golfaddicted
Veteran
Little problem guys, hope you can help... Put together an impulse nytro a couple weeks ago and having problems. It runs awesome, it idles great, it'll sit and idle for an hour and not overheat. Go for a ride and about a half hour into the ride the, temperature light comes on, but the sled doesn't act hot. It acts like it getting an air pocket in the cooling system. Is it possible that the head gasket is leaking exhaust gases into the cooling system and causing this. Also, would a leakdown test tell me if the head gasket is leaking. I'd appreciate any help, thanks guys.
snowy1
TY 4 Stroke Guru
you could have a air pocket, let it sit over night with the cap off, then fill it up. let it run with the cap off and top off as needed. what tork proceedure did you use when torking the head, tork to 20lbs back off 1/4 turn and retork to 20lbs in proper sequence, then 180 degrees in the proper sequence.
golfaddicted
Veteran
snowy1 said:
Yes, that is the torque I used. I've bled this thing so many times...it's crazy. Won't overheat till you ride it. Bought a block tester and tested the coolant for exhuast gases. No sign of gases in the coolant. It really acts like an air pocket, but I'm running out of ideas on ways to get rid of them.
Riceburner
Lifetime Member
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golfaddicted said:
Something weird. No liquid sled I have had would idle for anywhere near an hour and not overheat. You also say it does not seem hot when the light goes on.
Sensor issue?
Did you try burping it? With the cap off the coolent bottle and the front of the sled 3' or so higher than the rear and then run her until she heats up good and hot?
Sapling
Extreme
Bad t-stat?? I don't think a head gasket would do that. Are you pushing fluid out of the overflow??
powderlites
Expert
Head gasket
My bet is head gasket only blows coolant out under boost.
My bet is head gasket only blows coolant out under boost.
golfaddicted
Veteran
Re: Head gasket
Dave, that is exactly what I thought, but we used the block tester that is supposed to detect exhaust gases in the coolant and found none.
The last time we ran it, when the guy stopped, coolant blew out of the overflow. Other than that, there was no sign of it blowing out.
I know on my Apex, I torqued the head per Ted Jannetty's instructions and have not had any problems. Is there something special people are using on the Nytro.
This is not my sled, but I did do most of the install. Any more suggestions would be greatly appreciated.
powderlites said:
Dave, that is exactly what I thought, but we used the block tester that is supposed to detect exhaust gases in the coolant and found none.
The last time we ran it, when the guy stopped, coolant blew out of the overflow. Other than that, there was no sign of it blowing out.
I know on my Apex, I torqued the head per Ted Jannetty's instructions and have not had any problems. Is there something special people are using on the Nytro.
This is not my sled, but I did do most of the install. Any more suggestions would be greatly appreciated.
snowy1
TY 4 Stroke Guru
Re: Head gasket
the proceedure above is what dave suggested I use and I have ran up to 22lbs no problems. if you look at the tork wrench when you index them 180 degrees you are actually about 58-60 psi, alot more than the apex, if you over torked them you may have to replace them. did you use a stock gasket on each side of the shim a new stock single gasket with the black coating on both sides. I have heard of guys just using the shim and having problems with leakage,
golfaddicted said:
the proceedure above is what dave suggested I use and I have ran up to 22lbs no problems. if you look at the tork wrench when you index them 180 degrees you are actually about 58-60 psi, alot more than the apex, if you over torked them you may have to replace them. did you use a stock gasket on each side of the shim a new stock single gasket with the black coating on both sides. I have heard of guys just using the shim and having problems with leakage,
golfaddicted
Veteran
Re: Head gasket
Yeah, I watched the torque wrench. I noticed it was very high torque compared to the apex. We used the head shim with a stock gasket split and put on each side of the shim. Also used permatex copper spray on the bare surfaces.
snowy1 said:
Yeah, I watched the torque wrench. I noticed it was very high torque compared to the apex. We used the head shim with a stock gasket split and put on each side of the shim. Also used permatex copper spray on the bare surfaces.
snowy1
TY 4 Stroke Guru
are you having to add coolant after each ride, usaully if its pressurizing the cooling system it will blow it out the over flow.
golfaddicted
Veteran
Haven't been able to ride it. It overheats within the first 30 minutes of the ride.
What's everyone's thoughts on just retorquing the head and not puting in a new gasket? Or should we just bite the bullet and take the head off. Not that much work to retorque, except for the stupid spot they put the chain tensioner in. Thanks
What's everyone's thoughts on just retorquing the head and not puting in a new gasket? Or should we just bite the bullet and take the head off. Not that much work to retorque, except for the stupid spot they put the chain tensioner in. Thanks
Need for Speed 2
TY 4 Stroke Junkie
Pull the hood off and try the nytos are running hot need lower thermostat and more cooling, Mine sets the light after 20mins of trail riding unless hood was pulled off
golfaddicted said:
Where are you pulling coolant from to run through the turbo and where is it being pumped back into the system? Is the rad really hot to touch when the light is on, is it as hot as the engine? Does you coolent still look clean or have you got crap floating in it?
You should not have your return for your turbo coolant running into the return from the rad, if you do it is a extra loop around the rad and could cause problems.
golfaddicted
Veteran
I pulled the coolant from the oil cooler line as per impulses instructions. The coolant looks clean and has nothing floating in it. The radiator gets hot and when the engine is shut off, the coolant will actually boil out of the overflow...sometimes, but not everytime. So...how many are actually having cooling problems on the turboed nytro?
powderlites
Expert
Nytro cooling
If you have light come on and then find some powder and light goes out then pull up to cabin and stop it will boil the antifreeze out and won't suck it back in and might not have the light come on all day but still low and top have of rad is not being used.
But after getting hot a few times my sled blew out head gasket on Dyno.
If after it is cold and you start it up with a miss for few seconds it is sucking back antifreeze into motor.
We are working on new way to do turbo heads
http://www.powderlites.com
If you have light come on and then find some powder and light goes out then pull up to cabin and stop it will boil the antifreeze out and won't suck it back in and might not have the light come on all day but still low and top have of rad is not being used.
But after getting hot a few times my sled blew out head gasket on Dyno.
If after it is cold and you start it up with a miss for few seconds it is sucking back antifreeze into motor.
We are working on new way to do turbo heads
http://www.powderlites.com
