okay im doing a new cam install.. but i forgot to put it at TDC before i took the old cam out.. and i htik i need to put it on TDC.. could anyone HELP please

 

bring no.1 cylinder up to TDC and install the cam, make sure the timing marks on the timing chain gears line up and youre all set.

 

remember that the piston is up TWICE on each full rotation.

Make sure its on the propper up stroke.

 

You have the camshaft out - WHICH TDC, is of no concern. You simply make sure that the camshaft has BOTH valves closed completely, on #1, TDC - with both valves closed, you've made sure that you are on TDC of the compression stroke

 

okay.. i dont have anything in.. n i dont have to turn the crank so the bearings line up? n pistons..i just put it back in on tdc? i dont get it! sorry

 

once you install the cam and lifters, rockers, etc, make sure you have the crank on TDC and both valves on the no. 1 cylinder are closed. then you put the timing chain gears on and line up the timing marks on them to get the cam and crank in timing together. with the chain on and at TDC, you should still see both valves closed, if not, the cam gear is not on the cam right.

 

Dave, what dowards saying, is that the cam is out, the valves wont mean crap, which hes right.

the timing mark on the crank gear only hits top/tdc once correct? If so, he can rotate the crank tell that mark is strait up. Install cam, temp put that gear on w/o chain, rotate it so that the #1 valves are closed and marks line up. Then pull the cam gear off, and install the timing chain properly.

 

ok i get it now, i misread it.

 

okay .. i will try that.. thank you.. i think i understand it now

 

if you do that as I typed. Attempt to rotate engine 1 whole cycle by hand before you crank it with the starter and attempt to fire.

I am not 100% sure if the crank gear rotates 1 or 2 times per engine revolution.

That way, IF something is wrong it will just "jam up", if you try cranking with starter your gonna bend/break something.

 

The camshaft sprocket is sized such that the camshaft spins at 1/2 the crankshaft's rpm.

The crank spins twice, for every 1 cam turn

I spin the motor through at least 720º of crank rotation, with the camshaft hooked up - just to be sure all looks good.

MAKE SURE YOU PRE-LUBE THE ENGINE BEFORE INITIAL FIRE UP.

TO BREAK IN THE CAMSHAFT, REV BETWEEN 2000-2500RPM FOR 20 MINUTES - DO NOT STAY AT ONE RPM!

Is this just a cam swap? Or did you do new rings/mains/rods/etc, too?

Port the intake, if you have it out

 

just the cam..lol thanks.. you guys have been plenty of help.. thanks... i stil lhavnent put it in yet so if i need help still ill post again thanks!

 

If I Recall Correctly, a 10mm socket fits the oil pump hex driveshaft perfectly. So you could pull the distributor out, use a 10mm socket on a lonnng extension to engage the oil pump's hex drive shaft, and then spin the extension with a drill.

Might be worth it to buy a short 3" extension and cut the "female" end off. That way, you could assemble the parts as follows: 10mm socket - long extension - short & cut extension - drill. (By cutting the female end of the short extension off, the short extension should fit into your drill chuck.)

Then just spin the shaft until your oil pressure gauge moves (or until you see oil spurt out of the pushrods).