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TDC...how the heck...

Started by Dino, June 08, 2014, 04:26:57 PM

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firefighter3931

Quote from: myk on June 09, 2014, 08:04:43 PM
Quote from: firefighter3931 on June 09, 2014, 06:41:38 PM
Dino,

You don't need a piston stop to get the emgine at TDC.  ;) The procedure outlined above using the piston stop is how you check indexing on the harmonic balancer.  :yesnod:

-Pull all the plugs
-Rotate the engine so that the timing mark lines up the zero mark on the timing cover tab
-Check to see if #1 piston is at the top of the bore. If it is....you're at TDC. You can use a small piece of wire through the sparkplug hole to feel for the piston. If the piston is not up top....rotate the engine 360* and check again.
-Once you've set #1 to TDC install the distributor and clock it so that the vac advance is paralell to the front of the engine....this will allow for for/aft movement to adjust the timing.

* I like to advance the timing to 15* BTDC then install the distributor with the rotor lined up at #1 on the cap. This gives you your initial timing allready dialed in and makes the engine easier to fire.


Ron

Ron, what about the drop-in method I mentioned above?  Would that have worked if Dino still had his old distributor installed?

Yep, that would work fine as long as the rotor was lined up with the correct tower on the cap. I've seen some MP distributors that were not phased properly as compared to stock.

I prefer to start from scratch and time it using established procedures.  :yesnod:


Ron
68 Charger R/T "Black Pig" Street/Strip bruiser, 70 Charger R/T 440-6bbl Cruiser. Firecore ignition  authorized dealer ; contact me with your needs

Dino

Good plan!  I  have a white paint pen that should do the trick.  Do I mark anything on the timing mark plate itself to making setting the timing easier?

If the split lines up with the zero mark, can it still be on the overlap stroke?  Ie do I have to pull the valve cover to make sure?  I don't mind doing so if it gives me the security.  I'd like to install the new plug wires only once if possible.   :icon_smile_big:
Extraordinary claims require extraordinary evidence.

firefighter3931

Marking the scale on the timing cover tab will definately make it easier to read with the timing light  :2thumbs:

Removing the Valve cover will definately make things easier or you can bump the engine over at the starter relay with your finger over the #1 spark plug hole. Either way will work  :yesnod:


Ron
68 Charger R/T "Black Pig" Street/Strip bruiser, 70 Charger R/T 440-6bbl Cruiser. Firecore ignition  authorized dealer ; contact me with your needs

myk

Quote from: firefighter3931 on June 10, 2014, 10:26:19 AM
Quote from: myk on June 09, 2014, 08:04:43 PM
Quote from: firefighter3931 on June 09, 2014, 06:41:38 PM
Dino,

You don't need a piston stop to get the emgine at TDC.  ;) The procedure outlined above using the piston stop is how you check indexing on the harmonic balancer.  :yesnod:

-Pull all the plugs
-Rotate the engine so that the timing mark lines up the zero mark on the timing cover tab
-Check to see if #1 piston is at the top of the bore. If it is....you're at TDC. You can use a small piece of wire through the sparkplug hole to feel for the piston. If the piston is not up top....rotate the engine 360* and check again.
-Once you've set #1 to TDC install the distributor and clock it so that the vac advance is paralell to the front of the engine....this will allow for for/aft movement to adjust the timing.

* I like to advance the timing to 15* BTDC then install the distributor with the rotor lined up at #1 on the cap. This gives you your initial timing allready dialed in and makes the engine easier to fire.


Ron

Ron, what about the drop-in method I mentioned above?  Would that have worked if Dino still had his old distributor installed?

Yep, that would work fine as long as the rotor was lined up with the correct tower on the cap. I've seen some MP distributors that were not phased properly as compared to stock.

I prefer to start from scratch and time it using established procedures.  :yesnod:


Ron

My 90's era MP distributor has a phase problem: the terminals inside the cap have the ignition burn-mark not on center but off to the side of the terminal.  I'm surprised the engine fires at all...

Tilar

10 minute job... Pop the valve cover off over the number 6 cylinder, roll the engine over to the point where you see the exhaust valve on #6 closing and the intake valve on #6 starting to open. Roll the crank to the point where both valves are open the same amount (won't be much) and that will put #1 cylinder at TDC on the compression stroke. Mark your balancer and timing cover if there isn't already a mark, reinstall the valve cover and pop a top on a cold one.  :2thumbs:

Yeah this might have been mentioned earlier but I haven't read all the replies.
Dave  

God must love stupid people; He made so many.



