Author Topic: 1973 MG B  (Read 157570 times)

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Offline BattleHymn

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Re: 1973 MG B
« Reply #550 on: February 14, 2013, 06:05:58 PM »
Is your new damper missing the brass part?  Did you drive it yet?

Also, it looks like a gorilla mangled your Commission No. tag. 


Offline Chris_

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Re: 1973 MG B
« Reply #551 on: February 14, 2013, 06:27:39 PM »
I guess I'm supposed to transfer the brass part from the old damped to the new one.  Good thing it's stuck in the carburetor and not missing.
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Offline BattleHymn

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Re: 1973 MG B
« Reply #552 on: February 14, 2013, 06:30:04 PM »
I guess I'm supposed to transfer the brass part from the old damped to the new one.  Good thing it's stuck in the carburetor and not missing.

Wow, I would have figured you'd get that piece with it.  I wonder what a guy is supposed to do if he loses the whole thing?

Offline Chris_

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Re: 1973 MG B
« Reply #553 on: February 14, 2013, 07:27:05 PM »
I got one of those grabby claw things two Christmases ago.  This will be the first legitimate use I've had for it, other than messing with the cat.
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Offline BattleHymn

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Re: 1973 MG B
« Reply #554 on: February 14, 2013, 07:39:58 PM »
I consider messing with the cat(s) with any tool a legitimate use thereof. 

Offline Chris_

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Re: 1973 MG B
« Reply #555 on: February 17, 2013, 02:21:18 PM »
Took a peek in the trunk this afternoon and noticed what looked like a grounding strap (a pair of black wires connected by a loop terminal at the end) was disconnected from a nearby prong attached to the body.

Interesting.
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Offline Eupher

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Re: 1973 MG B
« Reply #556 on: February 18, 2013, 01:06:05 PM »
Took a peek in the trunk this afternoon and noticed what looked like a grounding strap (a pair of black wires connected by a loop terminal at the end) was disconnected from a nearby prong attached to the body.

Interesting.

Maybe that explains the periodic 12V jolts you get when you hit a bump.

Okay, all right, it ain't a jolt - it's a tickle.
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Offline Chris_

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Re: 1973 MG B
« Reply #557 on: February 19, 2013, 09:24:30 PM »
I haven't climbed under the car to check out the exhaust since I got back from Texas, but someone else with the same problem re-torqued the bolts on his exhaust and fixed his loud-ass car.  Worth a try... it's supposed to be nice this weekend.
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Offline BattleHymn

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Re: 1973 MG B
« Reply #558 on: February 19, 2013, 10:10:36 PM »
What kind of noise is your exhaust making that it shouldn't be making? 

Offline Chris_

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Re: 1973 MG B
« Reply #559 on: February 19, 2013, 10:15:09 PM »
None, it's just extremely loud from the collector pipe back.  I think the exhaust manifold may be loose as well.

It's pretty much been like that since I did 90mph on I-30 through Texas.
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Offline Chris_

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Re: 1973 MG B
« Reply #560 on: February 23, 2013, 11:46:48 AM »
I had to pull the entire plunger assembly out to remove the broken damper.





There's a smaller circlip that came off.  This is not going to be fun. :p
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Offline Chris_

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Re: 1973 MG B
« Reply #561 on: February 23, 2013, 12:04:02 PM »
That was easy enough.  Problem -- I have a part left over. :rofl:

There's a second weight, it's the lighter-colored brass one nearer to the broken end of the post.  There's no way to put it back on with the cap attached to the end of the new damper.
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Offline Eupher

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Re: 1973 MG B
« Reply #562 on: February 23, 2013, 12:27:54 PM »
That was easy enough.  Problem -- I have a part left over. :rofl:

There's a second weight, it's the lighter-colored brass one nearer to the broken end of the post.  There's no way to put it back on with the cap attached to the end of the new damper.

I'll loan you my .45 to put it out of its misery.
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Offline BattleHymn

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Re: 1973 MG B
« Reply #563 on: February 23, 2013, 02:21:33 PM »
That was easy enough.  Problem -- I have a part left over. :rofl:

There's a second weight, it's the lighter-colored brass one nearer to the broken end of the post.  There's no way to put it back on with the cap attached to the end of the new damper.

 
Which part can you not put on?  I've numbered them:



If it's #4, that's the one that prevents #2 and #3 from just floating around in there all over the place.  I suspect #2 and #3 would just move right along with the piston when acted upon by the oil, instead of slowing the speed of the piston, without #4 in place.

