Classic Car

Have classic car questions? Ask an Expert.

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

My 1970 dodge superbee leaks gas out of vent line on hot…

My 1970 dodge superbee...

My 1970 dodge superbee leaks gas out of vent line on hot days or when I fill up the gas tank

Mechanic's Assistant: When did you last fill the tank? And do you smell gasoline around the engine?

Same day last sat going to a car show only leaks out under rea rend when full or if build up pressure in the tank.

Mechanic's Assistant: What is the model of your '70 Dodge?

Super bee 1970

Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far?

Yes

Show More
Show Less
Ask Your Own Classic Car Question
Answered in 6 minutes by:
11/21/2017
Classic Car Service
Classic Car Service, Classic Car Mechanic
Category: Classic Car
Satisfied Customers: 5,239
Experience: ..................
Verified

Hello. Welcome to Just Answer. Pleas allow me to assist you. I have had this issue with several vehicles from that era. I would recommend, before you do anything else, to replace the fuel filler cap with a proper replacement unit. Not something cheap from an auto parts store that fits a lot of different vehicles, but an original specification cap. The caps on these older cars are vented. New cars do not vent the caps. If the cap is faulty, the pressure in the tank builds up on hot days and is fuel is forced out.

Ask Your Own Classic Car Question
Customer reply replied 9 months ago
supposed to use a non vented cap it has two vent lines

If you have vent lines then one of the rubber hoses is collapsed where it meets the tank connection.

Ask Your Own Classic Car Question

Older cars had vented caps. My Charger had a vented cap. Apparently yours is different.

Classic Car Service
Classic Car Service, Classic Car Mechanic
Category: Classic Car
Satisfied Customers: 5,239
Experience: ..................
Verified
Classic Car Service and 87 other Classic Car Specialists are ready to help you
Ask your own question now
Phone call session started
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a classic car mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Classic Car Service Your Own Question
Classic Car Service
Classic Car Service
Classic Car Service, Classic Car Mechanic
Category: Classic Car
Satisfied Customers: 5,239
5,239 Satisfied Customers
Experience: ..................

Classic Car Service is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

CharlesWalnut Creek, CA

As a single woman, I really appreciate an excellent and affordable opinion.
Thank you Geordie, I will not hesitate to contact justanswer in the future!

SueCharleston, WV

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

JimCastleberry, FL

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

< Previous | Next >

Meet the Experts:

Dr. Hamman

Dr. Hamman

Technician

2,436 satisfied customers

I have 30 years experience repairing, restoring, and customizing cars, and pickup trucks.

Don - Mo Lurch

Don - Mo Lurch

Classic Car Mechanic

957 satisfied customers

Heavy Line Mech-, Mobile Electronics. Sales, Installation & Repair for 30 years. R/S, etc.

Don

Don

Classic Car Mechanic

951 satisfied customers

30 years of experience and we have 4 classic cars our selfs

Mike S.

Mike S.

Classic Car Mechanic

880 satisfied customers

A.S.E. certified with 25+ years experience.

K. Wiggins

K. Wiggins

Classic Car Mechanic

431 satisfied customers

ASE Certified Technician, Associates Degree in Automotive Technology, 15+ years in the trade

