quawk
2nd Gear
Posts: 150
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Post by quawk on Jul 6, 2022 11:05:23 GMT -5
Still chasing my problem of my bike running hotter than it should. Have purchased and used an infrared thermometer. Temps seem to be pretty consistent at any of the points tested. The only other post I found about getting a replacement thermostat indicated contacting Jess. If he is the only source can I ask if he is now responding to parts requests?
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Post by wayne on Jul 6, 2022 18:33:59 GMT -5
Jess is back online and is not just the best one-stop-shop but frankly the most experienced RE5 spanner man alive.
Out of curiosity, how do the temps at the top left and right of the radiator compare to those given in the Radiator Temperature thread? At least it will give us an idea if it's a real problem vs an electrical fault.
rotaryrecycle@gmail.com
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quawk
2nd Gear
Posts: 150
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Post by quawk on Jul 7, 2022 8:48:14 GMT -5
Wayne, Have sent Jess a message about getting a thermostat and water pump shaft bearing just yesterday. Have yet to get a response. Did not warm my bike clear up to the 3/4 mark, but nearly there. Not to the point to switch the fan on. Seems like wherever I took a temp reading they were around 188F. to around 198F. The lower radiator hose seemed like it was a little cooler. Don't remember the exact reading. Will look at the post about radiator temps to compare. My temp testing may be indeterminate since it wasn't warmed up to the near red zone on the gauge. But will repeat and re-test.
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Post by wayne on Jul 7, 2022 21:49:11 GMT -5
Really sounds like this is an electrical fault in your sensor or gauge. Those temps are commensurate for a fully warmed up bike (mine was around 180F) and the centre mark on the gauge is 190F.
Fingers crossed engine is fine, just a gauge issue.
Give Jess some time, he's said he will answer all enquiries.
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quawk
2nd Gear
Posts: 150
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Post by quawk on Jul 8, 2022 7:11:42 GMT -5
I may be overlooking the obvious here but, if the thermo switch is there just to switch the fan on and off, where is the gauge getting its' input from to show the temp being sensed?
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Post by timpa136 on Jul 8, 2022 8:58:02 GMT -5
I may be overlooking the obvious here but, if the thermo switch is there just to switch the fan on and off, where is the gauge getting its' input from to show the temp being sensed? From memory, the common grey wire powers the gauge. Keep in mind the A model has a different single temperature sensor at the engine. If your fan is coming on at near the expected temperature position on the gauge and you test it is actually hot as indicated, The thermostat can be tested in water, coolant or oil, water is much neater. Check for clogging under the 3 screw upper hose outlet It sounds like a clogged radiator if all that checks is just my guess. Regards, Tim
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quawk
2nd Gear
Posts: 150
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Post by quawk on Jul 8, 2022 9:35:19 GMT -5
Tim, thanks for the response and suggestions. As I posted above, have messaged Jess about getting a thermostat and water pump shaft bearing if he has them to sell. Kinda' wanted to have them on hand before taking the housing cover off, in case my t-stat tested bad. I guess I should also inquire if he has the cover gasket also.
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Post by HGH 770N on Jul 8, 2022 10:41:18 GMT -5
Really sounds like this is an electrical fault in your sensor or gauge. Those temps are commensurate for a fully warmed up bike (mine was around 180F) and the centre mark on the gauge is 190F. Some years ago I had a heat issue so I checked temperature of radiator using Info-red thermometer. There was a difference of nearly 20c between left and right. Top and bottom. On getting the Rad re-cored the repairer found it hard to understand that there was no flow direction to circulate properly. So besides the original core being blocked and corroded the flow would take the easy route top to bottom. Another thing to check is the gap in the alloy union on the top hose. I’ve seen these blocked with gasket paste and then creating trapped air and restricting flow and cooling .
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Post by timpa136 on Jul 8, 2022 11:10:27 GMT -5
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Post by HGH 770N on Jul 8, 2022 12:51:04 GMT -5
Thanks for posting photo.
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Post by wayne on Jul 8, 2022 18:03:36 GMT -5
Really sounds like this is an electrical fault in your sensor or gauge. Those temps are commensurate for a fully warmed up bike (mine was around 180F) and the centre mark on the gauge is 190F. Some years ago I had a heat issue so I checked temperature of radiator using Info-red thermometer. There was a difference of nearly 20c between left and right. Top and bottom. I didn't test top to bottom but my post does show a 20 degree C difference left to right when the bike reached Owner's manual mandated minimum riding temp. Once fully warmed up from idling alone, the left/right difference fell to 2 degrees C and after a ride was equal both sides. I'll have a look at top bottom next riding day.
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quawk
2nd Gear
Posts: 150
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Post by quawk on Jul 31, 2022 16:10:56 GMT -5
To all those that have responded to my running hot problem, thanks for all the info and suggestions. Unfortunately, after purchasing some parts from member Jess (new thermostat, water pump shaft bushing, and water pump cover gasket) and installing, I am still at about the same place as I was before, not exactly overheating, but running very near to the 3/4 white mark on the gauge, and hot enough to switch on the fan. With the fan switched on it does not bring the temp down enough to switch off the fan. Riding today in about 82 degree F. temp, it was warm but not overly so. Never did actually climb above the 3/4 mark, but going by other riders input it seems most bikes run normally at about the mid-way mark on the gauge. When I had the WP cover off, the exposed end of the water pump shaft and impeller looked pristine, and the coolant passages looked clean and not gunked up. The slotted passage in the upper hose neck to upper housing fitting was clear also and not plugged or gunked up. At this point, I guess my next move will be to remove the radiator and take it to a nearby radiator shop and have it cleaned internally. From the looks of all the other related cooling system passages I just doubt that the radiator would be clogged, but will do so to eliminate another possibility. Still perplexed. Maybe should just ride it and quit worrying.
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