3rd Gen Engine and Drivetrain -> 2003-2007 5.9 liter Engine and drivetrain discussion only. PLEASE, NO HIGH PERFORMANCE DISCUSSION!

How to find tdc

Thread Tools
 
Search this Thread
 
Old Oct 16, 2006 | 03:32 PM
  #1  
logan21sv's Avatar
Thread Starter
Registered User
 
Joined: Jan 2006
Posts: 57
Likes: 0
From: Houston
How to find tdc *Emergency*

can anyone point me in the right direction getting to TDC on an 03
Reply
Old Oct 17, 2006 | 08:51 PM
  #2  
Mr Bee's Avatar
Registered User
 
Joined: Sep 2006
Posts: 501
Likes: 0
From: Gainesville, Ga
Thumbs down

Logan...
There is only one way to find TDC on any engine and be precise. The problem is that when the piston is at TDC the crank is still rotating and the piston is not moving, so indicators do not work. I have used the following method for more years than I hate to admit and it is the only real way to be exact or nearly so.
You will need a degree wheel mounted to the front of the crank with a pointer. Remove #1 injector or glow plug, something that will give you a threaded hole into the top of the cylinder. With a bolt or stop threaded into the hole deep enough to contact the piston, rotate the crank by hand very slowly until you feel the piston make very light contact on the inserted stop.
Read the degree wheel, maybe even loosen and rotate so the pointer is on zero. Now, rotate the crank by hand slowly in the opposite direction until you feel the piston gently bump the stop. Look at the degree wheel. If you set it on zero and then rotated it the opposite direction and it stopped on 15 degrees, split the difference in two (7 1/2 degrees) and that is your actual TDC. Make sure that you are doing this on the compression stroke

I hope this is what you were looking for. Good luck
Reply
Old Oct 17, 2006 | 09:39 PM
  #3  
PourinDiesel's Avatar
Registered User
 
Joined: Jan 2002
Posts: 5,352
Likes: 0
From: Southern, Indiana
I just use the TDC mark on the damper.
If you can feel open lash on the #1 intake and #1 exhaust then the motor is @ TDC. If you have the TDC mark on the crank in the TDC location and both of the valves listed above are in compressed positions then the engine is @ 180* out.

This method works.....
Reply
Old Oct 17, 2006 | 11:09 PM
  #4  
2500's Avatar
Registered User
 
Joined: Sep 2006
Posts: 911
Likes: 0
From: Oklahoma
this method will work on any motor. including two stroke chainsaws with no TDC markings.

Originally Posted by Mr Bee
Logan...
There is only one way to find TDC on any engine and be precise. The problem is that when the piston is at TDC the crank is still rotating and the piston is not moving, so indicators do not work. I have used the following method for more years than I hate to admit and it is the only real way to be exact or nearly so.
You will need a degree wheel mounted to the front of the crank with a pointer. Remove #1 injector or glow plug, something that will give you a threaded hole into the top of the cylinder. With a bolt or stop threaded into the hole deep enough to contact the piston, rotate the crank by hand very slowly until you feel the piston make very light contact on the inserted stop.
Read the degree wheel, maybe even loosen and rotate so the pointer is on zero. Now, rotate the crank by hand slowly in the opposite direction until you feel the piston gently bump the stop. Look at the degree wheel. If you set it on zero and then rotated it the opposite direction and it stopped on 15 degrees, split the difference in two (7 1/2 degrees) and that is your actual TDC. Make sure that you are doing this on the compression stroke

I hope this is what you were looking for. Good luck
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
92smokin blacky
1st Gen. Ram - All Topics
18
Mar 10, 2011 09:30 AM
05Supersomker
3rd Gen Engine and Drivetrain -> 2003-2007
4
Dec 19, 2007 09:34 PM
1980240D
3rd Gen Engine and Drivetrain -> 2003-2007
3
Nov 25, 2007 10:57 AM
1320
12 Valve Engine and Drivetrain
11
Apr 27, 2004 11:53 AM
Superduty12v
12 Valve Engine and Drivetrain
4
Jun 11, 2003 12:04 PM




All times are GMT -5. The time now is 06:30 PM.