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How hard is it to change the Thermostat?
  #1  
Old 02-07-2010, 01:08 PM
DenniSM DenniSM is offline
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Default How hard is it to change the Thermostat?

Hey Guys
The last trip to NYC had me overheat and die in Chinatown. And it was only 20 degrees. But 60 blocks of stop and go traffic made the max run too hot.
I now plan to ride to Daytona from PA at the end of the month. And I am sure the bike will do fine on the trip. But running around in traffic at bikeweek will be as bad as NYC. And it will be much warmer then 20 degrees. So I am sure I will have an issue.
SO far I flushed the system and installed a manual switch for the fan. I will run it while riding in town. I am thinking about taking out or changing the thermostat. If its sticking. blowing air thru the rad will not help. So how involved is it? Do I need to remove the header and radiator? Or is there a simple trick to getting it out?
Call me lazy, but with Daytona so close I don't want to get invoved in a huge project. Thanks
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Re: How hard is it to change the Thermostat?
  #2  
Old 02-07-2010, 01:31 PM
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Buster Hymen Buster Hymen is offline
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Default Re: How hard is it to change the Thermostat?

Quote:
Originally Posted by DenniSM View Post
Hey Guys
The last trip to NYC had me overheat and die in Chinatown. And it was only 20 degrees. But 60 blocks of stop and go traffic made the max run too hot.
I now plan to ride to Daytona from PA at the end of the month. And I am sure the bike will do fine on the trip. But running around in traffic at bikeweek will be as bad as NYC. And it will be much warmer then 20 degrees. So I am sure I will have an issue.
SO far I flushed the system and installed a manual switch for the fan. I will run it while riding in town. I am thinking about taking out or changing the thermostat. If its sticking. blowing air thru the rad will not help. So how involved is it? Do I need to remove the header and radiator? Or is there a simple trick to getting it out?
Call me lazy, but with Daytona so close I don't want to get invoved in a huge project. Thanks
It's easy to get at. Just remove the right scoop (sitting on bike right side) and you will see where the thermostat goes where it meets up with the rad hose.
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Re: How hard is it to change the Thermostat?
  #3  
Old 02-07-2010, 01:43 PM
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88vmx12 88vmx12 is offline
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Default Re: How hard is it to change the Thermostat?

Well you can do several things for over heating... Change your fan blade to a muzzys brand , change out the thermal switch to a lower temp so the fan kicks on sooner, Install an fan over ride switch. Change your thermostat if it is faulty. Also check your radiator your fins might be plugged up from bugs and road grime.

Changing the thermostat , thermal switch , or installing an fan over ride switch is pretty easy. Most of your work will be done under the right side scoop.

Installing a new fan blade and checking your radiator for bugs is another thing. I would first of all check for bugs in the radiator. You can clean it yourself but it is a touchy subject. I removed mine from the bike .It becomes a messy project from the antifreeze that you will have to drain out. I layed it flat on the ground and used a high pressure washer. The problem with this is if you don't spray directly down into the radiator fins you will bend them over then you have a huge issue. This might need to be done because of the mileage on the bike or if you have a ton of bugs. Also someone might have already tried to clean the radiator and bent some of the fins over. This also could be part of your cooling issue. If this is the case you can fun down to your local parts house and get a radiator fin comb or straightener. They are not too costly.
The problem with the Vmax is its cooling issues and there are many things that could contribute to them. Always check these first: coolant level , clean radiator , water pump , thermo stat. Then you can do other mods

Others on here know more than I but I would first start there unless another member has other ideas
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Re: How hard is it to change the Thermostat?
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Old 02-07-2010, 02:23 PM
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Default Re: How hard is it to change the Thermostat?

