HELP! Leaky water pump or hose or something - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jmil1974 · 03-28-2003, 10:21 PM

Well sh!t! After wrestling with my new short water pump all day, I got it in but can't get it to stop leaking. I even got a new lower hose. The pump is from a Corvette, it was all Autozone had that would fit. The only thing I can think of is that the pump came with a very short rod, the same width and about half the length of the bolts used for the pump. Was this necessary to put in the pump somewhere? It looked like the bolt would seal the hole but h3ll if I know. Can anyone help out? It leaks like a sieve and I need to get it on the road and this is all I lack. Do I need to pull the pump and stick this piece back in somewhere? Any help would be MUCH appreciated!

Thanks!
Jason

*racedvl* · 03-28-2003, 10:55 PM

Where is is leaking from?!?

Blue Beard · 03-28-2003, 11:38 PM

almost sounds like the gaskets aren't right..............or is it leaking thru the back gasket of the pump?

da-burb · 03-28-2003, 11:55 PM

That sounds like the pin that goes on one side of the water pump. I think it is the side with the lower hose neck. 2 of the holes have bolts in them, the 3rd had that pin. Now it shouldn't really matter if it is there or not because the gasket still seals that area. I don't know what that pin does but I do remember putting it in on my 65-327.

jmil1974 · 03-29-2003, 01:01 AM

It SEEMS to be leaking from the lower radiator hose but I can't be 100% sure. The heater hose fitting is dry for sure, as are the flanges where the pump attaches to the block. I know many of my accessories are from a 327 if that makes a difference. Will leaving out that pin make a difference? Shouls I tear it all off and put it in? Getting that pump on was a b!tch with my aftermarket A/C brackets so the thought of doing it again peeves me. I guess the casting of the pump could be too rough to seal but it leaks pretty badm about 2 drops a second. Could my hose clamps be bad? They seem ok, but dang, I'm kinda desperate.

GreenMystChevy · 03-29-2003, 01:24 AM

Try new hose clamps and triple check that the radiator hose is ALL of the way on and that the clamps are tight. Sounds obvious but sometimes the solutions are that easy. Good clamps are cheap and worth it.

If still leaking, even though it might be another pain in the @$$, I would recomend taking off the pump, scraping both the block and pump clean of all gastket sealant and anything else, checking pump for any obvious warpage and then install new gaskets with liberal and very well placed sealant.

I'd do what I could to help ya if you were closer to help with the stress. Good luck!

jmil1974 · 03-29-2003, 10:01 AM

The hose is on ALL the way and the clamps are as tight as they will go. I'll go get new ones just to be sure. Thanks for the help so far, guys. Keep 'em comin'!

jhow66 · 03-29-2003, 01:50 PM

That sounds like the pump shaft seal leaking. There is a small hole under the shaft casting --see if the leak is coming from it. If so--bad pump.

jmil1974 · 03-29-2003, 07:32 PM

Well damn, the water seems to be coming through the lower bolt hole in the casing. Does that help any? I can get some pics later.

Class of 69 · 03-29-2003, 07:43 PM

Yes, the bolt holes go thru the block into the water jacket, and needs to have a good pipe joint sealant on them to prevent the coolant from following the bolt out ...

03-28-2003, 10:21 PM	#1
jmil1974 Ain't we cute? Join Date: May 2002 Location: Friendswood, TX Posts: 700	HELP! Leaky water pump or hose or something Well sh!t! After wrestling with my new short water pump all day, I got it in but can't get it to stop leaking. I even got a new lower hose. The pump is from a Corvette, it was all Autozone had that would fit. The only thing I can think of is that the pump came with a very short rod, the same width and about half the length of the bolts used for the pump. Was this necessary to put in the pump somewhere? It looked like the bolt would seal the hole but h3ll if I know. Can anyone help out? It leaks like a sieve and I need to get it on the road and this is all I lack. Do I need to pull the pump and stick this piece back in somewhere? Any help would be MUCH appreciated! Thanks! Jason __________________ 69 C10 2WD LWB Fleet 350/350 power front disc conversion (6 lug disc kit from gmcpauls) and new engine, PS, A/C, fresh fluids, SHE DRIVES! FOR SALE $3900

03-28-2003, 11:38 PM	#3
Blue Beard Registered User Join Date: Jan 2003 Location: Washington State Posts: 8,834	almost sounds like the gaskets aren't right..............or is it leaking thru the back gasket of the pump? __________________ 1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo

