Water pump supposed to be reverse rotation...Why is it blowing coolant out the spout?

Stang_ROTY · 08-03-2001, 03:14 PM

I'm trying to see if the water pump is the source of my cooling problem so after I replaced the crank pulley with the standard diameter and start the engine with the rad. cap off. I let it run a few minutes and then it starts to blow the coolant out onto the ground. Does this mean that I have the wrong water pump. It's supposed to be a reverrse rotation Edelbrock. But if it's blowing out does that mean it's a standard rotation??

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Finally DONE!!
93 GT, 393 stroker w/ Edlebrock Performer heads and EFI, 30lb injectors, Dynamic Roller Mite C4, 8 pt cage, Sothside Machine bars & Sub-frames, 3.73's, '69 351W block w/SCAT crank.

PKRWUD · 08-03-2001, 09:55 PM

It blows it out because the radiator was full when you started it, and as it heats up, it expands. Once the t-stat opens, it should just flow without blowing out.

Take care
~Chris

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Retired Moderator
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Stang_ROTY · 08-04-2001, 11:12 AM

That makes sense/ I'll try it again today. That,and a leak down test should help sort thingd out.

08-03-2001, 03:14 PM	#1
Stang_ROTY Registered Member Join Date: Feb 2001 Location: Berkshire County - Massachusetts Posts: 735	Water pump supposed to be reverse rotation...Why is it blowing coolant out the spout? I'm trying to see if the water pump is the source of my cooling problem so after I replaced the crank pulley with the standard diameter and start the engine with the rad. cap off. I let it run a few minutes and then it starts to blow the coolant out onto the ground. Does this mean that I have the wrong water pump. It's supposed to be a reverrse rotation Edelbrock. But if it's blowing out does that mean it's a standard rotation?? ------------------ Finally DONE!! 93 GT, 393 stroker w/ Edlebrock Performer heads and EFI, 30lb injectors, Dynamic Roller Mite C4, 8 pt cage, Sothside Machine bars & Sub-frames, 3.73's, '69 351W block w/SCAT crank.

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08-03-2001, 09:55 PM	#2
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	It blows it out because the radiator was full when you started it, and as it heats up, it expands. Once the t-stat opens, it should just flow without blowing out. Take care ~Chris ------------------ Retired Moderator MustangNet My site: JimPorterRacing RACECAR spelled backwards is RACECAR HEY !!! Are you ASE Certified ??? If you are, ask me about iATN. The best tool you'll ever have, and it's free !!!

08-04-2001, 11:12 AM	#3
Stang_ROTY Registered Member Join Date: Feb 2001 Location: Berkshire County - Massachusetts Posts: 735	That makes sense/ I'll try it again today. That,and a leak down test should help sort thingd out.