Whats up i have a jdm b18c about to go in my eg hatch. Before it goes in i was doing a toda t-belt, new water pump, new tensioner, belts etc. I wanted to know about TDC, c-speed racing says to align the cam gears and crank before the old belt is removed and that when your putting on the new belt to make sure nothing is out of line, if it is to align it. My exhaust cam was off so i moved it towards the intake so line marks would align, i then turned the crank clockwise so that both the marks on the block and crank would meet. As long as the marks are all meeting properly then engine is at TDC correct? I just have to make sure that cam gears and crank stay aligned when re-installing the new belt. Thanks

 

ANYONE???????

 

yes, as long as your crank pully TDC mark matches the block pointer, and your arrows on cam gears face "up" (use the dots on the sides to help line up also) then you are at TDC.

 

dont turn crank clockwise (slack will go on the wrong side). Line up white mark on crank pulley to marker on t-belt cover; match up the two cam gears and get belt on, turn crank counterclockwise slightly so belt tensioner takes up slack then tighten tensioner then do full revolution and recheck timing marks.

greg

 

And be sure to note that even when the crank pulley is at all lined up, that doesn't necessarily mean that the no.1 piston is at tdc! Take out the no. 1 spark plug, and if you can see the top of the piston, then you know you are at tdc!

 

should do a complete revolution clockwise and check to make sure that all the points meet up

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hookedonhatch &raquo;</TD></TR><TR><TD CLASS="quote">should do a complete revolution clockwise and check to make sure that all the points meet up</TD></TR></TABLE>

COUNTERclockwise, not clockwise.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mattssi &raquo;</TD></TR><TR><TD CLASS="quote">And be sure to note that even when the crank pulley is at all lined up, that doesn't necessarily mean that the no.1 piston is at tdc! Take out the no. 1 spark plug, and if you can see the top of the piston, then you know you are at tdc! </TD></TR></TABLE>

thats exactly what that mark means. how on earth could it line up and not be at TDC? its not like the pulley rotates 1/2 the speed of the crankshaft

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96dxB16 &raquo;</TD></TR><TR><TD CLASS="quote">

thats exactly what that mark means. how on earth could it line up and not be at TDC? its not like the pulley rotates 1/2 the speed of the crankshaft </TD></TR></TABLE>

he's referring to checking if #1 is on it's compression stroke and not intake stroke. there are 2 TDC's for every cycle.

 

you guys are making life complicated for yourselves... if the cam gears are aligned then there is no need to worry about exh stroke vs compression stroke. The crank pulley is at TDC whent he white mark is aligned to the Tbelt cover, before putting on timing belt the crank spins independently so no need to worrk about what phase its at, the cams are the important one not the crank.

Greg

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CHEETAH &raquo;</TD></TR><TR><TD CLASS="quote">you guys are making life complicated for yourselves... if the cam gears are aligned then there is no need to worry about exh stroke vs compression stroke. The crank pulley is at TDC whent he white mark is aligned to the Tbelt cover, before putting on timing belt the crank spins independently so no need to worrk about what phase its at, the cams are the important one not the crank.

Greg</TD></TR></TABLE>

 

ok now one more question. What im really worried about is if its matters if the cams are aligned after the belt is off. Like say for instence that you took your timing belt off and someone brushed against the one of the cam gears and moved it. Could i simply rotate it to line up again.?????

 

yes. just put a socket wrench on the bolt and turn it however you need to.

 

ok phat thanks