C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

ok, lets try again:DIST position

Thread Tools
 
Search this Thread
 
Old Aug 17, 2013 | 12:53 PM
  #1  
rgouette's Avatar
rgouette
Thread Starter
Racer
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2013
Posts: 412
Likes: 48
From: Auburn Maine
Default ok, lets try again:DIST position

So: 84'
dist position has been compromised.
I watched the videos of the dudes doing a dist install, finding TDC etc etc
The guy said a shortcut to finding the sync between oil pump and dist shaft is to just crack while dist is sitting on top, and let it go 'cathunk' down into the hole.
I did this.
It seems there's only one position the dist can BE in, and go down all the way..

So, I did this: snugged it up so it doesn't move.
Find TDC
Rotor is pointing toward passenger side of car, sort of toward middle of engine ish.
So, I attach plug wires starting with 1, then follow the pattern around

(I've got the ESC plug off)
It won;t start, and sounds like it's really off...Like pop pop...kinda chitty chitty bang ish

I'm just not 100% sure that the dist position is correct..

Am I missing a step?
Thanks fellas,
Rich
Reply
Old Aug 17, 2013 | 01:36 PM
  #2  
MrWillys's Avatar
MrWillys
Drifting
 
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
Default

The crankshaft rotates twice for every 720 degree cycle. Are you sure you have it to zero on the compression stroke? Did you put your finger over the spark plug hole, or watch the intake rocker arm come up and go back down before bringing it to zero? Do not disconnect the est bypass until after you've got it running. By shining a light in the distributor hole with a long screwdriver you can turn the oil pump key to get the rotor wherever you want it. Looking at the top of the distributor it turns clockwise 18436572.
Reply
Old Aug 17, 2013 | 01:36 PM
  #3  
Tom400CFI's Avatar
Tom400CFI
Team Owner
Pro Mechanic
20 Year Member
 
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Default

The way that you did it is fine...provided that you found TDC for #1 (and not TDC for another cylinder), and also, the TDC you found was compression and not between exhaust and intake strokes.

MY guess based on what you wrote is that you found TDC between exhaust and intake. You can either lift the dist and rotate the rotor 180* and drop it back in, OR use the post on the cap that you chose for #1, and use it for #6 and then follow the firing order clockwise from there.

Mr *****'s and I posted at the same time, saying basically the same thing.
Reply
Old Aug 17, 2013 | 01:40 PM
  #4  
lozer's Avatar
lozer
Instructor
 
Joined: Nov 2011
Posts: 222
Likes: 0
Default

An easy and quick way to find tdc is to get a compression tester piece (the part that screws into the plug hole and fab up a whistle on the other end. when the whistle starts making noise you know your just about there. Then move the crank slowly till the marks line up (assuming it has not spun.)
Reply
Old Aug 17, 2013 | 01:43 PM
  #5  
rgouette's Avatar
rgouette
Thread Starter
Racer
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2013
Posts: 412
Likes: 48
From: Auburn Maine
Default

ok fellas, lemme go back out again.
btw, I'm using a pressure gauge to find TDC
but I've been assuming that when it jumps up, that that is TDC on comp stroke
Reply
Old Aug 17, 2013 | 01:56 PM
  #6  
rgouette's Avatar
rgouette
Thread Starter
Racer
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2013
Posts: 412
Likes: 48
From: Auburn Maine
Default

did the #6 #1 swap
sounds worse
So: the assumption then, is that #1TDC compression stroke hasn't been found yet

maybe it's time to do the straw in the cylinder check?
Reply
Old Aug 17, 2013 | 02:01 PM
  #7  
rgouette's Avatar
rgouette
Thread Starter
Racer
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2013
Posts: 412
Likes: 48
From: Auburn Maine
Default

though, I don;t get how a gauge can be wrong..

;(
Reply
Old Aug 17, 2013 | 02:54 PM
  #8  
lozer's Avatar
lozer
Instructor
 
Joined: Nov 2011
Posts: 222
Likes: 0
Default

Probably a silly question but you are on cyl #1 right?

http://www.autozone.com/autozone/rep...00c1528008493f

Bottom diagram (i know not correct year but its the same damn thing)

Also when you find tdc the rotor should be pointing to #1 plug wire. (driver side headlight) It sounds like the oil pump tab might be off also. (long screwdriver and adjust)

Last edited by lozer; Aug 17, 2013 at 02:57 PM.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-1

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-2

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-3

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-4

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-5

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-6

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-7

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-8

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-9

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
Old Aug 17, 2013 | 03:12 PM
  #9  
floridamale's Avatar
floridamale
Safety Car
10 Year Member
 
Joined: Jan 2008
Posts: 3,939
Likes: 1
From: Vero Beach Florida
Default

Originally Posted by celticpiping
Rotor is pointing toward passenger side of car, sort of toward middle of engine ish.

