what just helped me find a coolant leak.

Joined
Jul 26, 2012
Messages
166
Location
beaverton OR.
Bike
2005 st 1300
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8733
so as some of u might know i got my st from my dad, (supersabre) when i got the bike he told me that it had a slight coolant leak and after it getting worse now that i have the bike up here in Oregon i decided to dig in and see what i can find about where its leaking,20130805_191331.jpg so after pulling tank, air box and all plastics and radiator i was able to find a leak on 2 pipes one was a smaller pipe going 20130805_192828.jpgfrom front of motor to the oil cooler and second was on the right side larger hose that goes from thermo housing to head,20130805_202938.jpg



so after replacing both pipes and refilling the system i ran the motor and didn't see any more leaks, put it all back together and got it ready for me to ride into work, stopped to get gas in as i was on empty and got going again, well when i got to work i noticed i had a dripping from under the bike, :22yikes:

i had to pull the gas out and this time i just took off the tank, air box, right side Tupperware just with pulling back the rubber i couldn't see any leaks, i found one clamp that was a little loose but didn't look like it was leaking, and every time i started it with in a few mins it would start leaking , after still not being able to find my leak with the throttle body's on and such a small area,20130805_192132.jpg so i decided to pull them off to see if i could find the issue. after pulling the throttle body's off i was able to get in there and see the hoses and where its leaking,20130807_213405.jpg so i thought, after pulling the baffle back it looked like it might be a head gasket leaking20130807_214513.jpg but with the throttle body's off i couldn't start the bike to check and see where it was leaking so i had to think of something else, so i took off the pipe that goes to the cold start on the throttle body's20130808_182218.jpg and on the tee i hooked up a hose that i then ran to an air compressor20130808_182213.jpg and turned it to about 13lbs when i heard bubbles in the over flow i lowered it down. it then showed me that i had two other pipes that where leaking at the thermo housing even tho the clamps where tight and that it was not a head gasket leaking at this time. so after replacing the clamps with thicker ones i pressurized the system again and this time no leaks, so i started putting the bike back together, 20130808_182256.jpg this is the socket set up i used to get into where the clamp bolts are located and how to get into them... 20130808_182311.jpg
20130808_182329.jpg 20130808_182356.jpg 20130808_182402.jpg got the throttle body's back on and tried to start the bike and it started but kept back firing, at first i didn't under stand why and i ended up looking at a pic i had taken before and sure enough the map sensor and throttle pos. sensor both have the same connectors on them, well sure enough i had them in the wrong place, so i tried to fit the connector between the metal that holds the throttle body's apart and the block but it wouldn't go, i had to undo the 3 bolts since u cant get to the 4th one easy and i was able to work the wire around the metal bracket and switch positions and then restarted the bike, fired up great and had good throttle response, ran the bike for 10 mins and no leaks so i put it back together and then went for a 10 mile ride, so far so good..... :dr13:
 
Last edited:

SupraSabre

48 Years of SoCal Lane Splitting/Commuting-Retired
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Cedar City, Utah
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12/04 ST 1300s
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000420
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I told Justin that that pressurizing the system like that was pretty bright, something I never thought of. So I told him to explain what he did to the forum.

As you can tell, he has worked on the V45Sabres for so long he can't break the habit of calling the throttlebodies, carbs! But I'm working on him. I'll get him trained sooner or later!:oops:

I believe he should be posting more pics of it too. I just wished he lived closer to me so I didn't have to do all the work on my own bikes! :rofl1:
 
OP
OP
justin_sabre
Joined
Jul 26, 2012
Messages
166
Location
beaverton OR.
Bike
2005 st 1300
STOC #
8733
I told Justin that that pressurizing the system like that was pretty bright, something I never thought of. So I told him to explain what he did to the forum.

As you can tell, he has worked on the V45Sabres for so long he can't break the habit of calling the throttlebodies, carbs! But I'm working on him. I'll get him trained sooner or later!:oops:

I believe he should be posting more pics of it too. I just wished he lived closer to me so I didn't have to do all the work on my own bikes! :rofl1:




i just add more pictures and went threw and changed carbs to throttle body's just for u... haha as for working on ur bike u can just plan a ride up here from time to time or fly me down when im in Sacramento
 

SupraSabre

48 Years of SoCal Lane Splitting/Commuting-Retired
Site Supporter
Joined
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12/04 ST 1300s
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000420
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5901
[QUOTE;1653587]Great kid, you should be proud. It does suck when they start looking smarter than you....but great none the same. Good job.[/QUOTE]

I'm not too worried about him looking smarter than me, it just goes to show I trained him well!

At 12yrs old I had him in pulling a car apart for me. Him and I did a v6 engine swap and interior swap from a wrecked 79 Chevy Monza stationwagon to a 76 Pontiac Astre (like the Vega) station wagon.
 

970mike

Mike Brown
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You may want to replace those hoses also as they age they start to weep from the inside out. Don't ask me how I know that! My hoses and clamps were replaced at 100,000 miles. And send the warranty calim to your dad!! :D
 

SupraSabre

48 Years of SoCal Lane Splitting/Commuting-Retired
Site Supporter
Joined
Nov 20, 2005
Messages
9,521
Location
Cedar City, Utah
Bike
12/04 ST 1300s
2024 Miles
000420
STOC #
5901
You may want to replace those hoses also as they age they start to weep from the inside out. Don't ask me how I know that! My hoses and clamps were replaced at 100,000 miles. And send the warranty calim to your dad!! :D
Actually all hoses (other than the one he found the hole in, were replaced at 116K, along with the thermostat, so he should have another 50K before the rest need replacing! :)
 
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