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Author Topic:   TDC
posted October 03, 2002 06:01 AM
I have a 77 350 that I bought and when i went to replace the timing chain the marks dont line up,been told that dots should point up and been told they should point towards each other,which is it?I need to put it together and I was wondering if they dont line up do you turn the cam until they do.Thanks for any help.

posted October 03, 2002 08:52 AM
Them there dot's like to be close together in the middle and then you should be right on the money.

posted October 03, 2002 09:17 AM
the dot on the cam sprocket should be pointing down towards the crank and the crank dot should be pointing up inline with the top dot,u get the motor on tdc and then turn ur cam sprocket to get the cam in time with the crank. thats how i do it an never had any problems.unless you want to get techinical with the timing an use a degree wheel.

posted October 03, 2002 04:58 PM
all i know is that i put mine dot to dot and done it for years i have no problems with the timing.but u can also do it with top dot up and bottom dot up thats what i have heard an sean it done but i will not do it. i have a stupid question,say ur ehgine has no heads on it it sitting on stand ur putting timing chain in it #1 is at tdc how the heck u going to say its on exhaust when that piston is at tdc it is on compression stroke.might be wrong but thats how i do it

posted October 04, 2002 03:56 AM
Thank you all for the help.I think I confirmed what I thought and continue on with putting it together.Much appreciated.

posted October 06, 2002 10:17 PM
It's a four stroke engine; intake, compression, power, exhaust. Piston comes to the top on the compression stroke and the exhaust stroke.

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