(I've got the ESC plug off)
With the rotor at TDC # 1 it should be pointing at drivers side front plug, if it's not then as mentioned in a earlier post reposition the shaft and gear that drive the rotor
Reply
Old Aug 17, 2013 | 03:30 PM
  #10  
WW7's Avatar
WW7
Le Mans Master
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Aug 2007
Posts: 8,735
Likes: 412
From: WV
Default

And for Gods sake, when you do find #1 TDC , put a mark on the back of the plenum, so next time you can just drop the distributor in until the rotor lines up with that mark...
If you put your finger over the #1 hole, then rotate the crank until it blows your finger off the hole, then continue to rotate the crank around until you bring it to "0"....You can't go wrong finding #1 TDC doing it this way. Of course all the other ways work also..WW

Last edited by WW7; Aug 17, 2013 at 03:33 PM.
Reply
Old Aug 17, 2013 | 04:03 PM
  #11  
lozer's Avatar
lozer
Instructor
 
Joined: Nov 2011
Posts: 222
Likes: 0
Default

Also if you look at the bottom of the dist gear you will notice that the oil pump drive points to 1 plug also.

this might be a better article on install.
http://www.classiccarauto.com/impala...tributor.shtml
Reply
Old Aug 17, 2013 | 04:08 PM
  #12  
rgouette's Avatar
rgouette
Thread Starter
Racer
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2013
Posts: 412
Likes: 48
From: Auburn Maine
Default

I manually turned the pump gear to point. To no 1

If Didn't help , sadly . Still wont run
Not sure if the guys right about the HB or not
Just the thought of that now being bad kinda gets my blood pumping.
Not good
Pretty depressed right now
I've been working on thus car in my Back yard for weeks now , and its getting old...

You know it how it goes
Oh we'll
Thanks fellas
Reply
Old Aug 17, 2013 | 04:32 PM
  #13  
corvetteronw's Avatar
corvetteronw
Race Director
Supporting Lifetime
20 Year Member
Veteran: Army
St. Jude 10 Year Donor
Liked
 
Joined: Feb 2003
Posts: 16,475
Likes: 270
From: Kingman AZ
Cruise-In VII Veteran
Cruise-In VIII
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
Default

I too am putting in a new distributor. I was going from a small cap distributor setup to the stock distributor but it has been a long time since I had the stock setup and I had forgotten how it actually set in the engine bay and could find no pictures. The diagrams in the FSM were all "partial" ones or you could not see where the square block on the cap set due to the rear plenum cover extension blocking the view.
I, of course, stuck it in so the square block ended up on the passenger side of the engine. I soon found out that the coil plug and the tach plug would not reach that go in the square block unless the distributor is installed with that block on the driver's side.
So, I just lifted the distributor out of the block far enough to disengage the gears and spin the base of the distributor around so that my tach and coil wires would go in correctly. I then lowered it back in to position and removed the #1 spark plug and checked it again. Here is what you do now:
1. Remove spark plug #1 (the first one toward the front of the engine on the driver's side).
2. Have a helper rotate the engine clockwise with a long handled ratchet wrench with q 5/8" deep socket on the crank bolt.
3. Put a finger over the #1 spark plug hole (it does not have to be tight). Turn down the country rap so you can listen and feel the air as it starts to come out of the hole. This is the compression stroke.
4. Shine a light on the timing marker and keep turning the crank until the timing mark (mine is set at 6* before Top Dead Center) lines up.
5. Pull the distributor out until the gear disengages, then set it down until it just starts to engage the gears but is not fully seated. Use a straight edge to see if the rotor is pointing somewhere between the #3 and #5 plugs (the 2nd and 3rd plugs from the driver's side of the front of the engine). As you push it farther down so that the gear engages then your rotor should be pointing at the left front outer corner of the driver's side valve cover. The base of the distributor will probably be about 1/4" off the block due to the fact that the bottom tab is not fully seated into the oil pump. Then simply have your helper rotate the engine clockwise again as you gently push down on the distributor plate. When it drops in the rest of the way you will be all set. Even though the engine has turned a bit, the rotor has turned with it.
6. Fire that bad boy up and check with your timing light to see that everything is set correctly.
7, Tighten the clamp down fully, reconnect the EST plug and pop a well deserved cold one!
You are just too stressed right now, not trusting yourself and overthinking things.
Now - if your timing is still off then that means your harmonic balancer has slipped - but I think you will find that this works.
I just did this procedure last night and it worked and I am one of the biggest garage screwups you have ever met. If it is impossible to install a certain part the wrong way then I will find that way! I embarrass myself all the time.

