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New CGT

Posted by markhooks

MG, Triumph, Austin-Healey, Jaguar, Classic British Car Restoration Parts & Accessories

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New CGT #1
markhooks Mark Hooks Oklahaoma City, USA	Posted: May 18, 2012 08:47PM Registered: 1 year ago Posts: 100

This one is mine now:
http://oklahomacity.craigslist.org/cto/2955903556.html

http://www.mgexperience.net/phorum/read.php?48,2049469,2062595#msg-2062595

It is the second one I have owned. It hasn't been run in a year, so the carbs and brakes need attention. I also found a couple of cups of coolant in the bottom of the oil pan. Given that the radiator header tank was cracked I am suspicious that it froze at one point. I pulled the head and found that there was no coolant in the cylinders and no cracks in the head (cleaned and mangafluxed). What is the weak spot for cracks or leaks in the lower half? Are there any freeze plugs in the timing chain housing?

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Re: New CGT #2
trymes Tom Rymes Concord, NH, USA 1959 Riley 1.5 1969 MG MGC GT ~ For Sale ! ~ 1971 Jaguar XJ6 Series 1 1971 MG MGB GT 1972 Chevrolet C20	Posted: May 21, 2012 08:45AM Registered: 4 years ago Posts: 3,259

I can't help on the technical questions, but I wish you luck! Please post up some pictures when you have a chance, as I'd be interested in the car's actual condition. I know that the pictures were pretty bad in the CL ad.

Tom

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Re: New CGT #3
kirks-auto robert kirk Davenport, Iowa, Rock Island, Illinois, Clearwater, USA	Posted: May 21, 2012 11:12AM Registered: 4 years ago Posts: 13,163

Welcome Mark to the best MG forums that can be found the the best MGC forum and group anywhere.

The core/welch/freeze plugs are on the sides of the block not front or rear. One on the back of the head a little smaller than the block plugs which number 2 each side.

You can find an invaluable PDF on my web site that illustrates and numbers all the parts for the MGC most importantly the items that are totally unique to the MGC. If at some time you need new parts, those numbers are my base for sourcing any suppressions and OEM parts you may need.

Once your motor is sorted, the brakes and front end should command your inspection and attention. The MGC is virtually unique from the firewall forward and the 4 wheels. Front floor pans and gauges being the only other parts I can think of off the top. Everything else is mostly MGB

Regards,
Robert Kirk
kirkbrit@yahoo.com
563 323 1017
Moss distributor UK importer
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Kirk's Auto Parts for your classic British and Italian car. 30 years in business.

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Re: New CGT #4
C8407 Craig Cummings Williamsburg, Virginia, USA 1969 MG MGC GT	Posted: May 21, 2012 12:57PM Registered: 5 years ago Posts: 259

I think I "C" one on the rear of the block....
Craig

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Re: New CGT #5
kirks-auto robert kirk Davenport, Iowa, Rock Island, Illinois, Clearwater, USA	Posted: May 21, 2012 01:06PM Registered: 4 years ago Posts: 13,163

Yes....below the head not in the head...where was my "head" when I gave such heady advice?

Regards,
Robert Kirk
kirkbrit@yahoo.com
563 323 1017
Moss distributor UK importer
Beat or match any retail/delivered quote

How to advertise on this website

Kirk's Auto Parts for your classic British and Italian car. 30 years in business.

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Re: New CGT #6
markhooks Mark Hooks Oklahaoma City, USA	Posted: May 21, 2012 10:42PM Registered: 1 year ago Posts: 100

Thanks for the tips. Here is an update. I had the head cleaned and crack checked, no problems there. The only internal plugs I have found that would allow coolant to leak inside the block are the brass plugs in the top of the head. I drilled through one and they are about 1/4 inch thick and tightly held so I dont think that's the problem.

Are there any freeze plugs inside the timing chain cover? If one leake there it could possibly wind up in the oil pan.

I refaced the exhaust valves and seats and compounded the intakes. While I was in there I installed intake guide seals. Hopefully that will keep it from sooting up. I think I am going to reinstall the head and pressurinze the cooling system to see if any more coolant winds up in the oil pan.

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Re: New CGT #7
ron neal Coastal, South Carolina, USA 1962 MG MGA MkII 1968 MG MGC 1969 MG MGC 1969 MG MGC 1969 MG MGC GT → more	Posted: May 22, 2012 06:21AM Registered: 4 years ago Posts: 3,330

Mark

I did loose one of those brass plugs in the head once while in RI. Made lots of white smoke and sump was full of antifreeze. I staked the plug back in, changed the oil and filled up the radiator and am still driving it. That was 1990.

Ron

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Re: New CGT #8
Restoman Dana R amston, connecticut, USA 1959 MG MGA 1500 1967 Jaguar E-Type Coupe 1968 MG MGC GT 1969 MG MGC	Posted: May 22, 2012 04:54PM Registered: 2 years ago Posts: 346

Hi Mark, welcome to the "C" community! There are no freeze plugs in the front timing area.

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Re: New CGT #9
Swamperca Swamper CA Nor Cal, USA 1969 MG MGB GT "Rat" 1969 MG MGC GT "A 69 MGC" 1970 MG MGB GT "Widow" 1971 MG MGB "Ruby" 1974 MG MGB "Groovy B"	Posted: May 22, 2012 09:47PM Registered: 8 years ago Posts: 7,660

The inside of your engine has some sort of something allover it.

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Re: New CGT #10
ron neal Coastal, South Carolina, USA 1962 MG MGA MkII 1968 MG MGC 1969 MG MGC 1969 MG MGC 1969 MG MGC GT → more	Posted: May 23, 2012 05:28AM Registered: 4 years ago Posts: 3,330

Dana
Nice job of wire tying tensioner and shoe, You have spent some time painting that puppy. What else have you done to the motor prior to the assembly? Very nice job.

Ron

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Re: New CGT #11
Restoman Dana R amston, connecticut, USA 1959 MG MGA 1500 1967 Jaguar E-Type Coupe 1968 MG MGC GT 1969 MG MGC	Posted: May 23, 2012 05:32PM Registered: 2 years ago Posts: 346

Ron,
I'm starting a journal on the engine assembly. Got one entry done, and will add more info and specs.

DR

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Re: New CGT #12
markhooks Mark Hooks Oklahaoma City, USA	Posted: May 27, 2012 11:50PM Registered: 1 year ago Posts: 100

I wound up pulling out those brass plugs because I had the head "creamated". My 91 year old machinist buddy said they wouldn't stay put after the heat. When I pulled them out they did look like coolant had been seeping up the sides. There was a lot of oxidation on them.

To fix it, I found that you can tap out the holes with a 1/2 inch national pipe thread tap and install cast iron plugs in them. I used thread tape to seal them. I'm normally an originality nut but I wanted the peace of mind knowing these wouldn't leak. Besides, they are underneath the valve cover.

Hopefully I will have the car back together next weekend.

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