My question is this, My car has been in long storage. Upon restart a tremendous amount of white smoke was being emitted from exhaust. My center exhaust port headers glowed red. After awhile the smoke subsided. Car will not run without a lot of backfiring unless revs are kept very high. Checked all the normal things, timing, carb, air leaks spark plugs all look good, etc. Overtime I restart car same thing. Could this be caused by leaking cylinder head gasket that is resealing itself upon engine heating up?

20

Asked by Feb 06, 2016 at 09:10 PM about the 1977 MG MGB

Question type: Maintenance & Repair

9 Answers

261,405

How long did it sit? Did you use fuel stabilizer or additives? Did you drain the fuel before starting?

1 of 1 people found this helpful.
20

I drained the gas tank and put new gas in tank. Also cleaned the carb by removing, taking it apart. It isn’t a gas issue.This isn’t a one time event. It always happens when I start engine. Glowing header (center 2 exhaust headers) and it lasts about 5 minutes before it clears up. But still backfires unless revs are very high. Thank you

1 of 1 people found this helpful.
71,655

The glowing exhaust manifold sounds like a stuck shut heat riser, if equipped. HTH. - Jim

20

I do not think I have a heat riser.

1 of 1 people found this helpful.
5,625

No, There is not a heat riser. When you cleaned the carbs, I presume still has 2 SU's, did you make sure pistons moved freely and put machine oil in the reservoirs? You may just have carb problem. Also, in just sitting, you may have a stuck thermostat. (Nothing to do with backfire but should be checked)

82,845

Check your valve adjustment while you are at it. Use a good fuel system cleaner, check the points and set the ignition timing.

82,845

Doing a compression test and re-torquing the head can't hurt.

82,845

Keep in mind that the center exhaust pipe gets twice the heat of the other two.

5,625

Still strange that it gets red hot! Maybe lean mixture. Still think it is a carb problem.

Your Answer

MGB

Looking for a Used MGB in your area?

CarGurus has 86 nationwide MGB listings and the tools to find you a great deal.

ZIP:

MG MGB Experts

  • #1
    Larry Sturgis
    Reputation
    90
  • #2
    wb6epp
    Reputation
    70
  • #3
    Lars Cats
    Reputation
    60
View All

Related Models For Sale

Used Chevrolet Corvette
186 Great Deals out of 18,698 listings starting at $3,941
Used MG Midget
6 listings
Used Porsche 911
146 Great Deals out of 5,043 listings starting at $11,990
Used Triumph TR6
31 listings
Used BMW 3 Series
1,081 Great Deals out of 33,892 listings starting at $1,000
Used Ford Mustang
570 Great Deals out of 36,666 listings starting at $1,500
Used Ford Thunderbird
19 Great Deals out of 1,065 listings starting at $6,998
Used Volkswagen Beetle
206 Great Deals out of 8,618 listings starting at $1,500

Used Cars For Sale

1980 MG MGB For Sale
11 listings
1979 MG MGB For Sale
13 listings
1977 MG MGB For Sale
12 listings

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.