 |
What causes a tapping noise when starting the engine?In: Car Sounds |
[Edit] |
Answer
I would not be driving this vehicle for a couple of reasons.
If you are loosing coolant on a continual basis, regardless of how much is lost, it has to go somewhere. If you do not see any pooling under the vehicle, then it is leaking inside the engine.
If the latter is true, then coolant in the engine will dilute the oil, and create a cloudy oil residue, or if you are getting oil into the coolant, you will see a 'rainbow' on top of the coolant in the radiator or overflow.
The tapping, I think, from the limited information, is the Valves not getting the Oil due to low oil pressure. Once the engine warms up, and the Oil pump starts to flow the oil, the tapping stops. Many vehicles, especially GM and Chevy do this. I would not be overly concerned about the tapping, but I would be concerned about the coolant leak. An easy way to see if you have an external leak is to go to a local parts store, and purchase a leak test kit, which usually is a dye, which can be seen with a blacklight. Kids love helping at night with this!
Good Luck
Answer
it might be your water punp you need a stronger one. or nr oil too the head
Answer
Adding to answer: Take vehicle to repair facility and have a Carbon Block Test done,it will also determine if Carbon Gases are entering the coolant system.As far as the tapping, switch to synthetic oil,it costs about twice as much but is well worth the expense.
http://www.autozone.com/servlet/UiBroker?UseCase=S001&UserAction=viewSimpleDiagInfo&Parameters=info
answer does the noise go away shortly after starting? if so the tapping noise is caused by cold and insuufient oil in the lifters on your tappets as the engine stands, not running, the oil that was circulating while running, goes to oil pan on starting, the oil needs to be circulated back to all parts, try an oli change with correct viscosity oil sometimes a good oil additive such as LUCAS ENGINE OIL ADDITIVE will stop this rattle all cars will have same problem as they get older
First answer by Mary Zawalick. Last edit by Frmtrkr. Contributor trust: 623 [recommend contributor]. Question popularity: 148 [recommend question]
|
Research your answer: |
Answers.com > Wiki Answers > Categories > Cars and Vehicles > Parts and Repairs > Car Sounds > What causes a tapping noise when starting the engine?
Our contributors said this page should be displayed for the questions below. (Where do these come from ) |
| If any of these are not a genuine rephrasing of the question, please help out and edit these alternates. |
