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Post by damin69 on Jun 23, 2014 5:52:04 GMT -6
Ok so I have been battling cooling issues ever since I had to replace the Crankshaft. So a week ago I decided to pull the top end back off and check it over. What I noticed is that the head gasket covers about half of the 2 main water ports. I put in the replacement and noticed it does the same thing. And of course same issue after about 5 miles running at 55 mph cruising speed it wants to climb above 195 in temp. Slow back down to 45 and can cruise all day at around 170.
So my question is. should I do a bit of port modification and bevel out the head and cylinder ports so that they allow more water through or should I try and modify the head gasket? I noticed this with 2 different gaskets not just 1, and the make of the gasket were different also. I am leaning more twards the head and cylinder port modification.
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Post by richardthescooter3 on Jun 23, 2014 9:26:32 GMT -6
Maybe you have a clog hose somewhere  |
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Post by damin69 on Jun 23, 2014 10:04:43 GMT -6
I have had every water line off this whole system. Up until I had to rebuild the Whole motor for the bad crank bearing this scooter never had a cooling issue. I have a whole thread here on all the cooling modifications I have done to this thing since then. None of that has helped. My last resort was last week pulling the head and doing a new head gasket. That is when I noticed that the head gaskets did not line up with the water ports and looked to be cutting off about 50% of the water flow. I will have to look back threw all the pictures I took when I tore down the motor to rebuild it to see if the original gasket did the same thing.
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Post by richardthescooter3 on Jun 23, 2014 10:13:00 GMT -6
hopefully you find a way to modified that gasket and so your back on the road again.
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Post by alleyoop on Jun 23, 2014 10:17:55 GMT -6
Just modify the head gasket and fill it in with High Temp Atv and be done.
Alleyoop
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Post by damin69 on Jun 27, 2014 21:03:44 GMT -6
Ok After I took it back apart yesterday the Gasket lined up PERFECT with the cylinder ports but not with the Head. So modifying the Gasket was not an option the gasket was half blocked off by head. So I took my dremel with carbide cutter and opened up the water ports on the head so that there would be nice water flow strait through from the cylinder ports all they way threw the head. Put it all back together and we went on about a 40 mile ride tonight. Was about 82 degrees out and we were able to run flat out at around 57 mph for about 18 miles it stayted below 178. On the second half of trip 12 mile section it came up to 197 and the last section twisty road along the River stayed below 190. This is by far the best results we have had in over a year.
For over a year we would only be able to run at about 57 for about 8 miles and it would climb up to about 220 we would have to run 40 mph for 15 miles to get it back down to a 180 ish range then maybe 3-5 miles at 55 then slow to 40. If we ran back roads we where we could just run 45 all the time we could keep the temps around 185 all day.
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Post by alleyoop on Jun 27, 2014 21:41:44 GMT -6
GREAT, was this with the fan on or off?
Alleyoop
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Post by damin69 on Jun 27, 2014 21:58:27 GMT -6
Fan on of course...... Still hate where they have the Radiator on the Jonway behind the Gas Tank sucks.
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Post by alleyoop on Jun 27, 2014 22:36:44 GMT -6
Yea behind the gas tank not much air gets to the radiator at all. If it was in front you would not need the fan as your moving at all.
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Post by ellpee on Jun 28, 2014 6:50:26 GMT -6
That's not the case with my Roketa, fan is at the very front other than a plastic protective shroud, but I'm wondering if one could fabricate a sort of "air scoop" for the Jonway that would direct air to the radiator when on the road. Sort of like those scoops you see on the hood of the old Camaros and Firebirds, except this one would have to mount underneath the scooter. Not something I'd be capable of doing myself, but somebody who knows how to work with plastic or fiberglass might be able to do it.
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Post by robertban on Jun 30, 2014 19:13:13 GMT -6
not for sure if this helps or not but when I changed out the fluid in my radiator my temp gauge would top out every time my brother was down one day why this was happening and he was telling that I might have an airlock I really didn't know what he was talking about so he had me to loosen the radiator hose going to the scooters water pump (Wear Gloves) when the engine heated up thermostat open he had me to pull off the loosen (Damn HOT hose) from the radiator to let the water out and the put the hose back on with the engine still running after a while my temp gauge went down to just above the 1/2 mark and it will still get to that temp today before my fan kicks on
I would like to know what the normal temp degree should be and can you check with an old digital cooking thermometer or some way to get a good reading
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Post by damin69 on Jun 30, 2014 19:42:42 GMT -6
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..BAD TO THE BONE..
