2005 Buick LaCrosse 3.8 Water pump leak after install

Jrio7

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Hello, So today I replaced my Buick’s water pump since it was leaking. Everything went smooth refilled with coolant and started engine. After 5-10 mins of car running the new pump started to leaking from the same place as before with the old pump . I used Permatex gasket maker on gasket both sides. I also made sure all bolts were tight. Could something possibly went wrong when installing ?? Could the new pump possibly be defective? I’m going to exchange it tomorrow for another one and do the job all over again . I really want to get it right this time .any advice helps . Thanks .
 

2007LucerneCXL

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Not sure on where the leak is as no photos. Are you sure it's the water pump and not the plastic elbows or timing chain cover. Yes you could have a new bad pump also, if needed you could pressure test the system to look as a option.
060228GM00-344.png
 

2007LucerneCXL

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Not sure on the video, but is it actually the pump, weep hole, bolt or one of the other areas.
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Jrio7

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2005 Buick lacrosse
Not sure on where the leak is as no photos. Are you sure it's the water pump and not the plastic elbows or timing chain cover. Yes you could have a new bad pump also, if needed you could pressure test the system to look as a option.
View attachment 35193
Here are some pictures . I don’t think is the elbow. It’s spraying from where the pump meets the engine block.
 

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Jrio7

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Here are some pictures . I don’t think is the elbow. It’s spraying from where the pump meets the engine block.
I drew a arrow where it is spraying/leaking and circled the leaking area in blue
 

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2007LucerneCXL

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It appears it's behind the pump, not the elbow as the stream looks to be shooting down, but really hard to see the origin and I don't want to guess. Maybe someone else can see or know if a leak in that area and what would cause it other than issues with the surface, type of gasket or sealant.
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Jrio7

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It appears it's behind the pump, not the elbow as the stream looks to be shooting down, but really hard to see the origin and I don't want to guess. Maybe someone else can see or know if a leak in that area and what would cause it other than issues with the surface, type of gasket or sealant.
Do you have email I could send the video maybe you could see it better? I really don’t know any mechanics or have the $$ to take it to shop.
 

LARRY70GS

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Very difficult to see exactly where the leak is coming from. It looks like the leak is coming from somewhere above. The water pump bolts to the timing chain cover. Some of the bolts go through water, so they need thread sealer. Unless the gasket surface of the timing cover is damaged, the leak is coming from somewhere else. Water pumps commonly leak from the weep hole when the bearing goes and takes out the seal. I would take off the water pump pulley and then pressure test it after drying everything out.
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Jrio7

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Very difficult to see exactly where the leak is coming from. It looks like the leak is coming from somewhere above. The water pump bolts to the timing chain cover. Some of the bolts go through water, so they need thread sealer. Unless the gasket surface of the timing cover is damaged, the leak is coming from somewhere else. Water pumps commonly leak from the weep hole when the bearing goes and takes out the seal. I would take off the water pump pulley and then pressure test it after drying everything out.
I could see it leak from the water pumps gasket housing where it sits against the engine block. There’s a bolt there too.
 

Jrio7

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Timing cover to block gasket.
So it’s either the timing cover or the gasket ? I don’t think it’s leaking there. I could see it spraying from the water pump where the pump is bolted the engine block. Maybe the new gasket broke? To be honest I didn’t clean the old gasket off completely from the engine block so gonna take it off and do that again today .
 

LARRY70GS

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So it’s either the timing cover or the gasket ? I don’t think it’s leaking there. I could see it spraying from the water pump where the pump is bolted the engine block. Maybe the new gasket broke? To be honest I didn’t clean the old gasket off completely from the engine block so gonna take it off and do that again today .

OK, the water pump does NOT bolt to the block, it bolts to the timing cover. The timing cover bolts to the engine block. There are 2 passageways for coolant through the timing cover.

12587003_Primary__ra_p.jpg

Those rectangular passageways can leak if the gasket gets pushed out. In addition, at least 2 of those bolts around the passageways go through water, so they need a thread sealer like Loctite. Those are the long bolts that also secure the water pump.

 

LARRY70GS

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About a year or 2 ago, I had to do the same job on my 1970 Buick GS455 Stage 1. The gasket adjacent to the coolant passage on the passenger side pushed out and was leaking. The job is very similar. You have to remove the harmonic balancer, and replace the gasket on the front of the oil pan. It's an involved job, but doable.
 

BuickGirlFromMars

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OP. you have a few concerning things
1) what pump and gasket did you use? a ac delco with metal frame? did you clean the old one off and make the surface clean/true no nicks
2) what did you do about thread sealant
3) what ddi you do about the two different length bolts becauuse you can put the wrong ones in the wrong spot
4)
Why did you use sealer? Did you torque and let it set up and cure as the instructions require?

did you use SAE too when wrenching on the water pump bolts and pulley, those are SAE not metric. Same with some engine upper end stuff. Mostly else is metric
and is your hose fully seated with the ORIGINAL TYPE constant tension clamp and did you put the spring back in it and also clean the sealing edge of the hose on the timing cover and the inside of the hose?your stream looks like it could be shoot from under the hose from scale buildup jacking up the rubber shooting out

20210226_165718.jpg 20210226_165545_HDR.jpg
also, theres a joke there(With what i last said)
 
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