The T-stat isn't all that hard but not just a 15 minute job. It's located down near the front lower right header right behind the waterpump elbow. You either need to take the pump off or remove the hoses and work the housing out from behind the header. It's not the problem usually anyway. As noted, a good flushing and checking of the radiator for cleanliness. You can change the sending unit easily and it is under the right scoop as was noted. But, that only lets the fan turn on sooner. If you are having problems with it overheating that bad you may have other issues.

The muzzy fan seems to work worse from our experience.
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Re: How hard is it to change the Thermostat?
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Old 02-07-2010, 03:12 PM
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Default Re: How hard is it to change the Thermostat?

Sean don't tell me the Muzzy fan works worse.... Yikes

Scooter
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Re: How hard is it to change the Thermostat?
  #6  
Old 02-08-2010, 07:30 AM
Elimax Elimax is offline
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Default Re: How hard is it to change the Thermostat?

Yup, I changed my thermostat as well...it took about a half an hour. Real easy to do. And, fan comes on earlier.

Elimax
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Re: How hard is it to change the Thermostat?
  #7  
Old 02-08-2010, 07:35 AM
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Default Re: How hard is it to change the Thermostat?

When I changed my thermostat , one of the bolts broke off & I ended up pulling the header off to drill & tap - easy jobs can turn to shite sometimes. I'm still glad I did it - bike runs right at half-way on the gauge even in mid-summer. Don't just pull the thermostst out, be sure to put a new one in.
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Re: How hard is it to change the Thermostat?
  #8  
Old 02-08-2010, 07:44 AM
DenniSM DenniSM is offline
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Default Re: How hard is it to change the Thermostat?

Ok
I will inspect the radiator. I have put around 5000 miles on the bike this winter. And the bike has never even come close to the middle of the gage. But I have been riding it in the cold and country roads. On the way home from NYC, the bike ran fine again. Just that late night ride from 48th street to chinatown in dead stop traffic made it run so hot it staled and would not start until it cooled down.
We flushed the system the other day and let it idle and and over time it went almost into the red in about 20 minutes. Almost the red. What temp should the fan kick in? It did not hit the red, but the fan did not kick in. We turned it off and flushed the sytem again. Today we will test with my override switch and see if it will keep it cool. And inspect the radiator.
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Re: How hard is it to change the Thermostat?
  #9  
Old 02-08-2010, 07:51 AM
Elimax Elimax is offline
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Default Re: How hard is it to change the Thermostat?

I live in Hell-like Phoenix, AZ. I used to live in Manhattan with my previous VMax (a 20001).

When I ride here in 108 degree heat, you know I gotta keep her cool.

These are the things I did:

1) Changed the thermostat to a model that brings fan on earlier.

2) Got the manual "fan on" switch (for "preventivemaintenance").

3) Switched back from Muzzy's fan to stock fan (in light of the research Sean mentioned.)

4) Lastly, but NOT leastly, I changed coolant to "Engine Ice." It's really popular here in Hell..I mean Arizona...with a higher boiling point.

Since I've done these mods, the bike NEVER overheats.

Good luck!
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Re: How hard is it to change the Thermostat?
  #10  
Old 02-08-2010, 10:13 AM
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Talking Re: How hard is it to change the Thermostat?

Quote:
Originally Posted by Elimax View Post
I live in Hell-like Phoenix, AZ. I used to live in Manhattan with my previous VMax (a 20001).
WOW you got a 20001?!?! Does it fly? Levitate? Does it run on lizard poo and how many times round the sun can u go on one zap?

Dennis, if your temp never went up it points at a broken thermostat - makes sure to renew it! Sound like it used to be stuck open.

Fan not coming on could be a number of things:
- first disconnect the wires at the fan switch and connect them to each other, fan should come on. If it does your temp switch needs replacing.
- if it doesn't, you'll need to check your fan fuse, and also run 12V directly to the fan connector (under left scoop and plastic cover) to make sure the fan is ok.
- if it comes on then it could be your wiring. If it doesn't you may need a new fan. It should come on automatically as the gauge reaches roughly 3/4 up to the red.
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