Engine problems

Top problems

Buzzing with the engine turned off

Chevrolet Optra 2011  64000 miles
With the engine turned off and the switch opened, a buzzing can be heard on the left side. It is similar to the noise cicadas make and, to listen to it more clearly, you need to open the hood. I think the noise appeared after the engine was cleaned. What can it be?
ferdinando92 from United States 5 years ago  
FE
artelepsa de United States 4 years ago
The sound might be coming from a contact or fuse that got wet when cleaning the engine. Try driving the car for some days so that the water that might be present evaporates completely. If it does not disappear, you should take your car to be checked thoroughly.
0
Reply
Comment

Check Engine indicator SolvedSolved

Chevrolet Optra 2005  141300 miles
My Optra 2005 needed to be repaired because the timing belt was broken and some valves were twisted, among other problems. Some days after this big repair, the engine light (MIL-check engine) turned on, but the car continued working without any failures. What might be happening? Thanks in advance for your help.
theophilus from United States 4 years ago  
TH
Best answer (according to theophilus)
dacey de United States 4 years ago
You should check the hose that goes from the air filter to the throttle body. It takes a sensor which is usually left loose; connect it and reset the computer. Good luck.
1
Reply
theophilus de United States 4 years ago
Hi! Effectively, this weekend whe checked the hose, adjusted it and the engine light has not turned on again. The car has been working perfectly. Thank you very much!
0
Reply
Comment

Tappets noise or intake manifold problem SolvedSolved

Chevrolet Optra 2009  134980 miles
A noise similar to the one tappets make has recently appeared on my vehicle. Should I replace them? Can it be the intake manifold that is failing?
effy from United States 5 years ago  
EF
Cally de United States 5 years ago
I recommend you to first remove the engine crankcase and give maintainance to it and also to the intake manifold. If you use Castrol oil, the chances that it is the tappets that are failing raise considerably.
0
Reply
Best answer (according to effy)
effy de United States 5 years ago
The tappets are hydraulic, so they do not need any kind of adjustments. When they are damaged, they sound because they do not fill with oil, creating some clearance between them and the crankshaft. When I had this noise, the problem was found in the intake manifold, which can vary the length of its intake tract in order to optimise power and torque. Inside it, there are some gates in charge of canalizing the intake according to the engine revolutions. In my case, one of them was failing, producing the noise similar to the tappets failure. Hope my experience helps you.
0
Reply
Maikgatlho de South Africa 4 years ago
My chevro[et optra has problem of jagging when heat up and start to lose power. What could be the problem
0
Reply
Comment

Overheating SolvedSolved

Chevrolet Optra 2009  118000 miles
Good night, I would like to share my case with you. Some weeks ago, after driving around 25 miles at 75 mph, I stopped when passing by a police check and the air compressor turned off. Two minutes later, it started working again. This failure was repeated 4 times in the same week. The fifth, I noticed an engine temperature increase. When checking, I noticed that there was a small leakage in the plastic connetion that leads to the thermostat. A copper junction was installed and the missing refrigerant was added. The temperature sensor never reached 100%, I always stopped at 75%. The failure con… Read complete
CHESTER from United States 5 years ago  
CH
dacey de United States 5 years ago
Hello, probably your thermal expansion valve is damaged. Any air conditioning technician should be able to solve this problem without charging you too much. Good luck.
0
Reply
Best answer (according to CHESTER)
CHESTER de United States 5 years ago
Thank you for your comment. I would like to share how I solved it. Even though the car always had refrigerant since leaving the agency, the radiator was too dirty. It was cleaned but it was necessary to replace the superior and inferior tanks because they were considerably obstructed. Even more, the refrigerant reservoir was replaced as it was left useless after moving the hoses so much. Luckily, the car started working properly again. Thank you very much.
0
Reply
Comment

Overheats when accelerating SolvedSolved

Chevrolet Optra 2007  177000 miles
One day, the air compressor suddenly stopped working. When I noticed that the temperature was almost in hot, I stopped, turned off the engine and waited. However, when returning home, the vehicle overheated again. The following day, I changed the thermostat but the failure is still there, it warms up more than it should. The fans are working full time and it is when accelerating on long roads that the vehicle overheats, not when I am stopped. I personally believe it is the pump that is failing but do not know how to check it. Hope you can help me.
bertie from United States 5 years ago  
BE
Best answer (according to bertie)
emmie de United States 5 years ago
Check the water pump, its impeller might be worn. Clean the radiator as well.
0
Reply
bertie de United States 5 years ago
You were right, emmie. The mechanic checked it and told me it the water pump was damaged, the impeller was released and almost broke the belt. He replaced it and the problem was solved. Thank you.
0
Reply
Comment

Starting SolvedSolved

Chevrolet Optra 2006  300 miles
Hi everyone. This is what happened to my car. Two days after repairing the whole engine, the hold light started blinking on the dashboard and the battery got damaged. I changed the stop neutral sensor myself and removed the battery for it to be repaired. When installing it back, a noise of a short circuit was heard, even though there was no smoke coming out from nowhere. Since that moment, speeds have no longer been indicated on the dashboard and the car has not started working again. Even though the engine starts running, it won't finally turn on. I've already changed the crankshaft sensor but with no positive results. Hope you can help me solve the problem, thanks.
SUE from United States 5 years ago  
SU
SUE de United States 5 years ago
The problem was in the computer.
0
Reply
Comment

Type of oil

Chevrolet Optra 2007  126600 miles
Good morning. Yesterday I bought an Optra Design 79000 miles and I wanted to know if it is recommendable to change the timing belt. I would also like to know which kind of oil this vehicle requires. Thank you in advance for your help.
cille34 from United States 5 years ago  
CI
Cally de United States 5 years ago
Every time you buy a vehicle that is not new, it is advisable to change the timing belt, as well as its pulley and tensor. Regarding the oil you should use, the best thing is to ask the previous owner the oil he chose as it is characteristic of each car and you should not be trying different oils.
Cris de Canada 3 years ago
At how many km should the timing belt be changes? Aceos at 100k but optra not sure
0
0
Reply
effy de United States 5 years ago
I wanted to mention to you that this kind of oils are made up of a mixture of synthetic and mineral. You need to take into consideration that you can change from a semi-synthetic oil to a mineral one, but you cannot change it if your car has already used synthetic. This has to do with the maximum viscosity of each type of oil, which determines the free space between the pistons and the cylinders.
0
Reply
cille34 de United States 5 years ago
Thank you for your answers. I asked the previous owner and he told me he used 20 40 mineral, should I continue using this or change it?
0
Reply
effy de United States 5 years ago
Hello, try changing to 15W-40 and checking that there is no oil leakage. With this oil, you should notice that the vehicle is more efficient when starting it in the mornings. In my opinion, Loba is one of the best lubricants available.
0
Reply
Comment

Check Light

Chevrolet Optra 2008 tec II 63000 miles
The check light is always on whenever I start the engine.
Gabriel from Nigeria 2 years ago  
GA
Comment

How To Start My Car

Chevrolet Optra 2010 1.6 4 gears Automatic 40000 miles
Dear Fellows !
Some Water Felt In My Bounet And Engine Some How. Car Is Not Starting ?
Ignition Lights Are Fully On
Car Takes Self But Is Not Starting
Goody from India 4 years ago  
GO
Comment
Problems with a Optra? Share them
Submit commentCancel
Submit replyCancel

Do you like StartMyCar? Follow us on Facebook


Did you find the website helpful?

Thank you!