Leaky expansion coolant tank?
#1
Leaky expansion coolant tank?
I have a leak or crack somewhere in the tank or hose connected to it, I can visibly see the drips underneath when it gets hot.
Can someone post how to remove for inspection?
I already added the stop leak which didn't make any difference.
If I find the crack can I use JB Water Weld to fix the crack, or would something else work better?
Can someone post how to remove for inspection?
I already added the stop leak which didn't make any difference.
If I find the crack can I use JB Water Weld to fix the crack, or would something else work better?
#2
I've done this a few times.
1. Suck out all the coolant from the tank. Disconnect the coolant sensor pigtail.
2. Remove the hoses from the top of the tank.Pinch them off if they leak.
3. Remove the bolt. Its easier to get to the bottom hose.
4. Remove the bottom hose. Pinch it off or use a wine bottle cork to prevent spillage.
5. Its out!
I don't know if JB Weld will make a permanent fix. I often wonder if several coats of Flex Seal (As Seen on TV) would fix it.
1. Suck out all the coolant from the tank. Disconnect the coolant sensor pigtail.
2. Remove the hoses from the top of the tank.Pinch them off if they leak.
3. Remove the bolt. Its easier to get to the bottom hose.
4. Remove the bottom hose. Pinch it off or use a wine bottle cork to prevent spillage.
5. Its out!
I don't know if JB Weld will make a permanent fix. I often wonder if several coats of Flex Seal (As Seen on TV) would fix it.
Last edited by MRomanik; 10-24-2013 at 06:10 PM.
#3
It could also be a leaking cap...around 20 bucks to replace.
If it is the tank that is cracked also replace it. Don't bet your engine on some JB-Weld. It will fail again under the stress of temperature and pressure.
I hope the Stop Leak has not made the problem worse. Here is a quote from a post on another XK8 forum:
"Have messed up big time, added Bars leak with carbon fibers
to cooling system. Now all these fibers are accumulating in
pressure cap and does not allow pressure to build up. Have
pressure flushed system 3 times and still have fibers
floating around. Considering an in line filter of some kind
to catch fibers before expansion tank. Think original
problem was expansion tank neck and cap not holding
pressure, now replaced. Have bench tested cap and will not
hold pressure with just a trace amount of fiber in there.
They accumulate like a cotton ball fiber."
If it is the tank that is cracked also replace it. Don't bet your engine on some JB-Weld. It will fail again under the stress of temperature and pressure.
I hope the Stop Leak has not made the problem worse. Here is a quote from a post on another XK8 forum:
"Have messed up big time, added Bars leak with carbon fibers
to cooling system. Now all these fibers are accumulating in
pressure cap and does not allow pressure to build up. Have
pressure flushed system 3 times and still have fibers
floating around. Considering an in line filter of some kind
to catch fibers before expansion tank. Think original
problem was expansion tank neck and cap not holding
pressure, now replaced. Have bench tested cap and will not
hold pressure with just a trace amount of fiber in there.
They accumulate like a cotton ball fiber."
Last edited by WhiteXKR; 10-24-2013 at 09:24 AM.
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Graham
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I had good luck on another application with WaterWeld which is a JB Weld product for water-use solutions. You will need to drain the tank so the epoxy can dry correctly.
Despite the fact it might hold long-term, I would not use this as a permanent fix. You will just be doing it again on another spot eventually...most likely at the worst possible moment. Once the plastic in those tanks start going, they never get better.
Despite the fact it might hold long-term, I would not use this as a permanent fix. You will just be doing it again on another spot eventually...most likely at the worst possible moment. Once the plastic in those tanks start going, they never get better.
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You will need a T27 for the expansion tank. Follow the instructions from mromanik at the top. I also added a towel under the tank to catch coolant, and I replaced the clamps at the same time. Just squeeze the outside "humps" with the pliers towards each other.
Once you are done, start the car and let it warm up to esnure no further leaks. I had to adjust the screw type clamps afterwards, since it was still leaking coolant.
If I can do it, ANYONE can do it..
Once you are done, start the car and let it warm up to esnure no further leaks. I had to adjust the screw type clamps afterwards, since it was still leaking coolant.
If I can do it, ANYONE can do it..
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I fixed a leak on the radiator tanks with this stuff. It will easily hold on the expansion tank if applied correctly.
But as mentioned before, use it only until you replace the tank. Not that it won't be permanent, but that the tank will simply start to leak somewhere else.
#19
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Meaning making sure it is completely dried and sand papering it down so the JB Water Weld will stick correctly, or something else?
A new tank.
I fixed a leak on the radiator tanks with this stuff. It will easily hold on the expansion tank if applied correctly.
But as mentioned before, use it only until you replace the tank. Not that it won't be permanent, but that the tank will simply start to leak somewhere else.
I fixed a leak on the radiator tanks with this stuff. It will easily hold on the expansion tank if applied correctly.
But as mentioned before, use it only until you replace the tank. Not that it won't be permanent, but that the tank will simply start to leak somewhere else.