Question about Cars & Trucks
I need to know step by step. does it have to be top dead center or on exhaust stroke. the crank turns twice to every one rev. of the cam
Right, so you have two TDC's-the exhaust stroke and the compression stroke Top Dead Center-and both occurr when the crank hits the zero mark on the timing scale.
Always set timing with the number one cylinder at TDC on the compression stroke. How do you know which is which? If you have a distributor, the rotor will be pointing to number one cylinder tower, when at TDC of the compression stroke. If you are on the exhaust stroke's TDC, the rotor will be pointing just opposite of number one .
If you don't have a distributor, look at the valves for cylinder one under the valve cover. If at TDC of compression stroke, both valves will be closed. At TDC of exhaust stroke, the exhaust valve will be open.
You can also find the compression stroke on number one by pulling out the spark plug for number one, and either put a wrench or socket on the crank pulley and turn it clockwise, or use the starter and bump the engine over in short bumps. Put your finger or thumb over the spark plug hole and feel for the pressure to build up. As soon as you feel pressure on your finger, (if turning by hand, pressure will be slight, but you can feel it) you are on the compression stroke. Stop bumping the starter and turn the crank on around by hand until the zero mark lines up on the timing scale-TDC of compression stroke! The exhaust stroke will have no pressure build-up as the piston comes to top-because the exhaust valve is open. On the compression stroke, both valves are closed as the piston travels up the cylinder.
Posted on Dec 08, 2012
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Posted on Jan 02, 2017
there should be an acid mark (black mark) on gear, and yes cylinder #1 top dead center ps. make sure to disconnect distributor so it dont fire
Posted on Jan 05, 2009
well hold on there cowboy, first consult your service manual if your cars engine is an interference type. it means that if ever your timing belt breaks the valves that were stranded shall be hammered by up moving piston. eventually bending and warping of some of the valves would be a result. sometimes a damaged piston could also happen. timing belt breakage is a very serious matter and should not be taken likely. if you do not have a manual, what i do is removing the whole cyclinder head and inspect it. its better to be sure than sorry. in other cases you could see the warped valves by turning the crankshaft from tdc to 90 deg. and after which try turning the camshaft all the way around and carefully feeling the ease or difficulty in turning it and also the lift and rest of the rocker arms. any deviations you from the standard filler guage clearances would mean a bent or broken valves. hope this helps.
Posted on Apr 14, 2009
SOURCE: timing belt broke on mazda 5
Think you have to put a flat bar across the back of the cam shafts same as the old ZETEC ford motors. Failing that are the vernier pullies marked with eithr O T or do they have a - or a . that line up with a position on the end of the cylinder head.
Posted on May 12, 2009
Sign up for an account on hmaservice.com. Once you do so, log in and click on "Shop". You can then enter your year/make/model and you will find the info under, engine mech. system>timing system>timing belt>repair procedures. Very detailed, and best of all, FREE.
Posted on May 27, 2009
My sincere apologies for the severly delayed response.
I am personally going back to answer your unanswered questions. I have only been on this site for the past 4-months as a free contributor.
I do not know if you still need this information, however I am answering it - in case you still do.
Click on the following direct Link. It has several Diagrams for your 2001 Hyundai Accent Timing Belt and Marks.
Again my apologies...
Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!
Posted on Mar 19, 2010
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