timing question

ckjacobus · August 6th, 2007, 12:16 AM

How is the correct way to tell if you motor is at TDC. I have turned the crank all the way until it says that it is on TDC according to the mark and the HAYNES manual says that the bolt on the back of the cam should be parallel with valve cover surface, but it is not when the crank is at TDC. I have taken the heads off now but I want to make sure witch way is the correct way so when I put the new ones on they go on the right way so I don't kill my pistons. Thanks for the help.

Boomer · August 6th, 2007, 12:53 AM

The crank gears or gear depending on the engine, some are one pc. some are two, anyhow. the dots are to be at 6 o'clock or facing down Take the chains ans lay them flat on a table squeeze the chain together and stretch them out straight so all the links are touching.

_ <mark this link
l l
l l
l l
l l
l l
l l
L l
^mark this

Sorry not to scale, but you get the point, you need to use a paint marker to mark the chain end to end. Align these ends with the crank dots and cam dots keeping tension on the chains in clockwise rotation to avoid jumping or lock tensioners fully. You cannot be off by doing it that way, be sure not to rotate the engine until you have both chains aligned properly as it will take dozens of rotations for them to return back 52 total turns if IIRC. Lock the tensioners< very important <<<<< and you'll be good to go.

MustangMatt96GT · August 6th, 2007, 12:56 AM

okay sounds good it was a question I had too!

Whats IIRC mean?

Boomer · August 6th, 2007, 01:17 AM

Originally Posted by MustangMatt96GT

okay sounds good it was a question I had too!

Whats IIRC mean? Again? ( <added by Boomer)

If I recall correctly, sorry didn't feel like typing I am getting older and lazy (er)

MustangMatt96GT · August 6th, 2007, 01:21 AM

yeah I get lazy too! lol

Boomer · August 6th, 2007, 01:21 AM

Matt you will use the same process when you degree your cams, however you will be pulling it apart 10-15 times until you get the ICL (intake centerline) correct. It sucks, but until someone comes up with a reliable adjustable gear you have to keep grinding untill you get it set with'in a half of a degree or less.......Or pay for my gas for me to come do it for you LOL......

Boomer · August 6th, 2007, 01:57 AM

http://phatdoggy.home.comcast.net/sohc_timing.htm This is a very GOOD write up, hope it helps.......

August 6th, 2007, 12:16 AM	#1
ckjacobus Newbie Join Date: Jun 2007 Posts: 37	timing question How is the correct way to tell if you motor is at TDC. I have turned the crank all the way until it says that it is on TDC according to the mark and the HAYNES manual says that the bolt on the back of the cam should be parallel with valve cover surface, but it is not when the crank is at TDC. I have taken the heads off now but I want to make sure witch way is the correct way so when I put the new ones on they go on the right way so I don't kill my pistons. Thanks for the help. __________________ 96 GT, CAI, 75mm TB, PP Plenum, typhoon intake manifold, BBK shorties, flowmaster catack, UPR x pipe, FRPP 9mm race wires, complete PI swap

August 6th, 2007, 12:53 AM	#2
Boomer Enthusiast Join Date: Oct 2006 Location: warren, Mi Posts: 880	The crank gears or gear depending on the engine, some are one pc. some are two, anyhow. the dots are to be at 6 o'clock or facing down Take the chains ans lay them flat on a table squeeze the chain together and stretch them out straight so all the links are touching. _ <mark this link l l l l l l l l l l l l L l ^mark this Sorry not to scale, but you get the point, you need to use a paint marker to mark the chain end to end. Align these ends with the crank dots and cam dots keeping tension on the chains in clockwise rotation to avoid jumping or lock tensioners fully. You cannot be off by doing it that way, be sure not to rotate the engine until you have both chains aligned properly as it will take dozens of rotations for them to return back 52 total turns if IIRC. Lock the tensioners< very important <<<<< and you'll be good to go. __________________ Just another 10 second Mustang, what did you expect ? http://youtube.com/watch?v=BgykaUrmfvM

August 6th, 2007, 12:56 AM	#3
MustangMatt96GT All Throttle with a Bottle 1996 Mustang GT 12.91@105.29 @ 5800 FT Join Date: Dec 2006 Location: Lakewood, CO Posts: 7,609	okay sounds good it was a question I had too! Whats IIRC mean? __________________ We expect shit to break, look foward to realizing exactly when it is happening, and than obsess about dropping plenty of cash to rebuild stronger, so we can try to run it hard as hell and break again. We are sick individuals. I support the MM Staff

August 6th, 2007, 01:21 AM	#5
MustangMatt96GT All Throttle with a Bottle 1996 Mustang GT 12.91@105.29 @ 5800 FT Join Date: Dec 2006 Location: Lakewood, CO Posts: 7,609	yeah I get lazy too! lol __________________ We expect shit to break, look foward to realizing exactly when it is happening, and than obsess about dropping plenty of cash to rebuild stronger, so we can try to run it hard as hell and break again. We are sick individuals. I support the MM Staff

August 6th, 2007, 01:21 AM	#6
Boomer Enthusiast Join Date: Oct 2006 Location: warren, Mi Posts: 880	Matt you will use the same process when you degree your cams, however you will be pulling it apart 10-15 times until you get the ICL (intake centerline) correct. It sucks, but until someone comes up with a reliable adjustable gear you have to keep grinding untill you get it set with'in a half of a degree or less.......Or pay for my gas for me to come do it for you LOL...... __________________ Just another 10 second Mustang, what did you expect ? http://youtube.com/watch?v=BgykaUrmfvM

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August 6th, 2007, 01:57 AM	#7
Boomer Enthusiast Join Date: Oct 2006 Location: warren, Mi Posts: 880	http://phatdoggy.home.comcast.net/sohc_timing.htm This is a very GOOD write up, hope it helps....... __________________ Just another 10 second Mustang, what did you expect ? http://youtube.com/watch?v=BgykaUrmfvM

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