BSB67

Personally, for fast, easy and works every time, I'd go finger in the hole.

500" NA, Eddy head, pump gas, exhaust manifold with 2 1/2 exhaust with tailpipes
4150 lbs with driver, 3.23 gear, stock converter
11.68 @ 120.2 mph

Dino

I should have a bit of time this weekend to do this.  Finger in the hole will still be a bit hard seeing I'm doing this alone but if I find a victim to help I'll try it. 

I just replaced the valve cover gasket and bolts on the passenger side.  Do I have to pull it back off to check the valves or can I do this with the ds cover removed?  I haven't changed that gasket or bolts yet.  :icon_smile_big:

I don't know anything about valves so I'll have to spend some time looking up what the heck you guys are talking about.   :lol:

Extraordinary claims require extraordinary evidence.

Tilar

If you use the method I mention you would have to pull that valve cover back off, because #6 piston moves in exact relation to #1 making #6 between the exhaust and intake stroke where #1 will be between the compression and power stroke. If you can figure out which valve is the exhaust valve on #6 cylinder, as you bump your engine over you will see that valve open and then close as you turn the engine, when the exhaust valve comes back up there will be a point right as it closes that both valves should be open just a little as the intake valve starts to open. That is the position where your #1 piston is at Top Dead Center of the compression stroke.

It's the easiest way I know of if you're doing it by yourself and you want to be exact. You can rig up a momentary on push button switch and a couple wires (remote start button) hooking it up to the starter relay and just bump the engine over with your finger over the hole, but you're not going to feel the exact position with your finger unless you can see the timing marks.
Dave  

God must love stupid people; He made so many.



Dino

Alright I'll pull the ps cover again.  I want to do this right.  Thanks!   :cheers:
Extraordinary claims require extraordinary evidence.

Tilar

Dave  

God must love stupid people; He made so many.



cudaken

Quote from: Dino on June 12, 2014, 09:57:48 AM
Alright I'll pull the ps cover again.  I want to do this right.  Thanks!   :cheers:

What the heck is a ps cover?  :scratchchin: Power Steering? :shruggy:

Dino, you are making this way harder than it needs to be!

Ken
I am back

Dino

Passenger side.  We were talking about the valve cover.

I literally only had a few minutes this weekend so I stuck the socket on the crank pulley and turned so the slit on the dampener was on the zero mark.  I can feel the piston with a wooden dowel but can't say If it's all the way at the top.  Unless there's another way to make sure it is TDC at the compression stroke, I'm pulling that valve cover again sometime this week.
Extraordinary claims require extraordinary evidence.

NHCharger

Dino. Just have someone turn the engine while you check for #1 to come to TDC. I had my son turn the engine while I stuck a wire into the plug hole to feel the piston at TDC.
72 Charger- Base Model
68 Charger-R/T Clone
69 Charger Daytona clone
79 Lil Red Express - future money pit
88 Ramcharger 4x4- current money pit
55 Dodge Royal 2 door - wife's money pit
2014 RAM 2500HD Diesel

myk

Quote from: NHCharger on June 15, 2014, 08:41:30 PM
Dino. Just have someone turn the engine while you check for #1 to come to TDC. I had my son turn the engine while I stuck a wire into the plug hole to feel the piston at TDC.

But...the piston could either be on the compression or the exhaust stroke...

Dino

I need to do this by myself.  I can turn the engine a bit with a wrench and feel for the piston, but I can't so it at the same time.  If I need to do this by watching the valves then that's what I'll do, no biggie.   :2thumbs:
Extraordinary claims require extraordinary evidence.

b5blue

Get or make a remote starter switch Dino!
http://www.harborfreight.com/12-volt-remote-starter-switch-35448.html
Just jump the starter relay and tap the switch.  :2thumbs:

cudaken

Quote from: b5blue on June 16, 2014, 06:15:44 AM
Get or make a remote starter switch Dino!
http://www.harborfreight.com/12-volt-remote-starter-switch-35448.html
Just jump the starter relay and tap the switch.  :2thumbs:

Dino, I used a remote switch as well. Put your finger over the hole and start bumping the starter. When I felt some compression in #1 I just cranked the motor rest of the way by hand till it was on TDC using the timing ring. It took me a whole 5 minutes?  :shruggy:

I did use a long 1/2 drive socket and breaker bar so that helped.

