and your radiator cap.

Share this post


Link to post
Share on other sites
Trust me on this; there is no way that a 1 1/4" pipe heated to 900 degrees and placed 1/4" from the bottom of the radiator is capable of heating roughly two quarts of water to 260 degrees in 2 minutes.

You may want to evaluate your coolant and your radiator cap.

He speaks the truth. I would go and tell you a story about my rebellion against the gas company years ago. Since I endured a winter with no gas, I tried many ways to heat water rapidly. It would take an incredible source of heat to boil water that fast from such a small surface area (I ended up paying my bill and enjoying hot water showers again. Are you filling your radiator to the rim each ride? Overfilling will cause a burp that quickly. Does it do it every time or only after you fill it?

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0