C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Pulling The Motor, Don't Know What Else To Do

Thread Tools
 
Search this Thread
 
Old Oct 3, 2005 | 08:41 PM
  #41  
dath's Avatar
dath
Burning Brakes
 
Joined: Jul 2000
Posts: 1,162
Likes: 2
From: Beaverton, OR
Default

At this point, I'd probably pull the timing cover and have a look since it seems you've done nearly everything else. The scrraaaank you describe may have been something in there. Also, have you verified that the balancer TDC is actually TDC? The balancer may have slipped a whole lot . . . Normally a srrrrank noise while trying to turn the engine over is due to the starter gears not fully engaging the flywheel/flexplate ring. . .

-dath
Reply
Old Oct 3, 2005 | 08:43 PM
  #42  
David Ey's Avatar
David Ey
Burning Brakes
Supporting Lifetime
 
Joined: Sep 2004
Posts: 1,167
Likes: 2
From: Ft.Worth Texas
Default

You need to find tdc reguardless of what the timing mark shows. Turn ingnition switch on. Remove valve cover and watch valve action of #1 and feel what #1 piston is doing. When intake is opening piston should be going down sucking in fuel. Shortly before it starts back up both intake and exhaust should be closed. Have a friend hold on to plug wire and before piston reaches top your friend should let out a yelp and might even hit you. At that point look at crank pulley and it should be approaching the mark. If it isn't either your cam/crank relationship is out or your dist./cam relation is out, or both. If you can gather up eight friends each one can hold their own plug wire. Make sure they are touching something grounded to the motor too. Which ever one hollers, trace the wire and determine which plug it is going to then you can cipher by removing the dist cap what may be wrong there and maybe it's only a plug wire distribution problem.
However I still think that dist gear needs a look at. It may have been put on 180* out or sheared the pin.
Good luck, we's ah pullin fer ya.

Last edited by David Ey; Oct 3, 2005 at 09:23 PM.
Reply
Old Oct 3, 2005 | 08:45 PM
  #43  
yukon988's Avatar
yukon988
Racer
15 Year Member
 
Joined: Aug 2005
Posts: 431
Likes: 0
From: Oita, Japan
Default

Originally Posted by nastee383
I've seen some posts that say it's possible for a chain to jump a couple of teeth. Maybe thats what happened when I heard that loud "SCRRRRANK" when cranking one time.
That would be my guess.
Reply
Old Oct 3, 2005 | 08:46 PM
  #44  
David Ey's Avatar
David Ey
Burning Brakes
Supporting Lifetime
 
Joined: Sep 2004
Posts: 1,167
Likes: 2
From: Ft.Worth Texas
Default

Originally Posted by nastee383
When I pull the motor the timing cover is one of the first things thats coming off. Now remember it was running just fine before. No points its an HEI.
Just fine before what?

Also, have a good look at that dist cap and rotor and center carbon in cap. I know they be new but they can still brake.

Last edited by David Ey; Oct 3, 2005 at 09:01 PM.
Reply
Old Oct 3, 2005 | 08:46 PM
  #45  
seaboltm's Avatar
seaboltm
Instructor
 
Joined: Sep 2005
Posts: 141
Likes: 1
Default

loud noise, wont run;

timing does not respond to changes in distributor position;

engine turn over ease does not change with distributor position;

appears there is no relationship inside the engine between valve movment and the distributor;

the link between the two is the cam;

something happened with the cam or timing chain, thats where my money is. i think you will probably have to end up at least pulling the cam. during the process of pulling the cam, you will have opportunity to verifying timeing chain and other components, and you will find your problem.

Last edited by seaboltm; Oct 3, 2005 at 08:59 PM.
Reply
Old Oct 3, 2005 | 09:10 PM
  #46  
nastee383's Avatar
nastee383
Thread Starter
Melting Slicks
20 Year Member
 
Joined: Apr 2000
Posts: 2,145
Likes: 1
From: Ft. Walton Beach, Fl USA
Default

Originally Posted by ltlevil
That's what I was getting at in the earlier post. A couple of other things to look at-Did you change any wiring when hooking up the Accel unit? If so make sure you have 12 volts going into the distributor while turning the engine over. Another thing to look at is the control module in the distributor. If this is suspect it is best to replace the pick up and the module at the same time. I would also see if the oil pump shaft can turn freely with the distrib removed. I have seen more than once where the oil pump froze up and either broke the cam, sheared the distrib pin or broke the ger on either the cam or distrib. These are just some more things to look at, it's hard to diagnose things like this from cyberspace, but I would be hard pressed to pull the motor until I found out the problem.
I've done alot of wiring on this vehicle. It is a V8 conversion. The motor was running before, very well. The ACCEL unit was wired up then and no changes have been made. Its fairly simple to wire it up anyway. Everything I had wired/rewired was working, which actually surprised me. I put all new gauges, fuel system, electric fan, line lock, aux fuse block, 2 stage N20, N2O purge, etc., etc.

