SR20det.. how to get to TDC - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

clutch kick drifter · 02-16-2006, 02:53 PM

I need to know how to get the SR20det to TDC. CAn i just turn the crank until the ____ mark?

sblack13 · 02-16-2006, 02:55 PM

http://www.frsport.com/sr20det-crank...ide-p-648.html

Silverbullet · 02-16-2006, 02:56 PM

TDC stands for top dead center. It ususally refers to the piston. All the pistons are in different positions so it would be best if you specified which piston. When in terms of timing a motor, you want the first piston to be at TDC. I'm assuming thats what you mean so here is how to do so. You will need a 27mm socket to turn the crank. There are mating marks that you can match up. There are 4 i believe. You want the reference dot to be lined up with the 2nd dot from the left. I hope that was clear.

wootwoot · 02-16-2006, 02:59 PM

Pull out your spark plugs as well, makes turning the motor over much easier =)
I dare you to turn it over while its in gear with no parking brake!

clutch kick drifter · 02-16-2006, 03:08 PM

Number one piston. So the turning the crank with the 27 mm socket will get the #1 piston at TDC?

g2ic02 · 02-16-2006, 07:59 PM

yeah but you are gonna want #1 piston at tdc on the compression stroke if you are concerned with timing. What are you needing to set the motor at top dead center for? that would help everyone tell you how to do it. There is 2 tdc's for piston #1 in one complete combustion cycle. If you are pulling the valve cover off there is a mark on the timing gears. Hopefully this helps

clutch kick drifter · 02-16-2006, 08:16 PM

Im installing the new CAS. I know everyones gonna say ohh you have to take the valve cover off but you dont. A friend of mine put my new one in without taking valve cover off. I wasent there to watch though.

killjoy · 02-17-2006, 09:46 AM

You are right, you don't. Only if you want to verify that it is correct.

daryl337 · 02-21-2006, 02:46 AM

well, or if you want to keep pulling it out and turning it one tooth over until you get it right. :P

To install the CAS... pull the valve cover off... turn the main pulley to the TDC mark (the second one from the left) and then look at your camshafts. Your cam lobes should be pointing away from eachother (on your number 1 cylinder.. assuming your camshafts are timed right).... If they dont point outwards... rotate the pulley 360 degrees... then you will be on TDC on your compression stroke.

Now that you have the motor set to TDC properly... take the CAS... and align it so when you push it in... the alignment marks on the CAS line up. Plug it in... start the car... and stick a timing gun on it to make sure you are sitting at 15 degrees advance.. and voila! =D

02-16-2006, 02:59 PM	#4
wootwoot Post Whore! Join Date: Jan 2004 Location: sarasota florida biatch Age: 39 Posts: 3,850 Trader Rating: (0) Feedback Score: 0 reviews	Pull out your spark plugs as well, makes turning the motor over much easier =) I dare you to turn it over while its in gear with no parking brake! __________________ I'm from Florida so I'm probably a bit more strange than you

02-17-2006, 09:46 AM	#8
killjoy Zilvia Member Join Date: Sep 2001 Location: San Antonio, TX Posts: 215 Trader Rating: (0) Feedback Score: 0 reviews	You are right, you don't. Only if you want to verify that it is correct. __________________ stolen s13 new stock non-stolen s13

02-16-2006, 02:53 PM	#1
clutch kick drifter Zilvia Junkie Join Date: Jul 2005 Location: TN Posts: 498 Trader Rating: (0) Feedback Score: 0 reviews	SR20det.. how to get to TDC I need to know how to get the SR20det to TDC. CAn i just turn the crank until the ____ mark?

02-16-2006, 02:55 PM	#2
sblack13 Zilvia FREAK! Join Date: May 2005 Location: Seattle Age: 38 Posts: 1,016 Trader Rating: (10) Feedback Score: 10 reviews	http://www.frsport.com/sr20det-crank...ide-p-648.html

02-16-2006, 03:08 PM	#5
clutch kick drifter Zilvia Junkie Join Date: Jul 2005 Location: TN Posts: 498 Trader Rating: (0) Feedback Score: 0 reviews	Number one piston. So the turning the crank with the 27 mm socket will get the #1 piston at TDC?

02-16-2006, 07:59 PM	#6
g2ic02 Zilvia Junkie Join Date: Jul 2003 Location: minnesota Posts: 480 Trader Rating: (3) Feedback Score: 3 reviews	yeah but you are gonna want #1 piston at tdc on the compression stroke if you are concerned with timing. What are you needing to set the motor at top dead center for? that would help everyone tell you how to do it. There is 2 tdc's for piston #1 in one complete combustion cycle. If you are pulling the valve cover off there is a mark on the timing gears. Hopefully this helps

02-16-2006, 08:16 PM	#7
clutch kick drifter Zilvia Junkie Join Date: Jul 2005 Location: TN Posts: 498 Trader Rating: (0) Feedback Score: 0 reviews	Im installing the new CAS. I know everyones gonna say ohh you have to take the valve cover off but you dont. A friend of mine put my new one in without taking valve cover off. I wasent there to watch though.

02-21-2006, 02:46 AM	#9
daryl337 Zilvia Junkie Join Date: Aug 2005 Location: Pac NW Age: 39 Posts: 589 Trader Rating: (1) Feedback Score: 1 reviews	well, or if you want to keep pulling it out and turning it one tooth over until you get it right. :P To install the CAS... pull the valve cover off... turn the main pulley to the TDC mark (the second one from the left) and then look at your camshafts. Your cam lobes should be pointing away from eachother (on your number 1 cylinder.. assuming your camshafts are timed right).... If they dont point outwards... rotate the pulley 360 degrees... then you will be on TDC on your compression stroke. Now that you have the motor set to TDC properly... take the CAS... and align it so when you push it in... the alignment marks on the CAS line up. Plug it in... start the car... and stick a timing gun on it to make sure you are sitting at 15 degrees advance.. and voila! =D