| Leak (seep) in rad [message #277600] |
Sun, 10 May 2015 17:33  |
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RF_Burns
Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada
Karma: 3
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Hi all
I had the rad re-cored in 2010 and since about 2012 there has been a evidence of a very slow leak at the bottom passenger side. At this point, after an all day run, it will be damp in that corner. On a kleenix it is green so it is antifreeze and not condensate from the AC.
What is the consensus on stuff such as "bars-leak" etc?
Thanks
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
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| Re: Leak (seep) in rad [message #277605 is a reply to message #277600] |
Sun, 10 May 2015 18:59  |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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RF_Burns wrote on Sun, 10 May 2015 18:33Hi all
I had the rad re-cored in 2010 and since about 2012 there has been a evidence of a very slow leak at the bottom passenger side. At this point, after an all day run, it will be damp in that corner. On a kleenix it is green so it is antifreeze and not condensate from the AC.
What is the consensus on stuff such as "bars-leak" etc?
Thanks
Bruce,
That stuff does work, and it will probably get you through a non-extreme season.
But, were I you, I would put getting it out to get fixed right on my to do or at least the winter work list.
Remember, I am paranoid, old and paranoid.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: Leak (seep) in rad [message #277635 is a reply to message #277600] |
Mon, 11 May 2015 08:32 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Take it back to the shop, point at the damp spot, and look unhappy. And if you haven't yet, cut the mount at the bottom sides and bolt a pair of hinges on per Ken H's setup. Makes R&R a lot easier.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: Leak (seep) in rad [message #277681 is a reply to message #277677] |
Mon, 11 May 2015 17:57 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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RF_Burns wrote on Mon, 11 May 2015 15:08Actually I'm a bit late now, but I had the work done "professionally". The record rad was a tad wider than the OEM so it never sat right in the rad mounts, they just bolted it down. I didn't notice this till a couple years later.
Over the winter I pulled the old bottom mounts and made new ones for the bottom using Kerry's idea of the aluminum channels. The rubber cushions are new, found them by going to the local GM dealer with the OEM part number. The computer told him a dealer who had new old stock. Paid a large Timmy's for each one.
Took a pic:
http://www.gmcmhphotos.com/photos/misc/p57980-rad-has-a-slight-leak-weep.html
If it didn't sit well the leak may have been caused by that rather than poor workmanship. I'm probably alone on this but I think a radiator sealer has a good chance of being a permanent fix for this type of leak. GM routinely included a dog turd in all new cars to preclude small leaks that may exist.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: Leak (seep) in rad [message #277757 is a reply to message #277600] |
Wed, 13 May 2015 08:37 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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It's actually crushed ginger root. The Nothstar cars had the GM part number right on the core support coolant service suggestions sticker. Stated you must add when coolant serviced
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: Leak (seep) in rad [message #277760 is a reply to message #277600] |
Wed, 13 May 2015 08:42 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Northstar. SP. Or Leakstar if you prefer. They were soooo close to having a true world class powertrain.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: Leak (seep) in rad [message #277808 is a reply to message #277760] |
Wed, 13 May 2015 22:00 |
Steve
Messages: 506
Registered: September 2013
Location: East Greenville, Pa
Karma: 1
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JohnL455 wrote on Wed, 13 May 2015 09:42Northstar. SP. Or Leakstar if you prefer. They were soooo close to having a true world class powertrain.
The Northstar in my 99 Deville, combined with a low gear ratio can really make that big car get up and go. I think I got lucky so far. 120,000 miles and I have not had the dreaded anti-freeze leaks or head gasket issues. It does use a lot of oil, about a quart every 600 miles. Oil is cheap so I will keep driving it. Really nice car and got it dirt cheap due to the oil consumption issue.
I have wondered if the Northstar would bolt to the TH 425 transmission?
1978 GMC Royal
Eastern Pennslyvania
1968 Chevrolet C20 396 Camper Special
1969 Chevrolet C20 Camper Special
1985 Buick Electra Park Avenue
1992 Camaro 25th Anniversary Heretage Edition Black
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| Re: Leak (seep) in rad [message #278097 is a reply to message #277808] |
Wed, 20 May 2015 20:17 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Steve wrote on Wed, 13 May 2015 21:00JohnL455 wrote on Wed, 13 May 2015 09:42Northstar. SP. Or Leakstar if you prefer. They were soooo close to having a true world class powertrain.
The Northstar in my 99 Deville, combined with a low gear ratio can really make that big car get up and go. I think I got lucky so far. 120,000 miles and I have not had the dreaded anti-freeze leaks or head gasket issues. It does use a lot of oil, about a quart every 600 miles. Oil is cheap so I will keep driving it. Really nice car and got it dirt cheap due to the oil consumption issue.
I have wondered if the Northstar would bolt to the TH 425 transmission?
The problem with leakage in the Northstar was oil leaks in the 2 piece crank case joint
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: Leak (seep) in rad [message #278099 is a reply to message #277805] |
Wed, 20 May 2015 20:20 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Gary Mau wrote on Wed, 13 May 2015 19:47 Are these the GM stop leak you are talking about: http://www.amazon.com/Genuine-3634621-Cooling-System-Tablet/dp/B000QIH3C4
The ones we used in the assembly plants were more cylindrical than that--hence the term dog turds. The Cadillac aluminum 4100 series engines were some of the first ones to get these. We called them the aluminum foil engine. They are primarily compressed ginger root made by Barrs leaks in Holly Michigan.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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