Dave Nova

Dave Nova

ASE Technician

415 satisfied customers

ASE Master Certification. GM World Class Certification

Road Side Jerry

Road Side Jerry

Auto Mechanic

280 satisfied customers

classic car mechanic

< Previous | Next >

Related Classic Car Questions
I have a 1970 Dodge Charger with a 440 and I have a problem
I have a 1970 Dodge Charger with a 440 and I have a problem with it vapor locking, when I drive it it is fine for a few miles then when I am at idle and just cruising in after a few minutes it will die and I have to wait for about a hour or so and it will run fine but after it dies it will crank if apply the gas but won't idle it will just die . It has a mechanical pump and I was wondering if I added a electric fuel pump if that would solve my problem? … read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
I have a 450 slc 1978 and I think I may have a vent valve
hi I have a 450 slc 1978 and I think I may have a vent valve problem Where is it located? … read more
rpmdiag
rpmdiag
High school
7,881 satisfied customers
I have a 75 ranchero and having problems with the gas
I have a 75 ranchero and having problems with the gas leaking out from the gas cap when driving. I have tried 6 different caps and they all leak out. I was wondering if the vent valve might be causing… read more
Don - Mo Lurch
Don - Mo Lurch
Classic Car Mechanic
Vocational, Technical or Trade Scho
957 satisfied customers
buick LeSabre: I have a 1962 buick LeSabre . my gas gauge has
I have a 1962 buick LeSabre . my gas gauge has quit working it is stuck on full all the time now so im always topping it off. I have had this car around a week now and was sold as is. but now when the… read more
fordguy4u
fordguy4u
Automotive Tech
Vocational, Technical or Trade Scho
70 satisfied customers
Ford F250 Pickup 4x4:(NNN) NNN-NNNNfordXXXXXtwo gas tank
(NNN) NNN-NNNNfordXXXXXtwo gas tank front an rear. When using the rear tank, front tank will push gas out were you fuel up. 2. when you use the front tank after period of time the truck will start to … read more
Dr. Hamman
Dr. Hamman
Technician
Vocational, Technical or Trade Scho
2,436 satisfied customers
Chevrolet Camaro SS: How many hours labor should I be charged
How many hours labor should I be charged for new fuel lines, pump (Walbro 5CA 400), and pressure test? and to lube the front suspension?… read more
K. Wiggins
K. Wiggins
Classic Car Mechanic
Associate Degree
431 satisfied customers
Chrysler Newport: I have a gasoline leak near the gas tank
I have a gasoline leak near the gas tank in my 1966 Chrysler. The leak only manifests itself after driving the car, and so far I have only noticed it on warmer days. Yesterday after I parked the car i… read more
roy
roy
Associate Degree
3 satisfied customers
dodge coronet: ride..vent..I changed the gas cap and the car ran
Hello, yesterday I took my dodge coronet 1970 with a 318, points and condenser to a ride, everything was great when suddenly it seem like we ran out of gas!, the engine started to stall, and shuttted … read more
Dr. Hamman
Dr. Hamman
Technician
Vocational, Technical or Trade Scho
2,436 satisfied customers
87 El Camino: fill pipe; shuts nozzle..fuel injection..vent
When filling my '87 El Camino, Gas backs up in the fill pipe; shuts nozzle off every 2/10 gallon. Have new 22 gallon tank for fuel injection. Pump, float, vent & return in tank fitting. This happen mo… read more
Dave Nova
Dave Nova
ASE Technician
Associate Degree
415 satisfied customers
electric fuel pump..flow of fuel be constant or sporatic..tank is full
When a electric fuel pump or mecanical fuel pump is pumping,should the flow of fuel be constant or sporatic? If it is sporatic but not supposed to be,what would the problem be? THe tank is full. Can y… read more
Mike S.
Mike S.
Classic Car Mechanic
Vocational, Technical or Trade Scho
880 satisfied customers
1970 eldorado: pouring..passengers side door..flow..fuel line
Hello I have A 1970 Eldorodo Ran out of fuel and we poured enough to get to a pump and we poured fuel about 50.00 worth and when we realized it was pouring out below the passengers side door underneat… read more
Mike S.
Mike S.
Classic Car Mechanic
Vocational, Technical or Trade Scho
880 satisfied customers
65 Mustang: gas cap blows..radiator leaks only at this time..fuel tank
I have a 65 Mustang and the gas cap blows out of my hand when opening after a few hours of driving indicating to me the gas tank or cap is not venting. It also wants to quit often...act like it is run… read more
Don - Mo Lurch
Don - Mo Lurch
Classic Car Mechanic
Vocational, Technical or Trade Scho
957 satisfied customers
1968 Oldsmobile 442: convertible..issue coming from the fuel tank
I have a 1968 Oldsmobile 442 convertible W-30. I am currently having a fuel venting/leaking issue coming from the fuel tank. Do I need to be using a vented or non vented gas cap? There are the 2 vent … read more
AutoDoc
AutoDoc
Shop Owner
Bachelor's Degree
1 satisfied customers
execute: 1970 turbo 425 that drives and shifts proper.but..leaking
i have a 1970 turbo 425 that drives and shifts proper.but its leaking trans fluid from the vent.what can you tell me?i can understand and execute any needed procedures,i have had eldos n toros since i… read more
LoverofClassics
LoverofClassics
High School or GED
6 satisfied customers
1970 Chevy: missing or quick sputter at idle...timing..Vacuum leak?
1970 Chevy 350 has sudden onset of missing or quick "sputter" at idle...timing? Plugs and wires? Vacuum leak? Bad gas? Is there any way to tell or go through each one?… read more
Rick Armour
Rick Armour
Car Restorer
Vocational, Technical or Trade Scho
286 satisfied customers
I have a 66 mustang that wont keep fuel pressure at the carb
I have a 66 mustang that wont keep fuel pressure at the carb for more than a few minutes. Ive tried running a new line, flushing the tank, electrical fuel pumps, and mechanical fuel pumps, new filters… read more
Road Side Jerry
Road Side Jerry
Auto Mechanic
Vocational, Technical or Trade Scho
280 satisfied customers
1970 chevelle ss: driven..run fine..flooding itself..dies
i have a 1970 chevelle ss completly restored ground up the motor looks like new. Until the last few times it was driven (which was very little) it has run fine other than the normal twichs ,etc that a… read more
Roadsofa
Roadsofa
Owner RJ's Performance
Vocational, Technical or Trade Scho
64 satisfied customers
1970 dodge: information on removing the gas tank..nasty gas leak
Do you have information on removing the gas tank of a 1970 dodge super bee? I have a nasty gas leak thats pretty smelly. Thanks for your help.… read more
Road Side Jerry
Road Side Jerry
Auto Mechanic
Vocational, Technical or Trade Scho
280 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x