Why do you hear a valve tap when you start your car when its cold?
Because the oil has settled to the bottom of engine, colder weather causes oil to thicken,and it takes a minute to circulate back up to the rest of the engine,causing a light lifter tapping sound. let it idle for a few minutes before driving.
If it persists after warm-up, you may need new lifters (and, possibly, a new cam) or an oil additive, although you need to consider the age of the engine, and the dealer's recommendations. I would not try to adjust lifters (if they are adjustable, which most are not), unless you have adjustable lifters and you can prove that the adjustment has drifted due to a loose nut. You can prove that by checking the torque on the nut and the range of quietness in the adjustment - one full turn is the normal range of adjustment - if you have a narrow range, put the adjustment back where it was. Please, consult the shop manual or a qualified mechanic before starting something like this.
If a car won't start in cold weather it is possible that the valve guides have been worn. This often happens in cars that have been using ethanol as a primary fuel. Read More
Yes, usually when it is cold and needs more fuel to start. If the valve is hung open, exhaust floods the cylinder. Read More
A car that is working properly should start the same regardless of cold. Read More
I have the same problem with my 98 sc1. After the car is warm I disconnected the Idel Air Valve Wire, the service engine light come on but the car didnt have the high idel problem. (the idel air valve also control the cold start "choke" you have to have it connected or it might quit from low idel and for your car to cold start the next day) I replaced the Idel Air Valve… Read More
You will hear valve train clatter. Read More
The cold weather makes it harder for the battery to provide amperage to start the car. Read More
warm start is when your car has already been started an is hot, a cold start is wheen you have just started the car for the first time of the day, or month.... Read More
1981 Nissan 280zx what else can you check besides mass air flow sensor distributor timing and poidle air sensor the car still pops and sputters when you start it until its warm has loss of power?
Ther is a cold start fuel valve on the intake that maybe malfunctioning. The value is open during cold start. Check wiring. The Haynes manual for the 1981ZX has procedures to test this valve Read More
batteries are rated by their number of cold cranking amps or CCAs the battery you have in your car is either bad or does not have enough CCAs to start a cold engine Read More
Would this cause the car not to start If the EGR VALVE is bad Read More
How will you start the car without keys Read More
Right corner of the air manifold, you can hear it breath when the car is running. Read More
faulty control valve on heater or air in the lines Read More
What does it mean when you try to start your car and it makes the sound you hear when you try to start a car that's already started?
Starter or flywheel problem. Read More
Its the starter or celenoid Read More
start the car and pull the PCV valve out of the valve cover and put your finger over the end of it and see if you feel it sucking. Read More
It is not so much hard for a car to start when the engine is cold as it is easier for a car to start when the engine is warm.Cars that are hard to start in the cold are usually not new cars any more and because of wear and tear there is more likely to be something that doesnt work as well. when fuel is warm it ignites more easily. Read More
Start and stall out, possibly. Not start at all, not likely. Read More
Yes you CAN start your car w/o the exhaust manifold mounted.....However, if you do, you are VERY likely to crack a valve. Your exhaust system protects the valves from cool air contacting a hot valve. Read More
Because the gap between the rocker and the valve is too big and what you hear is the rocker slapping the valve stem. Get yourself a manual for your car and find the valve gap so you can adjust them properly. Read More
if you try to start the car and it does not start and you hold it in the turn on position do you hear a noise like gears running if so you need a new starter 135 at auto-zone is what i paid for mine but if you don't hear the noise it could be the solenoid Read More
if you get to get gas the car has hard time to start Read More
Why does the car shake and once turned off when its cold like in the morning or after work but not when it has been running?
The car shakes because your engin has been cold and you sudenly start the car it will shake Read More
Yes, that is how you know that the battery is "strong" enough to start your car in cold weather. A battery in warm weather may have enough amps to start the car fine, but in cold weather, it wouldn't be able to crank it fast enough. A car battery efficiency drops off the colder it gets. Read More
No. the valve seal basically keep the oil that's on the head from running between the valve seat and the valve. If the valve seal is bad you'll usually see smoke when you first start the car . ( your burning off the oil that wept down into the cylinder over night. Read More
around 30 or 40 Read More
Yes if ur car has many or some sort of engine problems Read More
at the beginning it will be cold, but it will warm up as you start driving Read More
try checking your battery usually it is the lack of cold cranking amps Read More
Your 1990 Geo Prism wont start when it is really cold outside but it will start fine when it is warm you had your car checked and the battery is new and they said the starter and alternator is fine?
battery check.....did you get a battery with enough chranks per cycle????? really need more info. 1. cold weather and you turn the ignition. did you hear anything from the starter???? 2. are the lights working when the car is off and cold. 3. you could be in a place like MN and need an engine warmer... sorry dude or dudet you need more info..... Read More
If the egr valve was stuck open, the engine wouldn't idle. If the egr valve was stuck closed you may hear excessive pinging (spark knock) and in most vehicles, the check engine light would illuminate. Read More
What is wrong if your Mercedes 280sel will not start and you do not hear any sounds from the car when you try to start the engine?
Clean the battery cables first. Read More
the neutral safety switch is thrown Read More
Battery is dead, wires are loose or corroded, or starter is defective. Read More
CHECK YOUR OIL LEVEL Read More
Is it a lifter ticking? Read More
Need more information like year, make, model and engine of car. Read More
A car may take longer to start in extreme cold, especially if it has an older, weaker battery. In any temperature, a car will take longer to start if it has a dying battery. Read More
Saturns don't like the cold. Keep your battery in good condition and try to garage it. Read More
it usually means the the EGR valve needs to be replaced. If your car is "bucking" on start up then for sure it is the EGR valve. Read More
You can not start your Mercedes Benz car when engine is hot however it easily start when engine is cold?
Yes the reason for that is because the engine is over heated and when its cold the engine is nice and cold perfect for starting conditions. Read More
Your car smokes from the exhaust manifold area and tailpipe when the car is cold or been sitting up for a hour?
The cause could be worn valve guides. As the engine cools oil can seep down through the valve guides around the valve stems and collect in the head and top of the cylinders to be burned off when the engine is started. Read More
Did you hear about the tight end who went to prison? He came out a wide receiver Read More
you'll hear a constant clicking noise with no motor rotation, or you'll hear nothing at all Read More
Yes. I have a difficult time starting my car in cold weather. I took the car to the mechanic and he said that frost can cover the bad spots on the starter and this makes it hard to fire. While you attempt starting the vehicle multiple times a good spot is finally found on the starter and this is why you are finally able to start the car. On really cold days it has taken… Read More
The size of the engine does not matter. If one car has the CCAs or cold cranking amps to start your car it will and chances are it has more than enough Read More
How do you adjust valve lash on the exhaust valve form start to finish have no compression on hole cylinder 5 was told it could be this attempting to achieve 1988 XJ6 Jaguar?
no compression on cyl 5 is real come. bad exhaued valve or one of two spring have broken. have two car i am working on right now. run grated cold at mead temper it start to miss only .both car had valve job before to. adjusting valves need lotes shimes and tools and filer gagues and lotes of time . if you never done one its not some then left up to dealer one misstake… Read More
No Egr (exhaust gas recirculation ) is to help better fuel economy Read More
Possibly a fuel line or clogged valve Read More