my fix to overheating tractor

[benski]

Motoman;
I'll offer the following experiment.

I'll take any of my running riding mowers, run them on the same flat oval (without mower blade engaged) for twenty minutes with conventional 30 wt. oil (Chevron 30 wt.), and then change out the conventional oil and install some Amsoil ASE synthetic. Temperatures will be recorded with an infrared thermometer at the same location on the engine, at the same distance away for the measuring device.:smile: I can't afford an ASTME spec test, but I'll do my best to take repeatable measurements.

 

[benski]

With regards to post #51;

EXACTLY my point. The temperature should indeed drop.:wink::biggrin:

 

[motoman]

Motoman;
I'll offer the following experiment.

I'll take any of my running riding mowers, run them on the same flat oval (without mower blade engaged) for twenty minutes with conventional 30 wt. oil (Chevron 30 wt.), and then change out the conventional oil and install some Amsoil ASE synthetic. Temperatures will be recorded with an infrared thermometer at the same location on the engine, at the same distance away for the measuring device.:smile: I can't afford an ASTME spec test, but I'll do my best to take repeatable measurements.

benski this will be good and almost beyond the call of duty (how much Amsoil stock do you own? :smile: Motoman

 

[motoman]

motoman,
betsy-tom (betsy-tom)'s Photos | SmugMug

You have to go all the way down to the bottom and look for the 'Cub Cadet' place, an awful lot of pictures showing a new GT2000. I think the temp pics are on the last or second to last page; this Cub is one nice tractor, .....

But man do you have to feel sorry for the people who bought that motorhome

Robert, Buyer beware I guess. I couldn't find the Cadet Motoman

 

[Black Bart]

I have a friend that works at the local TSC store and he was telling me that the Cub Cadet was a real POS so last week I stopped their to see him and I was going to take a look at one.

When I tried to raise the hood it twisted and looked like it was distorted so bad it would not even come back where it belonged so I gently lowered the hood and walked away.

Cheapest built thing I ever saw much worse then the old MTD were .:thumbdown:

 

[Black Bart]

With regards to post #51;

EXACTLY my point. The temperature should indeed drop.:wink::biggrin:

SHOULD is the operative word here but in Motorman's case it did not drop much.
I believe that is because he is just recirculating the hot air under the hood.

Look at the coolers installed on cars and trucks they are behind the grill where they get a lot of fresh air forced through them.
About the only way that setup will help is if he takes the hood off.

 

[reddragon]

motoman,
betsy-tom (betsy-tom)'s Photos | SmugMug

You have to go all the way down to the bottom and look for the 'Cub Cadet' place, an awful lot of pictures showing a new GT2000. I think the temp pics are on the last or second to last page; this Cub is one nice tractor, .....

But man do you have to feel sorry for the people who bought that motorhome

those temp readings are interesting.....i wonder where they got those immersion readings?....would like to see that

 

[motoman]

Two thou interference fit is not much, but keep in mind that that the compression is transmitted through and a tighter fit could make the valve clearance to small causing undue friction there.

I think I would use one of the Lock-tights available to keep the guide in place. The do some good stuff over there. That seems like it would be a cheaper bit of prevention than the o-rings.

Chev, As you said guide bore closure after pressing into .002" inerference fit. is expected to be .005-.001" per several sites. Regarding upward movement of guide. An aircraft site is very good. Stuck valves cause all kinds of valve train problems including mis located pushrods. ( I'm holding back my story on the swallowed pushrod ) Stuck valves cause misfire. The airacraft engine guys call it morning sickness and do not fly until fixed. My intek used to miss a lot before I cooled it. I also hear my neighbor's Kohler missing a lot. One site also talked about tight valve guide seals starving oil. On the other hand excess oil in worn guides causes coke buidup and can stick valves. I wonder if an intermittent sticking valve help push the guide? Try tpub.com and avweb.com if bored sometime. Motoman

 

[motoman]

SHOULD is the operative word here but in Motorman's case it did not drop much.
I believe that is because he is just recirculating the hot air under the hood.

Look at the coolers installed on cars and trucks they are behind the grill where they get a lot of fresh air forced through them.
About the only way that setup will help is if he takes the hood off.

Bart, When the hood is raised, fan run for 5 min, the temp drops 70-80degrees F. I have not let it run on like that to see how low it goes. Once the shrouding and fan mount is improved I'll have to add a thermostat to bring it up to temp. ( much drop) Motoman

 

[robert]

reddragon, it appears that he is using a 'bead' type thermo couple on the Fluke (I have the same instrument-rather I have the same model instrument), and from the pics it would be very easy to insert the tcouple into either the hydro/engine oil dipstick tube ?? If this was the protocol, I would have a very high degree of confidence in the displayed data.
Mine is in the van somewhere, I will measure the length of the thermocouple-I should know the length-gotta be at least 18".

Is your thought the displayed temps are low, high or about right?