Coolant leak still after water pump replaced
08-18-2013, 11:35 AM
#1
Coolant leak still after water pump replaced
Had the watet pump replaced and there is still a intermittent leak. What are the usual suspects?
Last edited by Shannon and Ian; 08-18-2013 at 07:19 PM.
08-18-2013, 01:04 PM
#2
You'll have to be more specific. Figure out the source location of the leak let us know. Is it leaking while running, or shut down? Hot or cold? Where is the coolant landing or spreading to?
08-19-2013, 06:11 AM
#3
From a visual it looks like it is behind the comprssor
Last edited by Shannon and Ian; 08-19-2013 at 06:37 AM.
08-19-2013, 11:17 AM
#9
Ok. Took it today but he was packed so I will drop it off tomorrow. Was told there are two o rings amd it is possible but unlikely. Most likely the front cover. He says some cars are held by bolts snd gaskets ehete the VQ is held by rvt. May need resealing but he is checkkng all.
08-30-2013, 11:59 AM
#10
Inside the front cover there is another plate (I saw it but do not remember the name). It is held by RVT. It was leaking from there. He had to change the timing gear while he was there it was so deep. The job itself cost $400.00 total. Not bad.
01-14-2019, 04:49 PM
#12
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Did you ever remember the name of the plate inside that was leaking? I'm having the same issue and about to start beating my head against the wall.
01-14-2019, 05:04 PM
#13
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01-14-2019, 05:50 PM
#16
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They were lubed. Actually the first water pumps that I put in I had put in just a little bit askew and it had cracked the back Edge that holds the O-rings so I ordered another water pump and installed it, it leaked the same way... took it out I reinstalled it again to make sure all the O-rings are in good shape, but again same results
01-15-2019, 01:08 PM
#17
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They were lubed. Actually the first water pumps that I put in I had put in just a little bit askew and it had cracked the back Edge that holds the O-rings so I ordered another water pump and installed it, it leaked the same way... took it out I reinstalled it again to make sure all the O-rings are in good shape, but again same results
It's possible that there was some roughness on the well which the pump slides into. That roughness could allow coolant to slip by.
I replaced my pump a few years ago. I noticed that there was fused on, or vulcanized rubber from the O ring covering the metal well. I took some time to remove that rubber with a single edged razor blade.
Then I sanded the area perfectly smooth with 600 grit black sandpaper. No leaks.
01-15-2019, 04:58 PM
#18
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It's possible that there was some roughness on the well which the pump slides into. That roughness could allow coolant to slip by.
I replaced my pump a few years ago. I noticed that there was fused on, or vulcanized rubber from the O ring covering the metal well. I took some time to remove that rubber with a single edged razor blade.
Then I sanded the area perfectly smooth with 600 grit black sandpaper. No leaks.
I replaced my pump a few years ago. I noticed that there was fused on, or vulcanized rubber from the O ring covering the metal well. I took some time to remove that rubber with a single edged razor blade.
Then I sanded the area perfectly smooth with 600 grit black sandpaper. No leaks.
01-15-2019, 05:21 PM
#19
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You might want to inspect the O ring.
01-15-2019, 11:08 PM
#20
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Between the engine and timing chain inner cover are gaskets or seals of RVT. Leaking from there is possible.
The timing chain is between two metal covers. One faces the alternator belt pulleys and the other contacts the passenger side of engine. The water pump extends through both covers and moves coolant through a path on the side of engine. The inner cover has gaskets or silicon sealed area surrounding the area where water pump extends through to the engine. The gasket is on the side where the cover is attached to the engine and keeps coolant within the water pump area.
If the gasket (silicon sealant) deteriorates coolant will leak. Removing both timing chain covers to replace gaskets and apply silicon sealant is time consuming thus costly.
There are also oil seals on the crankshaft which should also be replaced when the covers are off.
a gasket or Silicon seal keeps coolant flow inside the coolant flow path. If the seal or gasket does not hold, coolant will leak and the leak can be a lot of coolant. Will post photos of the gasket location on the side of timing chain cover attached to engine and surrounding the water pump location.
**I can not get jpg file to attach or upload. one aspect I need to learn more about is the circular hole on side of engine where water pump extends into has a channel at bottom which I believe is to provide a path for water leaking past water pump o-rings. will ask mechanic for additional explanation.
The timing chain is between two metal covers. One faces the alternator belt pulleys and the other contacts the passenger side of engine. The water pump extends through both covers and moves coolant through a path on the side of engine. The inner cover has gaskets or silicon sealed area surrounding the area where water pump extends through to the engine. The gasket is on the side where the cover is attached to the engine and keeps coolant within the water pump area.
If the gasket (silicon sealant) deteriorates coolant will leak. Removing both timing chain covers to replace gaskets and apply silicon sealant is time consuming thus costly.
There are also oil seals on the crankshaft which should also be replaced when the covers are off.
a gasket or Silicon seal keeps coolant flow inside the coolant flow path. If the seal or gasket does not hold, coolant will leak and the leak can be a lot of coolant. Will post photos of the gasket location on the side of timing chain cover attached to engine and surrounding the water pump location.
**I can not get jpg file to attach or upload. one aspect I need to learn more about is the circular hole on side of engine where water pump extends into has a channel at bottom which I believe is to provide a path for water leaking past water pump o-rings. will ask mechanic for additional explanation.
Last edited by jayboydog; 01-17-2019 at 05:59 AM. Reason: addl ideas
01-16-2019, 02:17 PM
#22
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01-16-2019, 07:22 PM
#23
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On the original I took out, there is a definite difference in the O-rings. The outer one was quite a bit thicker than the inner one. The ones that came with the new water pump however were two of the same color and there was no noticeable difference in thickness. So therefore I don't believe orientation is an issue, but definitely considered that they weren't correct. However the outer one on The Originals was the one that was larger and of a different color, and that one would not be these a ring that would be leaking into the weep hole.
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