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Engine Related Items / Carburetor confusion
« Last post by Dkalel on Yesterday at 08:08:15 PM »
I recently bought a 1977 MGB on ebay and I had a question about the carburetor. I noticed while looking through the repair manuals that the MGB cars have two carburetors but my car has only one. Also the previous owner must have installed an aftermarket air filter. The carb on my car is a Zenith 175 CD-2 and like I said only one. The car needs a lot of work done to it and I am capable of some. I replace the spark plugs, the valve gasket and cover, spark plug wires and ignition coil. I took the carb apart and cleaned it out and put some new parts in it. My question is, is this unusual or is it okay? I had the car shipped to my home and when it got here I could barely get the thing started to get it off the trailer. I thought I just bought a piece of crap that didn't run. The ad claimed it was a daily driver but after looking at the engine I could tell that oil was leaking from the valve cover and their was oil on the spark plugs. I didn't pay a lot for it, only $3500. The car had the interior redone and the paint is in good condition. Oh and I also replaced the battery. It has sat for about a month trying to get all the parts either bought at an auto store or an online store. I tried to start it and it isn't wanting to start. It is getting gas and I made sure the spark plug wires are in the right place. I will leave it at this for now. Any suggestions would be great. The odometer shows 60990 miles.
Cars for sale / 1971 MGB
« Last post by amgba on February 20, 2020, 01:04:49 PM »
1971 MGB. Complete mechanical restoration of very solid Texas car. Built for optimal performance & reliability. Performance engine rebuild w/1 " carbs. Stainless steel headers, exhaust. Suspension rebuilt, lowered 1" with stiffer springs, nylon bushings, camber adjusting A-Arms. New leather interior, weather gear, brakes, many electrical components. Lots of spares. $16,500. Have receipts for $24K. (910) 687-0211, .
Suspension Related Items / Re: Brake Fluid
« Last post by JohnTwist on February 14, 2020, 03:20:17 PM »
hose warnings about brake fluid were valid before about 1970.  My suggestion is to use DOT 4.  DOT 3 is OK, too, but DOT 4 removes paint a little slower.  Hope this helps.
John H. Twist
Suspension Related Items / Brake Fluid
« Last post by march2020 on February 14, 2020, 03:08:30 PM »
I purchased a NOS factory master cylinder for the '77-'80 MGB, made by Girling or Lucas i can't remember. It's not an aftermarket one. It is a new one the factory would have used back in the day.  It's also not recently made.I would guess it was made in the late 70's.  I bought it because I want original quality.  The question for you is which brake fluid should I use?   
I ask because I read of 'natural rubber' in older systems or even SBR type rubber from the 70's being not compatible with borate esters in DOT4.  I don't want to ruin a nice NOS master cylinder.  What do you think? 
Rick Lazio
Engine Related Items / Re: SU Linkage Parts
« Last post by JohnTwist on February 14, 2020, 03:21:29 PM »
That body shell is looking VERY nice!

The only two people in the USA that come to mind are:

Joe Curto who is the SU king in the country: and

Paul Dierschow of Sportscar Craftsmen in Denver, Colorado:  CPaul has SO MANY used parts.

Maybe one of these guys has a clue or can point you to someone who can assist.
John H. Twist

Engine Related Items / SU Linkage Parts
« Last post by march2020 on February 14, 2020, 03:13:48 PM »
I am doing a bare metal up restoration of a 1980 MGB Roadster, converting it to chrome and installing an SD1 3500 V8, five speed box and a V8 back axle.  I have a modified SD1 plenum and a matching fabricated inlet adaptor to mount the two SD1 HIF6 carbs, See the photos.

What I am missing at this time is the original factory V8 linkages between the carburetors as these are no longer available.  I see on eBay some linkage bits which I may be able to adapt to suit the twin HIF6 set-up.

Do you know of any source in the USA of SU linkage pieces which I could buy to recreate the original factory V8 set up on the MGB GT V8 with the cast aluminium adaptor, part BHH988?
Jim Barin
Engine Related Items / Re: Engine Identification
« Last post by JohnTwist on February 14, 2020, 03:23:57 PM »
Here are some photos that have information about engine identification.  Here is a bit more:

The three main MG engines have a tach drive at the rear of the camshaft.

The 18GB engine is set for a dynamo, the newer engines also have a set of vertical 5/16-24 threads to accept the rear mount of an alternator. 

The 18V engines use a very different front engine bearing plate and a single row chain and sprockets for the cam.

The 1968/69 rear engine plate has a hole about the size of a silver dollar on the LH bottom.

Hope this little bit helps.
John Twist


Engine Related Items / Engine Identification
« Last post by march2020 on February 14, 2020, 03:14:31 PM »
I bought a 1963 MGB completely dissembled back in June. The previous owner had the motor rebuilt and indicated it was a 5 main engine. I have not pulled the pan to verify. My challenge is determining if it is an 18 GB or 18 GD because there is no engine ID tag. Can you provide some help?

Tom Bishop
Westerville, Ohio
Engine Related Items / Re: Breather Tube to Aluminum Valve Cover
« Last post by JohnTwist on February 14, 2020, 03:28:24 PM »
A;   Drill a pilot hole then follow with a NPT tap into the valve cover exiting the right rear of the valve cover pointed towards the windscreen washer container.  Use a pipe nipple (grind off the excess that protrudes into the interior of the engine so there is no chance of fouling the valve springs).  The inside diameter is much too large for proper ventilation. 

It must be reduced to 5/64.  I found it easiest to use my torch and solder several washers of descending size on the end of the pipe nipple, ending up soldering the pipe shut.  Then drill that 5/64 hole through the solder in the middle of the smallest washer

Use a pipe nipple, it needs not be barbed its a 95 hardware store item.  Thats inside and outside.  Its a taper fit into the valve cover so its tightened VERY snugly.  But, again, grind off the excess that protrudes into the inside of the VC so it has NO chance of fouling the rocker assembly.

Hope this helps.
John Twist
Engine Related Items / Breather Tube to Aluminum Valve Cover
« Last post by march2020 on February 14, 2020, 03:15:41 PM »
I need help regarding adding a breather tube to an aluminum valve cover. The hose connected to it will come from the charcoal canister.

David Braun
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