Exception in rendering!

Message: window is not defined

ReferenceError: window is not defined
    at new c (/tmp/execjs20161208-80463-7kkp0js:136:3912)
    at m.mountComponent (/tmp/execjs20161208-80463-7kkp0js:47:15602)
    at /tmp/execjs20161208-80463-7kkp0js:49:31860
    at a.r.perform (/tmp/execjs20161208-80463-7kkp0js:47:12503)
    at Object.a [as renderToString] (/tmp/execjs20161208-80463-7kkp0js:49:31821)
    at r (/tmp/execjs20161208-80463-7kkp0js:50:21164)
    at Object.S.ReactOnRails.serverRenderReactComponent (/tmp/execjs20161208-80463-7kkp0js:32:6073)
    at eval (eval at <anonymous> (/tmp/execjs20161208-80463-7kkp0js:173:8), <anonymous>:10:23)
    at eval (eval at <anonymous> (/tmp/execjs20161208-80463-7kkp0js:173:8), <anonymous>:17:3)
    at /tmp/execjs20161208-80463-7kkp0js:173:8

Q: Knocking noise coming from engine

asked by on

Ok my car has a loud knocking noise coming from it I was told I need a new engine

My car has 179000 miles.
My car has an automatic transmission.

A: Hi and thanks for contacting YourMechanic. ...

Hi and thanks for contacting YourMechanic. If the engine runs okay and has a little vibration with a loud knocking noise, and the oil pressure is low at idle and high when above idle, then you have a rod knocking from a failed or burned rod bearing. If this is the case, drain out the oil and remove the oil pan; then remove the rod bearings from the rods - I recommend replacing all of the rod bearings, even if they don't look that bad. The bearings can be replaced with the engine still in the car. Once you have replaced all of the rod bearings, make sure that you torque all of the rod bolts or nuts to the manufactures build specs. Then put the oil pan on with a new pan gasket and a new oil filter. Put in new oil in the engine and start the engine. If the knock goes away they the problem is fixed.

If the knock continues, then you have a piston that is coming apart and needs replacing. If the engine has a vibration afterwards but there is no knock, then the valve train on the cylinder heads are bent and causing a minor misfire.

Problems with engine noise can be symptoms of serious issues, so a certified YourMechanic technician can be dispatched to your location to inspect your engine knocking and provide you with a second opinion or assist you with any repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Car starts, gears change, car won't go.

Hello, thanks for writing in. From what you describe, it would appear that your vehicle may be having transmission issues. The symptoms you are experiencing can be caused by a wide variety of things. A few common causes are a...

Q: Knocking noise. Is it a problem with the belt?

Hello - No, it is incorrect to assume that you couldn't install the new tensioner even though it is of different length. Was the new tensioner longer or shorter? If shorter, there may not be adequate tension on the belt,...

Q: My car starts to misfire really rough after running it for about 30-60 minutes, shutting it off then starting it up

You have taken some great steps to try and resolve these issues. Looking to the spark system was a good choice. Plugs were a good start, but the distributor and wires may be causing the plugs to not receive the...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.