I've had the distributor out and the gear is fine. I had to adjust the oil pump shaft to position the distributor and it turned normally. I put the distributor from my Vette in it and it made no difference.

Believe me, pulling the motor is a last resort. Everything is a tight fit on this vehicle.
Reply
Old Oct 3, 2005 | 09:15 PM
  #47  
David Ey's Avatar
David Ey
Burning Brakes
Supporting Lifetime
 
Joined: Sep 2004
Posts: 1,167
Likes: 2
From: Ft.Worth Texas
Default

What kind of car are we working on here?
Reply
Old Oct 3, 2005 | 09:16 PM
  #48  
ferndog4's Avatar
ferndog4
Instructor
20 Year Member
 
Joined: Dec 2003
Posts: 183
Likes: 0
From: ca
Default

Nasty,

Did you check the ignition module in the HEI? I also have the Accell 300+ ignition system and could not get my car to start. I checked everyting a few times, spark, fuel, try with accell w/o accell before I eventually replaced the module and sure enough, back to life.

Not sure you already addressed it but just thought it might be worth looking into.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

 Michael S. Palmer
story-1

5 Best & 5 Worst Corvette Daily Drivers

 Joe Kucinski
story-2

The Headlights of Every Corvette Generation Explained

 Joe Kucinski
story-3

5 Best & 5 Most Overrated Corvette Track Packages of All Time!

 Joe Kucinski
story-4

Every 2027 Corvette Engine Explained

 Joe Kucinski
story-5

Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

 Verdad Gallardo
story-6

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-7

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-8

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-9

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
Old Oct 3, 2005 | 09:21 PM
  #49  
nastee383's Avatar
nastee383
Thread Starter
Melting Slicks
20 Year Member
 
Joined: Apr 2000
Posts: 2,145
Likes: 1
From: Ft. Walton Beach, Fl USA
Default

Originally Posted by seaboltm
loud noise, wont run;

timing does not respond to changes in distributor position;

engine turn over ease does not change with distributor position;

appears there is no relationship inside the engine between valve movment and the distributor;

the link between the two is the cam;

something happened with the cam or timing chain, thats where my money is. i think you will probably have to end up at least pulling the cam. during the process of pulling the cam, you will have opportunity to verifying timeing chain and other components, and you will find your problem.
This is exactly what I'm thinking. I've done all I know to do externally and even did some things I didn't know based on advice received here. The fact that the motor doesn't respond to timing input via the distributor position makes me think the problem is internal.
Reply
Old Oct 3, 2005 | 09:26 PM
  #50  
David Ey's Avatar
David Ey
Burning Brakes
Supporting Lifetime
 
Joined: Sep 2004
Posts: 1,167
Likes: 2
From: Ft.Worth Texas
Default

When you turn engine over and hold hand over carb do you feel a suction or both a suction and a pressure? With all spark plugs in, of course

Last edited by David Ey; Oct 3, 2005 at 10:19 PM.
Reply
Old Oct 3, 2005 | 09:49 PM
  #51  
GrandSportC3's Avatar
GrandSportC3
Team Owner
 
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Default

Hmmm.. have you thought about pulling off the timing chain cover to see if there's anything wrong with it?
Reply
Old Oct 3, 2005 | 09:55 PM
  #52  
GrandSportC3's Avatar
GrandSportC3
Team Owner
 
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Default

If you'd be a little bit closer, I'd love to take a look at that engine..

Here's what I'd do:

1) get a HEI distributor with the internal coil from the junkyard or from a friend and try to get the car running with the HEI.
2) set the idle very high and basline the idle mixture (1.5 turns left after they are completely in (on the idle mixture screws))
3) if that doesn't work, I'd check the timing chain.
Reply
Old Oct 4, 2005 | 08:11 AM
  #53  
69396Chevy's Avatar
69396Chevy
Instructor
 
Joined: Feb 2005
Posts: 153
Likes: 1
From: Monroe MI
Default

Im thinking taking the cover off will show whats wrong, could have sheard off a few teeth making thats SCRAAAANK sound
Reply
Old Oct 4, 2005 | 08:26 AM
  #54  
ltlevil's Avatar
ltlevil
Burning Brakes
 
Joined: Apr 2004
Posts: 847
Likes: 0
From: Des Allemands LA
Default

Originally Posted by nastee383
I've done alot of wiring on this vehicle. It is a V8 conversion. The motor was running before, very well. The ACCEL unit was wired up then and no changes have been made. Its fairly simple to wire it up anyway. Everything I had wired/rewired was working, which actually surprised me. I put all new gauges, fuel system, electric fan, line lock, aux fuse block, 2 stage N20, N2O purge, etc., etc.

