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11
MK II B roadsters ('67 to '74 1/2) / Radiator problem
« Last post by Perry69 on February 20, 2021, 11:47:54 AM »
I have a '69 B. I bought it three years ago but know very little of the history of it. Recently the radiator has begun leaking. It has a "pusher fan" attached to the front of the rad and it appears the fan is attached to the radiator with four spring-loaded bolts that are through the radiator itself. It is around these attachments where coolant has begun to seep out. The fan appears to be very similar to the Hayden electric fan on page A58 of the newest Moss catalog. Here are my questions: 1) should I replace the radiator or can the leakage be fixed? If a replacement is warranted are the aluminum rads in the Moss catalog reliable? Can a standard fan be attached to the pulley assembly on the fore end of the engine or should I stick with the electric fan? Currently the engine does not have a fan. As you can tell I am not "mechanically gifted" when it comes to these things. Any help is greatly appreciated.
12
MK II B roadsters ('67 to '74 1/2) / Re: Loss of Power
« Last post by Art on February 19, 2021, 08:35:44 AM »
Hi Heinz,

Adding to John's comments, another very common issue with these cars is the advance system of the distributor.  Failure of the advance system vacuum pot causes much the same loss of power issues as you are seeing under acceleration. 

There's a mechanical advance system as well that can get rusty and stick or the springs become weak or break.  Generally if in good shape, that system could work up to a certain point, but sudden changes, like hard acceleration, or at higher RPM it would not and the engine would 'bog down' and sputter.

Your B should have the 45D4 Lucas distributor, which parts are still available for and a complete new replacement unit is still made and available from Moss or other catalogs.

Safety Fast!

Art
13
Cars for sale / 1964 MGB Roadster
« Last post by amgba on February 17, 2021, 11:16:01 PM »
1974 MGB Roadster. # GHN5UE331726G, Full body restoration, powder-coated wheels, new top and interior. Drive train from 1971 roadster (18GK engine) supplanted. New clutch and hydraulics. Brake system rebuilt. Comes complete with full tonneau & boot cover, jack & toolkit. Runs as good as it looks. $12,000. Bob at 304-268-9440. WV
14
Transmission Related Discussion / Re: Overdrive Transmission Replacement
« Last post by JohnTwist on February 14, 2021, 01:03:10 PM »
The simple answer is YES!!

The drive shaft is the same length.  The gearbox mounts are the same. The reverse light wiring (Green and Green/Brown) is the same.  You can move your seat belt warning switch from one remote control housing to the other (if you wanted to – most wouldn’t bother).  The BIGGY here is to test the 3-4 lockout switch TWENTY times to ensure it goes continuous in 3 and 4 (or, if it’s a later gearbox (sidefill) maybe just 4th). 

Change the front and rear seals and ALL the O rings before you install it. 

Hope this helps!
John H Twist
SAFETY FAST!
University Motors Online
www.universitymotorsltd.com
15
Transmission Related Discussion / Overdrive Transmission Replacement
« Last post by march2021 on February 14, 2021, 01:01:09 PM »
I have a question about a transmission.

Is it possible to take out a 1973 four speed transmission and replace it with a transmission with overdrive? Other than an electrical connections of course.
Tommy K.
Virginia Beach, Virginia.
16
MK I B roadsters ('62 to '66) / Re: Gauges
« Last post by JohnTwist on February 14, 2021, 01:03:56 PM »
That 5/8-18 thread runs from the TC through the 1980 MGB.  So the safety gauge temp bulb will fit right into the head.  You may be able to find an original gauge labelled in degrees Centigrade or Fahrenheit as the more modern gauges are simple C-N-H.  If you find a used unit on eBay or from Paul Dierschow at Sportscar Craftsmen in Arvada Colorado, you can have it rebuilt and calibrated by Nisonger Instruments in Mamaroneck, New York.   New gauges, made in China, are available, too.

Hope this helps

John H Twist
SAFETY FAST!
University Motors Online
www.universitymotorsltd.com
17
MK I B roadsters ('62 to '66) / Gauges
« Last post by march2021 on February 14, 2021, 01:00:01 PM »
I have a rather simple but technical question and I can't seem to get a straight answer out of Moss Motors.  Basically my question is about temperature sensors but it is model year specifics that I need.   I'll make the story as short as possible.

I have a 1966 MGB roadster, so it started life with the combination oil pressure & water temperature gauge (Safety Gauge?).  For some reason a previous owner replaced this with separate oil pressure and water temp gauges.  This may (or may not) be related to the fact that my '66 MGB has a 1973 engine in it (18V672Z-Lxxx).  Therefore it has HIF-4 carbs, but it still has a generator and it is a positive earth car. 

I would love to go back to the combo gauge so I can put my fuel gauge back into the dashboard where it belongs.  Luckily my '73 engine does not have the electronic oil pressure gauge setup, so the oil pressure part is not an issue.  My real question (finally!) is the following.

Will this meter work in my car? In other words, will the capillary tube from a safety gauge mate with my 1973 cylinder head?  Is there anything else I need to know about this?

Thanks again
Don Strait
18
Questions and Answers / Re: Oil Leak
« Last post by JohnTwist on February 14, 2021, 01:04:40 PM »
I know both Moss and Engel (Kalamazoo, Michigan) have that thin cork gasket, Moss # 296-370.  Use it with Ultra Black or “The Right Stuff,” both by Permatex.

Hope this helps.

John H Twist
SAFETY FAST!
University Motors Online
www.universitymotorsltd.com
19
Questions and Answers / Oil Leak
« Last post by march2021 on February 14, 2021, 12:58:46 PM »
I am chasing an oil leak from the front side cover of my MGB. I have heard you state that the gasket for a side cover should be the one for a MGA which is cork. For the life of me, I can not find a cork one. Who supplies them?

Thank you!
Doug Miller
20
MK II B roadsters ('67 to '74 1/2) / Re: Speedometer Erratic
« Last post by JohnTwist on February 14, 2021, 01:05:59 PM »
The cable is the usual suspect – but since you’ve changed it, the problem is within the speedo.  On some of the later models, the speedo driving gear on the main shaft of the gearbox can freewheel, but I’m certain that yours is keyed.  You can find another, used (and possibly faulty) speedo on eBay.  I know Nisonger in Mamaroneck, New York can rebuild your speedo or replace the guts with a GPS system.

Hope this helps at this late date.

John H Twist

SAFETY FAST!
University Motors Online
www.universitymotorsltd.com
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