Last edited by corvetteronw; Aug 17, 2013 at 04:35 PM.
Reply
Old Aug 17, 2013 | 04:48 PM
  #14  
rgouette's Avatar
rgouette
Thread Starter
Racer
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2013
Posts: 412
Likes: 48
From: Auburn Maine
Default

I think I pretty much followed that procedure for the most part
Then I dropped the dist hold down bolt, and never found it: just about lost it after 15 minutes of searching .

I'm not gonna start doing things like harm balancers out in my backyard, so who knows, might be done with it.

Either way, thanks tons for the post
Reply
Old Aug 17, 2013 | 07:11 PM
  #15  
HlhnEast's Avatar
HlhnEast
Safety Car
 
Joined: Nov 2008
Posts: 4,328
Likes: 15
From: Jacksonville FL
Default

Yeah just take a break. Rolling around in the dirt isnt fun, I just finished doing this, replacing head gaskets after the heads were reworked and discovered the water pump was leaking profusely. It took me 3 tries to get the valves adjusted properly with the FSM sitting right in front of me. Luckily I didnt damage anything.

Setting valve timing also requires you to find TDC. Find and mark the timing mark on the balancer. Take the LS valve cover off, put your hand on the #1 valves with fingers on the head. Rotate the engine with a long ratchet with a 5/8" socket as mentioned. Pay attention for movement in the #1 valves. If the valves move as you are rotating the engine to the timing mark, you are approaching the #6 TDC, which is 180* out from #! and #1 is on the exhaust stroke. If the valve do not move then you are at #1 at the firing stroke. Make sure the oil pump is lined up and yes, the rotor button should point towards #1. As mentioned, you have to start the dist. gear at about the 3-5 area so it rotates down to the #1. The square electrical connection on the cap should be on the drivers side and the #1-#8 will more or less be at the rear of your plenum. Even at 0* the car should crank. Then disconnect the EST and set to 6*.

Check everything again and if it is all correct then go on to something else after you had your break and are thinking clearer again. Frustration will lead to errors and if the work is right dont keep second guessing it, there is another problem. I spend a couple of days working on brake cylinders I rebuilt going over and over the same work only to discover my front brake hoses had collapsed.

Good luck!
Reply
Old Aug 17, 2013 | 07:15 PM
  #16  
rgouette's Avatar
rgouette
Thread Starter
Racer
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2013
Posts: 412
Likes: 48
From: Auburn Maine
Default

great advice,thx
Reply
Old Aug 17, 2013 | 07:34 PM
  #17  
ghoastrider1's Avatar
ghoastrider1
Le Mans Master
15 Year Member
 
Joined: May 2006
Posts: 7,708
Likes: 266
From: indy indiana
Default

standing at the front of the car,looking toward the windshield, number one is on the right (drivers) front side, the plug closest to you. All plugs on that side are odd numbered.1/3/5/8. the otherside, starting from the front, 2/4/6/8. NOW., looking again towards the windshield. drawing a line from you to the windshield, number on hole on the dist cap should be just to the right of that line with number 8 just to the left of that line. With line on dampner lined up with about 8 degrees, rotor cap should be pointed at ,or near, number one sparkplug wire/tower. should start. If not, tuen all the way around again, then have it pointed at number one tower. should start. Yep, cheapest way to tell when compression stroke is coming up is to put your finger over number one hole. Do NOT stick finger in hole, just over hole. If you were closer, I would come help.
Reply

Get notified of new replies

To ok, lets try again:DIST position





All times are GMT -4. The time now is 12:56 PM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE