Skip the auto shop - Our mechanics make house calls

Q: replacing broken chain guide top bolt has 10mm hex plug that willnot accept the tool. any idea?

asked by on

tool does not fit

My car has 166000 miles.
My car has an automatic transmission.

A: Hello. If the timing chain bolt does not ac...

Hello. If the timing chain bolt does not accept your 10mm tool the first thing I would do is try a different one. A different tool, even if it is of the same size, may have different clearances, perhaps enough to remove the bolt. If the head is stripped you may be able to remove it with a larger size, perhaps 11mm, or the closest standard size. If that does not work you may require a specialized tool for removing stripped hex head bolts to remove the fastener.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: My spark plugs seems to be far down and no one can get a tool around them to get them out. Is there any solution?

Hello, thanks for writing in to YourMechanic. This requires a special type of socket and wrench to get to the spark plugs due the angle they are mounted into the cylinder head. If you're unable to get them out yourself,...

Q: Speedometer broken

Many vehicles uses a vehicle speed sensor or wheel speed sensor to determine the rate at which certain gears or the wheels are spinning to determine the vehicle speed. A malfunction here and take away the signal required to activate...

Q: Alternator needs changed out. What tools is best for this?

To remove the alternator to your vehicle, you will need a serpentine belt tool (or a breaker bar 1/2 inch drive), a 3/8 drive socket set with a ratchet, and a medium side pry bar to help remove the alternator...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...