I've had the distributor out and the gear is fine. I had to adjust the oil pump shaft to position the distributor and it turned normally. I put the distributor from my Vette in it and it made no difference.

Believe me, pulling the motor is a last resort. Everything is a tight fit on this vehicle.
Guess I mis understood about the accel unit, thought it was added with the other stuff being in place and working. Hate to say it but sure is sounding more and more like a broke cam, gear or timing chain. Keep us filled in on what's going on, I for one am very interested to see what the culprit is in this situation. Good Luck.

ltlevil
Reply
Old Oct 4, 2005 | 09:52 AM
  #55  
David Ey's Avatar
David Ey
Burning Brakes
Supporting Lifetime
 
Joined: Sep 2004
Posts: 1,167
Likes: 2
From: Ft.Worth Texas
Default

Well,just feeling how it breathes at the carb should tell a lot and don't take but a second.
Reply
Old Oct 4, 2005 | 10:02 AM
  #56  
GDaina's Avatar
GDaina
Race Director
Supporting Lifetime Gold
20 Year Member
 
Joined: Feb 1999
Posts: 16,978
Likes: 7
From: In Dreams There Is Truth Ohio
Default

No need to pull the motor, just yet...as everyone has mentioned, pull the distributor and look at the gear, pull the timing cover....if the chain is still on, line up the dots. This way you're assured you're on TDC.

The problem is either in valve timing or ignition. Forget that it ran yesterday, today is what you have to focus on.
Reply
Old Oct 4, 2005 | 11:58 AM
  #57  
nastee383's Avatar
nastee383
Thread Starter
Melting Slicks
20 Year Member
 
Joined: Apr 2000
Posts: 2,145
Likes: 1
From: Ft. Walton Beach, Fl USA
Default

Originally Posted by David Ey
What kind of car are we working on here?
1994 GMC S15 Jimmy
Reply

Get notified of new replies

To Pulling The Motor, Don't Know What Else To Do

Old Oct 4, 2005 | 12:03 PM
  #58  
nastee383's Avatar
nastee383
Thread Starter
Melting Slicks
20 Year Member
 
Joined: Apr 2000
Posts: 2,145
Likes: 1
From: Ft. Walton Beach, Fl USA
Default

Originally Posted by ferndog4
Nasty,

Did you check the ignition module in the HEI? I also have the Accell 300+ ignition system and could not get my car to start. I checked everyting a few times, spark, fuel, try with accell w/o accell before I eventually replaced the module and sure enough, back to life.

Not sure you already addressed it but just thought it might be worth looking into.
When I swapped the working distributor from my Vette that took care of troubleshooting the distributor components. It made no difference in the Jimmy. I've also bypassed the 300+. The only difference was the spark was BIGGER with the 300+ hooked up.
Reply
Old Oct 4, 2005 | 12:06 PM
  #59  
nastee383's Avatar
nastee383
Thread Starter
Melting Slicks
20 Year Member
 
Joined: Apr 2000
Posts: 2,145
Likes: 1
From: Ft. Walton Beach, Fl USA
Default

Originally Posted by David Ey
When you turn engine over and hold hand over carb do you feel a suction or both a suction and a pressure? With all spark plugs in, of course
I don't put any of my body parts over the carb anymore. Guess why?
Reply
Old Oct 4, 2005 | 12:07 PM
  #60  
nastee383's Avatar
nastee383
Thread Starter
Melting Slicks
20 Year Member
 
Joined: Apr 2000
Posts: 2,145
Likes: 1
From: Ft. Walton Beach, Fl USA
Default

Originally Posted by GrandSportC3
Hmmm.. have you thought about pulling off the timing chain cover to see if there's anything wrong with it?
Thats part of my future plans.
Reply



All times are GMT -4. The time now is 06:54 PM.

story-0
2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

Slideshow: Is the 2027 Chevrolet Silverado 1500 the best Silverado yet?

By Michael S. Palmer | 2026-06-16 08:01:12


VIEW MORE
story-1
5 Best & 5 Worst Corvette Daily Drivers

Slideshow: 5 best and 5 worst Corvette daily drivers

By Joe Kucinski | 2026-06-15 10:32:13


VIEW MORE
story-2
The Headlights of Every Corvette Generation Explained

Slideshow: The headlights of every Corvette generation explained

By Joe Kucinski | 2026-06-15 10:17:14


VIEW MORE
story-3
5 Best & 5 Most Overrated Corvette Track Packages of All Time!

Slideshow: The 5 best and 5 most overrated Corvette track packages ever.

By Joe Kucinski | 2026-06-09 12:46:45


VIEW MORE
story-4
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

By Joe Kucinski | 2026-06-09 12:16:31


VIEW MORE
story-5
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.

By Verdad Gallardo | 2026-06-08 19:53:43


VIEW MORE
story-6
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-7
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-8
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-9
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