Ken
I am back

71 SE3834V

Dino, I told you to let me know.
I've got a remote start button, socket set up to 2", breaker bars, compression testers, fingers, timing lights and time. Been there, done this many times.
71 Charger SE 383 4V
72 Galaxie 500 400 2V

71 SE3834V

I'll tell you what, I'll help you find TDC and you can help me replace my cam. Ugh!
71 Charger SE 383 4V
72 Galaxie 500 400 2V

maxwellwedge

Quote from: BSB67 on June 11, 2014, 05:20:49 AM
Personally, for fast, easy and works every time, I'd go finger in the hole.

x300!  :2thumbs:

Get a friend or a cheap remote starter switch to bump the engine over with the starter motor.  
pull the coil wire to make sure the mill doesn't fire.
stick your finger in #1
Bump the engine a tick at a time until you feel the compression trying to knock your finger out of the hole....you will know when it happens!
Look at the timing mark on the dampener. Should be coming close to the degree marks on the timing cover. Spin the engine a tick more (better with a socket at this point) until the mark lines up with "0"
Make sure your dizzy gear is indexed so the slot is more or less parallel with the centerline of the engine. Pop in your dizzy. Your rotor position will now be at #1

This should get you close enough to fire....you may need to twist it a tick each way.
Fire it. Time it. Lock it down, burn rubber.  :lol:

Dino

Hey guys, car work time has been very limited but I'm trying to catch up.  School's almost over, a few more exams and I'm done for a while.

If need be I can rig up a remote starter switch from parts I have.  

71 SE3834V I had forgotten about your offer, sorry and thanks!   :icon_smile_big:

If you need help with a cam I'm happy to help, but I know squat about it so don't expect too much.   :lol:

I'm going try the finger trick first, and I may just pull the valve cover again.  There's really no way to tell the compression stroke of #1 by looking at the drivers side valves?
Extraordinary claims require extraordinary evidence.

71 SE3834V

You can tell you're on the compression stroke when the #1 rockers are no longer moving but you won't be able to tell if you're exactly on TDC unless you can see the piston through the plug hole or looking for the timing mark on the damper assuming it hasn't moved.
I would hook up a remote start button, put finger on hole, (I wasn't going to touch the above statement about finger in hole), bump starter until you feel compression, then look at the damper and you should be able to see the mark just CCW of the 0 on the scale. At this point use socket to roll engine to align up the mark. Might have to work underneath but I understand you have the rad out see it's easy from the topside. Put white paint on the mark. Very helpful when using timing light.
Don't over think it. In the time it took to write all this it coulda been done.

No knowledge needed to help me. Sometimes having someone to just clean parts is a big help. If you're interested in learning some things let me know. I know you're busy so my bargin was in jest. My offer is still good!
I just confirmed yesterday I have a wiped out cam. Now I've opened a can of worms as far as "how far do I go in this project".   I just wanted a car I could drive around and have a little fun with. I already have one in my '72 Galaxie but it's no "Charger"! I'll have to start a thread about my sad sack story so I can get some advice/encouragement/costs to help me figure this out.
71 Charger SE 383 4V
72 Galaxie 500 400 2V

Dino

I took the ds valve cover off, I needed to replace the gasket.  I had put the mark on the dampner on the zero mark a while ago.  I started turning the crank and the #1 rockers initially didn't move so I must've been on the power stroke already.  I kept turning, the rockers moved and once they stopped I could just see the dampner mark coming up so I kept turning a bit until it reached zero and the rockers did not move.  Did I find it?
Extraordinary claims require extraordinary evidence.

71 SE3834V

71 Charger SE 383 4V
72 Galaxie 500 400 2V

Dino

Quote from: 71 SE3834V on June 19, 2014, 12:52:13 PM
Yep! Easy wasn't it?

It felt a bit too easy so I'd thought I'd ask.   :icon_smile_big:

The dizzy rotor points to about 5 o' clock, the same spot as my old dizzy so that seems to work out nicely.

Alright, lemme get the valve cover back on!   :2thumbs:

Thanks for all the help peeps, I sincerely appreciate it.   :cheers:
Extraordinary claims require extraordinary evidence.