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#746770 05/12/2011 7:33 PM
Joined: Jan 2011
Posts: 60
Z
Wrench Fetcher
Wrench Fetcher
Z Offline
Joined: Jan 2011
Posts: 60
Have a probably dumb question?I have an original Harrison radiator in my 51Chevy.And I cannot find the drain plug? I was wanting to install a temp sending unit, need to drain the radiator.Any help out there?Thanks

Last edited by Z71Chevy; 05/12/2011 7:38 PM.
Joined: Jun 2004
Posts: 8,597
W
Riding in the Passing Lane
Riding in the Passing Lane
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It should be close to the bottom facing forward at an angle. If there is no petcock it may have a pipe plug in it or part of the petcock is broke off. You can remove the plug & put in a petcock. If someone has soldered over it you will need to pull the lower hose loose. Have a large pan. It will get messy.


They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.
1972 Chevy c10 Cheyenne Super
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F
'Bolter
'Bolter
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My petcock is located on pass side front of lower tank, the lower hose enters at the pass side rear of the tank. My radiator is also a Harrison.


Ed
Forty9 #746961 05/13/2011 11:51 AM
Joined: Jan 2011
Posts: 60
Z
Wrench Fetcher
Wrench Fetcher
Z Offline
Joined: Jan 2011
Posts: 60
Thanks,for all of the respones,guys. I will check the locations mentioned. I am thinking I will have to go with a big PAN! Thanks for all the comments,and you all,have a great weekend.

Joined: Sep 2001
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Bubba - Curmudgeon
Bubba - Curmudgeon
Joined: Sep 2001
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There might also be a drain/petcock on the lower-right of the manifold side.

Joined: Jun 2005
Posts: 1,756
G
Shop Shark
Shop Shark
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I don't have one either on a aftermarket radiator from Jegs.
Just have to drop the hose SLOWLy

Joined: Jan 2011
Posts: 60
Z
Wrench Fetcher
Wrench Fetcher
Z Offline
Joined: Jan 2011
Posts: 60
Thanks,everybody for your responses. I found the draincock,on my 51,I couldn't see the forest for the trees.It was exactly where,Forty9 said his was located. The transmission cooler was obstructing the view,but not where I couldn't get to it.Drained the radiator,and got my temp sending unit installed. Thanks again.

Joined: Apr 2005
Posts: 1,107
5
'Bolter
'Bolter
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Joined: Apr 2005
Posts: 1,107
if you still have it drained it would be worth while to open the drain cock on the side of the block and drain it. remove the drain cock from the block and rod and flush out all the crap that's been accumilating in there for years.

Joined: Jan 2011
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Z
Wrench Fetcher
Wrench Fetcher
Z Offline
Joined: Jan 2011
Posts: 60
51 ashton,Thanks,I don't have the original 6cyl engine.I have a 350 small block in there now. The original temp sending unit,was really strechted out to reach,the one on the 8cyl location,so I had to get one for a 8cyl. You are right about the flushing out.The engine I have in there now had just been rebuilt.Thanks


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