Where do I go from here??

[Condor]

Okay, I have got to show my ignorance and ask. What is the twinkie?

 

It's the heat exchanger that sets in the valley between the two piston banks. Years ago one of our members decided because he didn't know what the 'H' to call it he decided it looked like a twinkie. The name stuck and it's become an official part name... At least on this board... :-)

[YamahaLarry]

It's the heat exchanger that sets in the valley between the two piston banks. Years ago one of our members decided because he didn't know what the 'H' to call it he decided it looked like a twinkie. The name stuck and it's become an official part name... At least on this board... :-)

 

Thanks! I had just figured it out while looking at the engine and came back to delete my post. But now that you've replied, I will let my ignorance remain exposed.

[Condor]

So the pumps finally off and apart. Getting that baby off was no easy chore. 'Specially the hex cap that holds the chrome tube. Getting back in there with an allen wrench was no fun. Now the fun part. I must have a half dozen drift punches to get the bearing out. Do you think I could locate just one. Lesson learned... Never loan you tools to your grandson... Off to HF this morning to buy another set. I even own a bearing puller. Couldn't find that either... Also when I finally checked the seals it looks like the oil seal had been installed backwards and just pulled out of the housing. So at this point I'm going to pick up another bearing. Might as well since I'm into it this far... Stay tuned....

[Condor]

Found a punch yesterday morning, and was able to drive the bearing and oil seal out of the housing and rebuild the pump body. No I didn't replace the bearing. After inspecting I couldn't find anything wrong with it. So it went back in. It had to come out to drive the seal housing out of the casting. Things are a lot tighter and the circular looseness is hardly noticeable, and it's a lot more solid feeling. Also able to remove all of the silicon off the cover side. I did find flakes of silicone in the passages. Hope they come out with the flush... Things are moving along. Time to get to the thermostat...

Edited July 30, 2015 by Condor

[djh3]

So what did you finally go with on the thermostat?

[Condor]

I picked up a complete thermo housing off eBay. $10 bucks...free ship. Checked the thermo and it didn't open up at near boil. So I'm going over to NAPA in the AM and pick up a 156. I haven't pulled the one already in the bike, but I'm willing to gamble for 6 bucks. I'm a little concerned about the 156 tho-. The pics on the NAPA site show one that has a double spring set up and it's taller than the OEM. However it does look like it'll fit in the housing. I'm taking it with me just to make sure....??

[Condor]

OK, so off to NAPA this morning and I'm sure glad I had the eBay thermo housing with me. So much for the NAPA 156 thermo. Pulled it out of the box and tried it in the thermo body and it was way to small to work. The radius was at least 3/16th of an inch smaller than needed to stay in one place. I can't remember where I read about the NAPA 156, but it was here on the board somewhere. Anyone have a different number. I may have to bite the bullet and buy one from Yamaha...?? I need to get this puppy back on the road... or go out and buy another one...

 

And that's what I did. After playing around with getting the thermo back into the housing and finally figuring out exactly what was wrong... the thermo is offset to one side... I popped for a new one. There is no way that an aftermarket thermo will work in the OEM housing. It has to be offset to match the relief inset. Yet another way for Yamaha to prioritize another part to just their bike... They could have designed it to take a number of aftermarkets, but no....

 

So to anyone reading this thread in the future forget about going cheap, and for those who have dropped an aftermarket thermo in there, it ain't working... And scratch the 156 Napa....

Edited August 2, 2015 by Condor

[djh3]

I think I gave you the number. I did some research one night and that was a cross number I picked up from a first gen replacement though. So the guy at

NAPA couldn't help you out? Geez, when I worked in a "real" prts house our books had listing in the back you could look up diameter, height etc and then it would show you a part # OR the old tried and true....... What have we got in this box Rocky?

So being you got the donar stat give us some dimensions and maybe we can looks ome stuff up. Worse case, if you had a flat piece of alum, could you build a filler washer /spacer to use the 156 stat?

AH HA I found it !!!!!!!http://www.stant.com/files/9314/0979/5335/2012_Passenger_Light_Truck_Catalog.pdf Look here starting page 288

[Condor]

It not so much that the specs can't be replaced, but that it's off center in the flange. As far as making an aluminum adapter to fill I don't need the extra work. I got the OEM on a price matching policy with my local dealer so it wasn't a painful as it could have been. When I have time I'll take some pics...

[djh3]

OK Yea if you can do some pics and some measurements maybe we can help someone out down the road. So whats the dealer going to let you have one for?

[Condor]

So whats the dealer going to let you have one for?

 

Their retail was $59 something, but the online retail seemed to be around $50, so.... I ended up paying $38 plus tax which got it up a little over $40.. $38 seemed to be about what all the online dealers were posting. I did find one though Ron Ayers for $31 but by the time I added shipping it cost more than my local dealer....

[utadventure]

So Jack.....is 7 of 9 back on the road?

 

Curious minds want to know.

[Condor]

Not yet Dave... But I visit her every day... :-) I'm still dipping milk shake out of the radiator neck that keeps rising to the surface. That stuff is stickier than all get out. A big ol' rusty flat screw driver gets a lot out. Thought I'd gotten it all when I flushed the radiator, but I guess not?? Didn't see much this morning. Soon....