Offline Chris_

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Re: 1973 MG B
« Reply #564 on: February 23, 2013, 02:24:35 PM »
There's a fifth part.  Look above 1-4 on my photo.
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Offline BattleHymn

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Re: 1973 MG B
« Reply #565 on: February 23, 2013, 02:32:35 PM »
Ah, I see it now.  I couldn't tell that it wasn't attached to #3.  I'm sure that it is some sort of improvement over the older design, because when my brother ordered two new dampers for his car, they both came with those. 

Offline Chris_

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Re: 1973 MG B
« Reply #566 on: February 23, 2013, 02:39:17 PM »
I seem to have another problem.  The air flow through the rear carburetor is far lower than the front.  The front one is about in the middle on my Unisyn, the rear one barely registers at all.

I may have to pay to have it rebuilt if I can't fix it.
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Re: 1973 MG B
« Reply #567 on: February 23, 2013, 02:41:55 PM »
I seem to have another problem.  The air flow through the rear carburetor is far lower than the front.  The front one is about in the middle on my Unisyn, the rear one barely registers at all.

I may have to pay to have it rebuilt if I can't fix it.

Is this at idle?  I think those draw idle only through one carb.  Let me call my brother, and ask him what he did, because I think he had the same problem.

Offline Chris_

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Re: 1973 MG B
« Reply #568 on: February 23, 2013, 03:52:54 PM »
Got it.  My idle screws were set wrong.  I got them pulling the same amount of air, now I have to check my fuel mixture.
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Offline 17 Oaks

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Re: 1973 MG B
« Reply #569 on: February 23, 2013, 05:52:28 PM »
I looked at some 912's... I even considered flying out west to pick one up, but they were out of my budget.  I'm really happy with the MG other than it is not really a daily driver, at least not unless you lift weights for a living or live really close to work.  A 45-minute commute in this car is not going to be fun in the long term, but that's not why I bought it.  I drove this thing to a dozen different stops and back home yesterday and was wore out.  By the time I got home, my armpits hurt.

I did not own a car with AC or PS until `974, never knew what I was missing :rofl:


Do your SU's use oil?  I have a '58 MGA with twin SU's and I had to fill them with oil, Used 40 wt in the summer (Texas) and 20 weight in the winter...?
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Offline Chris_

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Re: 1973 MG B
« Reply #570 on: February 23, 2013, 05:53:41 PM »
I'm using 20w50 motor oil.

:banghead: Still running lean.

I'm going to forget about the carbs for now.  I have to take them off to get to the intake manifold bolts, so I'll be messing with that tomorrow along with the rest of the exhaust.
« Last Edit: February 23, 2013, 06:13:24 PM by Chris_ »
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Offline Chris_

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Re: 1973 MG B
« Reply #571 on: February 24, 2013, 11:51:45 AM »
Got the carburetors and heat shield off.  At least now I can access the oil separator cover.  I ordered a set of gaskets, but the ones I was sent were labeled for a 2-barrel Ford.  Crossing my fingers.

My headers look good... no cracks, no obvious separation around the manifold, and the bolts are snug. 
If you want to worship an orange pile of garbage with a reckless disregard for everything, get on down to Arbys & try our loaded curly fries.

Offline BattleHymn

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Re: 1973 MG B
« Reply #572 on: February 24, 2013, 12:19:37 PM »
This is probably a dumb question, but with you running lean, have you made sure you don't have any leaks between the SU bodies and the intake manifold? 

Offline Chris_

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Re: 1973 MG B
« Reply #573 on: February 24, 2013, 01:30:18 PM »
Haven't got that far yet.

No gunk at the bottom of the float chamber, but my floats were way off.  I got them adjusted and will put them back on after I re-check the exhaust and clean the oil separator.

« Last Edit: February 25, 2013, 12:35:28 AM by Chris_ »
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Offline Chris_

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Re: 1973 MG B
« Reply #574 on: February 24, 2013, 01:48:32 PM »
I think my needle valves/seats are shot.  They're both collapsed and not springing back like these are.

[youtube=640,480]http://www.youtube.com/watch?v=vPCfwkIdWpc[/youtube]
« Last Edit: February 25, 2013, 12:40:03 AM by Chris_ »
If you want to worship an orange pile of garbage with a reckless disregard for everything, get on down to Arbys & try our loaded curly fries.