Showing articles & questions for topic
V8-7.4L

Related questions

Question
Choose a carburetor for 454 Chevy engine
Hi there. For the carburetor swap out, you will need to have a least a CFM of 850 or 950 for a big block GM engine. If you are concerned about fuel consumption, then you could do a CFM of...
Question
My dash electric system is shot. Any Ideas what to fix?
Hi There, It sounds like your instrument cluster needs to be replaced. Like many other elements of your vehicle, the modern instrument cluster is electronic, and requires voltage in order to operate. The instrument cluster consumes less power than batteries...
Question
I have a 1979 Chevy 454 big block will it fit in my 1989 chevy
Hi there: In regards to actual fitting issues, it should be good, as long as you use the flywheel that mounted to the original transmission. However, you're most likely going to have issues with fuel system, and electrical systems matching...
Question
Engine seems locked
Hi there. Sounds as if the meter in the carburetor has failed and made the float continues attempts to fill up when it is to be shut off. This will cause the engine to statically lock up. If the carburetor...
Question
Does my vehicle have an oil pressure sender or oil pressure sensor or both and where is it located?
Your motor (454/7.4L Big Block Chevy) should have an oil pressure sending unit that is typically mounted just above the oil filter housing. This is a relatively small unit (about the diameter or a quarter or slightly bigger) with threads...
Question
Trucks pulls to left under braking
If it is in fact the slide pins sticking once again, try a different type of "brake lube" or caliper lube. Sometimes synthetic lubes work better in different climates. I went through a similar situation with my other half's car....
Question
Transmission problems?
If you feel that you are experiencing transmission issues, I would recommend having your truck inspected by a certified professional with experience in transmission diagnosis. If you continue to drive the truck with these issues, they can become worse and...
Question
Motor Oil?
Hi There, Contrary to popular belief, it will not hurt your engine when switching from synthetic to conventional or vice versa. In fact, Synthetic blend oils are actually a mix of conventional oils and synthetic oils. Many synthetic oils are...
Question
there is intake pushrods I broke two of them and bent the rest started to smoke and it smells like fuel what would cause this
Hi there: In most cases, a push rod breaks or bends when there is a gap between the lifter and the push rod tip. This can happen if the valve hardware gap is too wide. Other issues that can cause...
Question
Do I have to remove the upper intake manifold to replace my fuel pressure regulator ?
The fuel pressure regulator on a sequential fuel injection system is inside the intake manifold on this engine and the upper intake needs to be removed for access. Make sure to replace all gaskets and seals when manifold is removed....
Question
Odometer stopped working 1994 Chevrolet K2500
Hello - your truck has a digital instrument cluster. It is possible that either a speed sensor, or something in the clusters electrical components is failing. (These are notorious for failures) There are rebuilders for these clusters who can offer...
Question
Cylinder Head inspection
I would recommend pulling the cylinder heads off to inspect considering 2 of the push rods broke. This may have caused material from the broken rods to be scattered throughout the valve train or potentially other places in the motor....
Question
No spark to coil and module
There are a number of issues that may cause an ignition system to not produce spark. A bad crankshaft position (CKP) sensor (on engines that do not have a distributor), or broken, loose or corroded wires from the sensor...
Question
1998 chevy suburban 2500 4x4 7.4 / 4l80e limp mode?
If the check engine light did come on and the trans went into limp mode, often there will be a fault code stored to shed some light on the problem. The trans fluid level and condition can be checked and...
Question
Dead Battery again
You may have a failing voltage regulator that could be allowing the alternator to supply too much or too little amperage to the battery resulting in the battery never maintaining a consistent charge as it is designed to. The voltage...
Question
Low brake pedal and anti-lock brakes are not kicking in.
The brake pedal is working to stop the vehicle, but there may be air in the controller unit causing the ABS brakes to not function. I recommend bleeding the brake system from the farthest location from the master cylinder to...
Question
Normal operating voltage?
Most vehicles require at least 13 volts to operate properly. Ideal voltage is 13.8 - 14.4 volts. 14.5 volts is completely acceptable and should cause no issues.
Question
shake in the front end
Vibration or shaking at moderate to high vehicle speeds, felt through the car body and/or the steering wheel, is usually due to dynamic imbalance of the wheel/tire assembly and/or various types of tire defects such as belt separations or excessive...
Question
I have a 454 big block chevy suburban 85 c20 rwd and it seems to stall and misfire not allowing me to accelerate or even stop it f
Hi there. Typically when I see this issue on big block chevy engines, the first thing I do is check the distributor first. Verify the cap is not cracked, rotor is good, and the distributor is solidly mounted to the...
Question
Damage to rear Differential? 1994 Chevrolet K2500
Hello - while you are correct that this is not an ideal scenario, I doubt that packing the bearings with a lithium grease like "Red & Tacky" is a long-term issue. Not sure where R&T gets a bad rap as...

Need a mechanic?

Our certified mobile mechanics make house calls in over 700 U.S. cities. Fast, free online quotes for your car repair.

Get a quote

Post a question and get free advice from our certified mechanics.


Ask a question