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Jul 21st, 2025 | | | | Joined: Jan 2011 Posts: 60 Wrench Fetcher | | Wrench Fetcher 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 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | 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 SuperIn the Gallery Forum | | | | | Joined: Apr 2008 Posts: 888 'Bolter | | 'Bolter Joined: Apr 2008 Posts: 888 | 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
| | | | | Joined: Jan 2011 Posts: 60 Wrench Fetcher | | Wrench Fetcher 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 Posts: 29,262 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,262 |
There might also be a drain/petcock on the lower-right of the manifold side.
| | | | | Joined: Jun 2005 Posts: 1,756 Shop Shark | | Shop Shark Joined: Jun 2005 Posts: 1,756 | I don't have one either on a aftermarket radiator from Jegs.
Just have to drop the hose SLOWLy | | | | | Joined: Jan 2011 Posts: 60 Wrench Fetcher | | Wrench Fetcher 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 'Bolter | | 'Bolter 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 Posts: 60 Wrench Fetcher | | Wrench Fetcher 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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