Hi there. Unfortunately, there are multiple components that could cause your Toyota Sienna to not start; especially after an overheating issue. You might be better served to consult with a local mechanic that can come to your location and complete a car is hard to start inspection.
How to Identify and Fix Common car Problems ?
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If the engine will not crank then the starter circuit needs to be tested to see if there is a wiring issue. If it is cranking and not starting then the computer needs to be checked with a scan tool to see if it is getting a crank signal from the crank sensor. If not then it may be a sensor or circuit problem.
Pull the plugs and disconnect the fuse for teh fuel pump. Turn the engine over with the starter until the oil pressure light goes off or at least about 30 seconds. put the plugs and fuse back in and start the car, let it idle for a few minutes to get to temp. Check for leaks, let the car warm up.
A car can start if the head gasket is blown, but it can also not start. It depends on how the gasket blew. Overheating of the engine can cause warpage in the block or head or both. The warpage is just enough for the gasket to give out.
It`s important to check components like the radiator and the water pump, as well as the coolant itself (which may have become contaminated). A problem with one of these could lead to an overheating engine, even after a head gasket replacement.
How long does it take to fix a blown head gasket? Replacing the gasket can take anything from six hours to a few days, depending on the severity of the failure. A blown head gasket is one of the biggest failures your car can suffer, and to fix it properly takes time.
Many mechanics believe that 4 hours of cure time is sufficient to return a vehicle back to service when using silicone gasketing products. There are gasketing formulas that allow an immediate return to service, such as Permatex The Right Stuff®. However, most gasketing products require 24 hours of cure time.
What to Do When a Gasket Blows. If you`re driving and suddenly notice a misfire — or the engine sounds funny — pull over and stop the car. Driving with a blown head gasket is an easy way to make things worse. It`s best to have your car towed to a mechanic to investigate the part`s integrity.
Yes if the leak isn`t too bad. You will need to keep check on your oil level. Yes you will have a vacuum leak depending on the severity of the bad gasket! It could cause a rough running engine!
I know folks who used it and they are driving there cars for years.. so you have to weigh the risks and the worth of the vehicle. But no, cannot put it in if it won`t start.
You can still have a blown head gasket but no evidence of coolant mixing with oil or the “milky” white oil. That`s because the head gasket can fail in a way that only allows the coolant to get into the combustion chamber, leak to the outside of the engine, and never mix with oil.
The short answer is yes. Head gasket sealers can temporarily fix a leaking head gasket, but they`re not a permanent solution. These products last a little while and can only do so much; eventually, the wear and tear will need to be dealt with for your car to run properly again.
Depending on how severe the leak or perforation is, a car usually does not last longer than a month with a blown head gasket.
Engine knocking or stalling starts when valve cover gaskets fail to separate the valve cover and cylinder head. As a result, the engine takes some time to start due to fuel loss.
The purpose of the valve cover gasket is mainly to keep oil from leaking out of the cylinder head area during operation as oil is circulated up through the valve train. This should not impact the car`s ability to start.
Although valve cover gaskets don`t necessarily need sealers or cements, it`s a common practice to glue the gasket to the valve cover. There are a number of sealant choices, too. For this application, Permatex No. 1, RTVs or Permatex High Tack gasket sealant work well.
Engine codes
If you see error code p0300, it points to an issue with your head gasket.
I know folks who used it and they are driving there cars for years.. so you have to weigh the risks and the worth of the vehicle. But no, cannot put it in if it won`t start.
Loss of power or difficulty accelerating, often alongside other symptoms such as white smoke from the exhaust and low coolant levels, can be a symptom attributed to a blown head gasket.