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

1972 c3

Thread Tools
 
Search this Thread
 
Old Oct 5, 2014 | 01:03 PM
  #1  
rsonjohn's Avatar
rsonjohn
Thread Starter
4th Gear
 
Joined: Aug 2014
Posts: 4
Likes: 0
Default 1972 c3

Is there a solution to the issue of a 455ci being hard to turn over when the engine is warmed up and at operating temperature? Cranks over fine when cold but not when warmed up.

Thanks
Reply
Old Oct 5, 2014 | 01:14 PM
  #2  
bluedawg's Avatar
bluedawg
Safety Car
 
Joined: Jan 2009
Posts: 3,736
Likes: 56
From: anchorage ak
Default

First off is it a 455" or a 454" not that it matters toward your question. Secondly toward your question, a new starter, probably a stock starter, but say there's something not elaborated to, a high torque starter might be better and if all else is good a starter would fix it.. But before you buy a starter, what is your initial timing set at, do you know more about the engine, compression, cam ect. Is it stock or modified? How long sense the last rebuild? What temp does it operate at? Does it have oil leaks at the valve cover? You might not need a starter, but with out knowing specifics were only guessing.

DO MA NEU!

Last edited by bluedawg; Oct 5, 2014 at 01:16 PM.
Reply
Old Oct 5, 2014 | 01:50 PM
  #3  
rsonjohn's Avatar
rsonjohn
Thread Starter
4th Gear
 
Joined: Aug 2014
Posts: 4
Likes: 0
Default C3 454

Stock engine, rebuild approx 5000 miles ago, operates at 210 deg. I did not rebuild the engine. I suspected the timing may be advanced to far, or possibly the starter may be weak, starts fine when cold, Have not checked the timing. what would be the correct setting above top dead center?

Thanks




Originally Posted by bluedawg
First off is it a 455" or a 454" not that it matters toward your question. Secondly toward your question, a new starter, probably a stock starter, but say there's something not elaborated to, a high torque starter might be better and if all else is good a starter would fix it.. But before you buy a starter, what is your initial timing set at, do you know more about the engine, compression, cam ect. Is it stock or modified? How long sense the last rebuild? What temp does it operate at? Does it have oil leaks at the valve cover? You might not need a starter, but with out knowing specifics were only guessing.

DO MA NEU!
Reply
Old Oct 5, 2014 | 02:36 PM
  #4  
bluedawg's Avatar
bluedawg
Safety Car
 
Joined: Jan 2009
Posts: 3,736
Likes: 56
From: anchorage ak
Default

Originally Posted by rsonjohn
Stock engine, rebuild approx 5000 miles ago, operates at 210 deg. I did not rebuild the engine. I suspected the timing may be advanced to far, or possibly the starter may be weak, starts fine when cold, Have not checked the timing. what would be the correct setting above top dead center?

Thanks
I'd try a 160 or 180 degree thermostat, while 210 degrees is not off the chart, it's a lot higher than I'd prefer. Definently check your timing, and if it seems right, the next time you have starting issues try retarding it some, this might indicate that your initial is off or your curve is coming in to quick via worn out springs in the mechanical advance. It don't take much when a starter is worn down.

DO MA NEU!
Reply

Get notified of new replies

To 1972 c3





All times are GMT -4. The time now is 09:08 AM.

story-0
10 Corvettes to Drive Before You Die!

Slideshow: 10 Corvettes to drive before you die.

By Joe Kucinski | 2026-06-23 08:31:12


VIEW MORE
story-1
Corvette & Porsche 911: How Two Icons Conquered the Last 25 Years

Slideshow: Corvette and Porsche 911, how two icons conquered the last 25 years.

By Joe Kucinski | 2026-06-23 08:18:33


VIEW MORE
story-2
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-3
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-4
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-5
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-6
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

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


VIEW MORE
story-7
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-8
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-9
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