03-28-2003, 11:55 PM	#4
da-burb "Ochre Ogre" Join Date: Apr 2000 Location: Springfield, MN Posts: 3,558	That sounds like the pin that goes on one side of the water pump. I think it is the side with the lower hose neck. 2 of the holes have bolts in them, the 3rd had that pin. Now it shouldn't really matter if it is there or not because the gasket still seals that area. I don't know what that pin does but I do remember putting it in on my 65-327. __________________ Bowtie Truck Stop Inc. Mid-West GM Truck Restoration Parts Supplier Your Key Parts, Auto Metal Direct, Dynacorn, and Goodmark dealer. like us @ www.facebook.com/BowtieTruckStop 1971 C-10 Suburban (Ochre) 1971 K-10 Suburban (Ochre) 1972 C-10 Suburban (Ochre) 1972 K-20 Suburban (Yellow- that just aint right!) Springfield, Minnesota 56087

03-29-2003, 01:01 AM	#5
jmil1974 Ain't we cute? Join Date: May 2002 Location: Friendswood, TX Posts: 700	It SEEMS to be leaking from the lower radiator hose but I can't be 100% sure. The heater hose fitting is dry for sure, as are the flanges where the pump attaches to the block. I know many of my accessories are from a 327 if that makes a difference. Will leaving out that pin make a difference? Shouls I tear it all off and put it in? Getting that pump on was a b!tch with my aftermarket A/C brackets so the thought of doing it again peeves me. I guess the casting of the pump could be too rough to seal but it leaks pretty badm about 2 drops a second. Could my hose clamps be bad? They seem ok, but dang, I'm kinda desperate. __________________ 69 C10 2WD LWB Fleet 350/350 power front disc conversion (6 lug disc kit from gmcpauls) and new engine, PS, A/C, fresh fluids, SHE DRIVES! FOR SALE $3900

03-29-2003, 01:24 AM	#6
GreenMystChevy Registered User Join Date: Jan 2002 Location: Woodinville, WA Posts: 513	Try new hose clamps and triple check that the radiator hose is ALL of the way on and that the clamps are tight. Sounds obvious but sometimes the solutions are that easy. Good clamps are cheap and worth it. If still leaking, even though it might be another pain in the @$$, I would recomend taking off the pump, scraping both the block and pump clean of all gastket sealant and anything else, checking pump for any obvious warpage and then install new gaskets with liberal and very well placed sealant. I'd do what I could to help ya if you were closer to help with the stress. Good luck! __________________ Jeremy '71 C-10 '72 GMC K2500 '72 Nova (Dad's) '70 Chevelle SS '55 Sedan Delivery Attempting to build up this here 4x4...make her real tall and purty...well, maybe just tall

03-28-2003, 10:55 PM	#2
racedvl Account Suspended Join Date: Jan 2000 Location: Woodstock, IL Posts: 7,020	Where is is leaking from?!?

03-29-2003, 10:01 AM	#7
jmil1974 Ain't we cute? Join Date: May 2002 Location: Friendswood, TX Posts: 700	The hose is on ALL the way and the clamps are as tight as they will go. I'll go get new ones just to be sure. Thanks for the help so far, guys. Keep 'em comin'! __________________ 69 C10 2WD LWB Fleet 350/350 power front disc conversion (6 lug disc kit from gmcpauls) and new engine, PS, A/C, fresh fluids, SHE DRIVES! FOR SALE $3900

03-29-2003, 01:50 PM	#8
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	That sounds like the pump shaft seal leaking. There is a small hole under the shaft casting --see if the leak is coming from it. If so--bad pump. __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer

03-29-2003, 07:32 PM	#9
jmil1974 Ain't we cute? Join Date: May 2002 Location: Friendswood, TX Posts: 700	Well damn, the water seems to be coming through the lower bolt hole in the casing. Does that help any? I can get some pics later. __________________ 69 C10 2WD LWB Fleet 350/350 power front disc conversion (6 lug disc kit from gmcpauls) and new engine, PS, A/C, fresh fluids, SHE DRIVES! FOR SALE $3900

03-29-2003, 07:43 PM	#10
Class of 69 Registered User Join Date: Mar 2003 Location: Stillwater MN Posts: 1,166	Yes, the bolt holes go thru the block into the water jacket, and needs to have a good pipe joint sealant on them to prevent the coolant from following the bolt out ... __________________ 69 GMC K10 ..some restoration required....still..



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