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1978

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Question
Overheating way to fast
Hello. If the engine overheats this fast then you should do a block test. This sounds like a blown head gasket or a cracked head. When this occurs combustion pressure enters the cooling system and causes this to occur. I...
Question
I have a minor oil leak, Unsure of the cause
Hello. Without seeing the truck, it may be tough to tell. However, judging by the location of drops of oil it sounds like you may have a valve cover gasket leak which is a relatively easy and cheap fix. I...
Question
Interior and parking lights stay on after car has been turned off - 1978 Buick Electra
Hello. If these lights will not turn off then it is usually in the light switch. This switch can fail internally and cause this. It can also be the ignition switch, but most of the time you will also have...
Question
Charning issues, new battery and alternator
Hello there. There are a few potential causes for why the car would have charging faults even after the alternator is replaced. The most common would be the battery cable, shorted harness, battery, or a failed alternator. The first thing...
Question
Not getting gas to the carb
Your symptoms are a bit in conflict. One comment suggest that there is no gas getting to the carb - in which case it should not run at all. Another comment indicates that is runs, but won't idle - and...
Question
Coolant leak from a black box (HVAC box)?
The most likely cause of your leak is the heater core inside of the car's heater case. The leak will come out of the A/C's drain. If you are going to bypass the heater core then I would recommend connecting...
Question
I've got a stock 350 with an edelbrock 1406 carb I just put on that I bought used. It has a dead spot in the accelerator so I chan
Hello. From what you describe it would appear that the carburetor may need to be tuned or adjusted. Every engine runs differently, so in most cases, when a new or different carburetor is installed on an engine it will need...
Question
Replacing rear drum brakes with a new rear drum brake kit.
Hello. If you are replacing the entire rare bakes as a set up, which is sounds like, then yes, the axle will need to come out. this wold be the only wat to remove the backing plates. Once the axles...
Question
Shutting off and difficult startup - 1978 Jeep CJ5
Hey there, thanks for writing in. It sounds like you may have a large vacuum leak. Ensure the PCV system is hooked up correctly and that there are no broken or damaged vacuum lines. A smoke check of the induction...
Question
My car's key turns but doesn't come out. My car will not crank either. What is the problem?
Start by gently wiggling the key to the left, the right, upwards, and down. If the key is damaged or bent, you will have to compensate for that damage in order to remove it. The lock's cylinders can collect dirt,...
Question
Key won't turn in the ignition 1978 Ford Mustang II
Hi there - there a couple of possible faults preventing your ignition key from turning in the ignition lock cylinder. First is that the key is sufficient worn, or the lock tumblers themselves, that they are simply not moving the...
Question
The transmission slips gears and the car has no kick down
If the transmission is slipping, then the vehicle will seem to not accelerate, or the vehicle will not move very fast. It seems that there could be an issue with the transmission that is causing the slippage. Check the kick-down...
Question
My Ford cortina has just cut off while driving and I suspect my points because there is no spark
Hi there. Wow, points and condenser! I have not heard those words in several years. Not sure if, your vehicle is equipped with standard ignition. The change over to electronic ignition started in 1974. Assuming, your vehicle has standard ignition....
Question
COOLANT LEAK 1978 Lincoln Continental Mark V
Hi - I believe you have a leak in the heater core - the tiny radiator under the dash (inside the big black plastic box you mention) that converts hot engine coolant to heat for the passengers. There is no...
Question
Differential ratio
You should not mix different axle ratios or there may be damage to the components in the 4x4 system. If front drive shaft and rear drive shaft turn at different speeds then damage inside transfer case gears can happen. Most...
Question
Power drain 1978 Cadillac Seville
Hello - you may have a charging system problem, although you have replaced virtually of those components, or there may be a parasitic drain on the system that runs your batter down overnight. This can be diagnosed by identifying which...
Question
I am replacing my power brakes booster and need some advice about removing the power unit from the bell crank.
Hi there. When removing the brake booster from a vehicle, you will need to remove the master cylinder and cap off the hydraulic lines. Then go in the cab and remove the pin from the bell crank and unbolt the...
Question
Vehicle starts sometimes, but dies and won't restart.
To clarify, the year (1978) of the Chevy Suburban in question you are asking about refers to some EFI terms that a vehicle of this year would not have otherwise come with from the factory. The answer below assumes this...
Question
Ignition/lock cylinder.
Hi there. After removing the steering wheel and getting to the turn signal switch cam, remove the snap ring from the steering column shaft and pull off the housing for the horn button. Then unclip the turn signal switch cam...
Question
Ticking and knocking sound and follows as the rpm's increase.
I would have to listen to the noise firsthand to know for certain. However, one guess is that the noise you're hearing is from the valvetrain. Valvetrain noise, such as worn lifters or misadjusted valve clearance, is generally characterized by...

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