schooling on set cam and crank timing - Moparts Forums

Register Log In Moparts Forums Moparts Question and Answer schooling on set cam and crank timing

Print Thread

schooling on set cam and crank timing #867211 11/30/10 01:01 PM 11/30/10 01:01 PM
Joined: Jul 2010 Posts: 73 louisiana M mopar70charger OP member
mopar70charger OP member M Joined: Jul 2010 Posts: 73 louisiana	i need some help on setting cam and crank timing on a big block 400 engine , i am a bit confused as if the marks to the cam and crank should face each other.or the cam at 12 o' clock and crank at 12 o'clock.. whats the procedure..does it have to be at top dead center first....and pointing at the number 1 piston or number six.. a bit confused please help...thanks guys

Re: schooling on set cam and crank timing [Re: mopar70charger] #867212 11/30/10 01:06 PM 11/30/10 01:06 PM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	crankshaft 12 and cam shaft 6. Piston position will take care of it self when lining up dot to dot. Cam at 12 and crank at 12 will actually end up the same as the crank turns 2 times for every one of the cam.

Re: schooling on set cam and crank timing [Re: mopar70charger] #867213 11/30/10 01:10 PM 11/30/10 01:10 PM
Joined: Aug 2005 Posts: 11,543 chicagoland,usa B buildanother I Live Here
buildanother I Live Here B Joined: Aug 2005 Posts: 11,543 chicagoland,usa	And when both dots are at 12 oclock, set distrib at #1 cyl firing.

Re: schooling on set cam and crank timing [Re: buildanother] #867214 11/30/10 01:50 PM 11/30/10 01:50 PM
Joined: Oct 2010 Posts: 606 Montana Y Yancy Derringer mopar
Yancy Derringer mopar Y Joined: Oct 2010 Posts: 606 Montana	Quote: And when both dots are at 12 oclock, set distrib at #1 cyl firing. This is an important point. It's obviously more accurate "to see" lining up the cam at 6 o'clock and the crank at 12 o'clock THIS POSITION is no6 ready to fire. So all you REALLY need to do--if you don't rotate the engine afterwards---is to drop the dist in pointing to no6 easy

Re: schooling on set cam and crank timing [Re: buildanother] #867215 11/30/10 02:55 PM 11/30/10 02:55 PM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	Quote: And when both dots are at 12 oclock, set distrib at #1 cyl firing. Really a moot point IMO. during assembly the engine may well be turned over several times after the timing chain is installed and before engine is installed in the vehicle and ready to fire. Most that I know don't install the distributor till after teh engine is in place and then install accordingly. Clean it, if it's Dirty. Oil it, if it Squeaks. But: Don't fix it, if it Works!

Re: schooling on set cam and crank timing [Re: MoparforLife] #867216 11/30/10 05:28 PM 11/30/10 05:28 PM
Joined: Aug 2005 Posts: 11,543 chicagoland,usa B buildanother I Live Here
buildanother I Live Here B Joined: Aug 2005 Posts: 11,543 chicagoland,usa	I know Don, but many novices wrongly assume cam dot at 6 oclock, and crank dot at 12 oclock, means it is setup for #1 firing. That screws up many minds. Last edited by buildanother; 11/30/10 05:28 PM.

Re: schooling on set cam and crank timing [Re: buildanother] #867217 11/30/10 05:56 PM 11/30/10 05:56 PM
Joined: Oct 2010 Posts: 606 Montana Y Yancy Derringer mopar
Yancy Derringer mopar Y Joined: Oct 2010 Posts: 606 Montana	Quote: That screws up many minds. Years ago a customer brought in a Ford Y block out of an old boat. The rebuilder went through the engine and the owner could not get it to fire. Finally asked me to take a look. Turns out the installation was reverse rotation---that is until the rebuilder got done. Yea, my mind was screwed up for just a little while

Re: schooling on set cam and crank timing [Re: Yancy Derringer] #867218 11/30/10 06:24 PM 11/30/10 06:24 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	6 & 12 o'clock lets you use a straightedge whereas 12 and 12 o'clock would not (crank snout in the way) and I have no clue as to why cams are not ground so that is #1 compression like most people assume it is and I have yet to see a manual that tells you that it is on #6 firing & not #1 and way back I lost a pole position because we couldn't figure out why it would not fire and I could not get back out onto the track in time live every 24 hour block of time like it's your last day on earth

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1