Well, let me first say, I'm a dumbass.



I am building a D16A6 with eagle rods, vitara pistons, etc, the usual. I have the block sitting on an engine stand waiting for the head to go on. Only problem is, when I pulled the head I am using off of the motor it was currently on, I didn't set it to TDC before taking the T-belt off.

Obviously I can line up the marks on the cam gears and line up the marks on the crank pulley and bolt it on, but aren't their rotational speeds different? Like the cam moves twice as fast as the crank pulley, right? So how do i know which rotation to set it on.

My only guess is to go by the valves. With the head off I can spin it around and see which valves are open and closed. When cylinder number one is at TDC, what are the other cylinders valves doing?

If anyone has insight as to how I should make sure the head is at the correct TDC then please enlighten me as it is going in tomorrow.

 

OK, so after some research my plan now is to spin the head around with a wrench on the pulley until it is lined up with the marks, then spin the block around until it is lined up with it's marks, then bolt the two together, slap the belt on and call it a day.

Sound good?

 

yup. the crank turns 2 times everytime the cam turns once. so if you line up all the timing marks you are good to go

 

sounds good!

its not hard... line up the cam marks, then put the bottom end gear mark right on with that little arrow on the pump, and put the belt on. make sure all are RIGHT ON, and get that belt tight.

spin it over a few times, and make sure it looks good, and it should be fine.


i usually put the belt over the cam and crank gear first, have somebody old them where they need to be (tight in the front of the belt, where it "pulls" obviously", and then work it over the water pump and tensioner next.

then , pull up on the tensioner, tighten, and make sure the belt deflection is what i want (very minimal...maybe 1/8'' to 1/4'')

 

So I am just psyching myself out? Lol. I was worried that the head would be on a different stroke than the block, yadda yadda yadda. I'm a loser.

 

I've done plenty of timing belts, so I know the procedure. I was just freaking myself out that the head spun at a different speed than the crank and it was going to be on the wrong stroke. I'm retarded and need to stop working on my car so late at night.

 

as long as the block is at tdc, and you line the cam up before you set it on, you are golden.

 

stick a long straw in cylinder 1 and turn the crank until its at its highest piont. then line up the cam gears, then reinstall the timing belt.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rudebwoy &raquo;</TD></TR><TR><TD CLASS="quote">stick a long straw in cylinder 1 and turn the crank until its at its highest piont. then line up the cam gears, then reinstall the timing belt.</TD></TR></TABLE>

Yeah, screw the big clear lines on the timing belt cover, use straws!

 

this method is as accuarate as using the markings. I use this to confirm that it is at TDC.