TDC help?
Thread Starter
Instructor
Joined: Jun 2013
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From: hanceville al
TDC help?
I bought a TDC tool, the kind that goes in the #1 cylinder. You then rotate the engine clockwise (by hand) until it stops and mark the HB at 0 degrees and then rotate the engine counter clockwise until it stops and mark the HB at 0 degrees. You the split the difference between the two marks and you have your true TDC. Problem I'm having is when I rotate the engine counter clockwise the bolt on the HB loosens and the engine does not rotate. Any one done this before? Is there another way to rotate the engine counter clockwise? Thanks for the advice.
Melting Slicks
Joined: May 2014
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From: New Port Richey FL
since you probably need the space you probably already have the pulley off already you could protect the threads of pulley bolts or find to use bolts and use them as a leverage point with a long screwdriver between them to rotate the motor
Last edited by s carter; May 20, 2016 at 08:38 PM.
Team Owner
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From: Park City Utah
Pull the starter or the flywheel inspection cover, turn engine w/a screw driver or pry bar in the flywheel teeth. Shorten the distance required by going past TDC a bit, screw in your tool, back then engine/piston into the tool...then rotate forward w/a wrench until the piston hits the tool again, on the "other side".
Melting Slicks
Joined: May 2014
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From: New Port Richey FL
You never did say what motor or year? it makes a deference, 84 thru the L-98 have a stamped steel pulley but the LT-1's ushered in the pulley/balancer as 1 unit
Last edited by s carter; May 20, 2016 at 10:10 PM.
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Melting Slicks
Joined: May 2014
Posts: 2,888
Likes: 590
From: New Port Richey FL
If you do get a new balancer or remove the old one for so reason you may want to also look for the balancer installer tool some may say tap on with hammer and seat with center bolt I'm not a big fan of that a tool for every job.
Last edited by s carter; May 20, 2016 at 11:26 PM.
Thread Starter
Instructor
Joined: Jun 2013
Posts: 225
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From: hanceville al
Thanks for all the input ya'll. What I really need it to be able to do is rotate the engine back wards to use the TDC tool. Maybe if I take off the pulley I can put the bolts bake in and use a large screw driver to put in between two bolts and twist counter clockwise. I have the spark plugs out so there shouldn't be much resistance. Is there any thing I need to worry about rotating the engine backwards, I don't think that will be a issue.
Melting Slicks
Joined: May 2014
Posts: 2,888
Likes: 590
From: New Port Richey FL
Thanks for all the input ya'll. What I really need it to be able to do is rotate the engine back wards to use the TDC tool. Maybe if I take off the pulley I can put the bolts bake in and use a large screw driver to put in between two bolts and twist counter clockwise. I have the spark plugs out so there shouldn't be much resistance. Is there any thing I need to worry about rotating the engine backwards, I don't think that will be a issue.
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Pull the starter or the flywheel inspection cover, turn engine w/a screw driver or pry bar in the flywheel teeth. Shorten the distance required by going past TDC a bit, screw in your tool, back then engine/piston into the tool...then rotate forward w/a wrench until the piston hits the tool again, on the "other side".
Melting Slicks
Joined: May 2014
Posts: 2,888
Likes: 590
From: New Port Richey FL
That is also a good way but I thought up a much easier way, find a large strap wrench l have a real long one for changing home water filters that would make it around the balancer or pulley
Last edited by s carter; May 21, 2016 at 08:50 AM.
Thread Starter
Instructor
Joined: Jun 2013
Posts: 225
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From: hanceville al
Strap wrench, I like it. Since I'm only going 360 degrees back ward all the spark plugs are out so couldn't I just grab the belt right off the HB and pull it counter clockwise. The tension should move it. It may slip a time or two but it doesn't have to go far. I have seen some one do this but pulled it clock wise, he was in a pinch with no tools. It worked, he pulled the serpentine belt clockwise until the he hit 0 degrees.
Burning Brakes
Joined: Aug 2006
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From: Seattle WA
Advanced
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I bought a TDC tool, the kind that goes in the #1 cylinder. You then rotate the engine clockwise (by hand) until it stops and mark the HB at 0 degrees and then rotate the engine counter clockwise until it stops and mark the HB at 0 degrees. You the split the difference between the two marks and you have your true TDC. Problem I'm having is when I rotate the engine counter clockwise the bolt on the HB loosens and the engine does not rotate. Any one done this before? Is there another way to rotate the engine counter clockwise? Thanks for the advice.
