Generation III Internal Engine 1997-2006 LS1 | LS6
Sponsored by:
Sponsored by:

Hard turning of 408 stroker

Thread Tools
 
Search this Thread
 
Old Sep 7, 2018 | 04:57 PM
  #21  
Philhippy45's Avatar
Thread Starter
TECH Regular
iTrader: (5)
 
Joined: Mar 2016
Posts: 458
Likes: 5
Default

Originally Posted by VandykeT/A
Scratch that on the converter just seen no trans. If the flexplate isn’t some how dished wrong and rubbing I would imagine it’s something in the rotating assembly
it all spins but my torque bar is maxed at 150 now I don't feel anything grabbing anywhere and my batter fully charged won't turn the flex plate it just has a clicking noise but it's engaged to the flex plate
Reply
Old Sep 7, 2018 | 05:03 PM
  #22  
00pooterSS's Avatar
TECH Veteran
15 Year Member
Photogenic
Liked
Community Favorite
iTrader: (40)
 
Joined: Mar 2008
Posts: 4,920
Likes: 531
From: Dallas
Default

Pull the rocker arms off and try it.



Also when a starter just clicks, either you have a bad connection or a bad starter. The bad connection is usually at the battery, pull the terminals and clean them with water and a metal bristle brush. Or it's just clicking because the engine is seized
Reply
Old Sep 7, 2018 | 05:09 PM
  #23  
Philhippy45's Avatar
Thread Starter
TECH Regular
iTrader: (5)
 
Joined: Mar 2016
Posts: 458
Likes: 5
Default

Originally Posted by 00pooterSS
Pull the rocker arms off and try it.



Also when a starter just clicks, either you have a bad connection or a bad starter. The bad connection is usually at the battery, pull the terminals and clean them with water and a metal bristle brush. Or it's just clicking because the engine is seized
could my jumper cables be to small? Its 10' 10awg. And I can turn the engine by hand with the torque bar.
Reply
Old Sep 7, 2018 | 05:18 PM
  #24  
Philhippy45's Avatar
Thread Starter
TECH Regular
iTrader: (5)
 
Joined: Mar 2016
Posts: 458
Likes: 5
Default Update!!!

The starter spins it now apparently a screw driver that isn't crap and shorter thicker cables work great now I'm gonna run it for a few seconds and see it ran good and continuous alot of air came out of the exhaust ports is that normal sinve no combustion is happening?
Reply
Old Sep 7, 2018 | 05:18 PM
  #25  
qweedqwag's Avatar
11 Second Club
 
Joined: Dec 2016
Posts: 665
Likes: 5
Default

Rods installed wrong?
Reply
Old Sep 7, 2018 | 05:45 PM
  #26  
Philhippy45's Avatar
Thread Starter
TECH Regular
iTrader: (5)
 
Joined: Mar 2016
Posts: 458
Likes: 5
Default

Originally Posted by qweedqwag
Rods installed wrong?
starter turned it over fine I hear no binding once so ever or hear the starter bogging down if their is a tight spot. It got a little easier to turn the crank no much just a little. And there is oil flow because I can see it coming and flowing to the head. So Idk what else of could be?
Reply
Old Sep 7, 2018 | 07:21 PM
  #27  
VandykeT/A's Avatar
10 Second Club
10 Year Member
 
Joined: Jan 2010
Posts: 2,317
Likes: 20
From: Hurley, VA
Default

With just the crank in the block it should roll easily with one finger. They’re no way it should take that much effort to turn it with the plugs out. I would pull the rockers just for peace of mind. The valves could be contacting just enough to cause friction and not enough to lock the motor. I’m gonna say something in the bottom is tight. Even a little tight on the crank can turn but once you add the weight of everything it amplifies it.
Reply
Old Sep 7, 2018 | 08:03 PM
  #28  
Philhippy45's Avatar
Thread Starter
TECH Regular
iTrader: (5)
 
Joined: Mar 2016
Posts: 458
Likes: 5
Default

Originally Posted by VandykeT/A
With just the crank in the block it should roll easily with one finger. They’re no way it should take that much effort to turn it with the plugs out. I would pull the rockers just for peace of mind. The valves could be contacting just enough to cause friction and not enough to lock the motor. I’m gonna say something in the bottom is tight. Even a little tight on the crank can turn but once you add the weight of everything it amplifies it.
when it was just the crank it turned really easy as I added the pistons it got harder and harder. Then I added the heads and it was harder yet. With the plugs in I could turn it and hear the air seeping out as I had no push rods in yet. When I removed the plugs it was a little easier not like this though. I mean since the starter pushed oil through it Deffinitly got easier then it was before. Maybe just the oil dried up. But when I turn it with the torque bar it takes less effort then it did before. So I will let the battery charge more and then try it again and let more oil flow through I'll try it with plugs in too maybe I'll see a change in it. My machine shop said it could be because the cam and the compression ratio even without plugs im still fighting high compression since the tiny little hole can't expel the air fast enough. Idk.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Sep 7, 2018 | 08:29 PM
  #29  
G Atsma's Avatar
TECH Senior Member
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2016
Posts: 22,291
Likes: 3,616
From: Central Cal.
Default

That little spark plug hole will relieve compression as fast as an open valve. You are NOT fighting compression with the plugs out.... You sound like such an engine newbee.
Reply
Old Sep 7, 2018 | 09:00 PM
  #30  
Philhippy45's Avatar
Thread Starter
TECH Regular
iTrader: (5)
 
Joined: Mar 2016
Posts: 458
Likes: 5
Default

Originally Posted by G Atsma
That little spark plug hole will relieve compression as fast as an open valve. You are NOT fighting compression with the plugs out.... You sound like such an engine newbee.
lol that's what the machine shop guy said not me. I figured that and that fact the exhaust port opens to it would be that.
Reply
Old Sep 8, 2018 | 06:30 AM
  #31  
ddnspider's Avatar
10 Second Club
20 Year Member
Liked
Loved
Community Favorite
iTrader: (26)
 
Joined: Aug 2004
Posts: 14,628
Likes: 1,778
From: FL
Default

I can't believe the rockers haven't been pulled yet to see if it gets better. Otherwise I wonder if the bore wasn't machined right for the pistons and rings and they're too tight. Once they got moving it would easier but the initial push would be tough.
Reply
Old Sep 8, 2018 | 02:04 PM
  #32  
Philhippy45's Avatar
Thread Starter
TECH Regular
iTrader: (5)
 
Joined: Mar 2016
Posts: 458
Likes: 5
Default

Originally Posted by ddnspider
I can't believe the rockers haven't been pulled yet to see if it gets better. Otherwise I wonder if the bore wasn't machined right for the pistons and rings and they're too tight. Once they got moving it would easier but the initial push would be tough.
with rockers off it's a little easier not as hard to turn but still hard.
Reply
Old Sep 8, 2018 | 02:06 PM
  #33  
Che70velle's Avatar
ModSquad
10 Year Member
Community Builder
Liked
Loved
iTrader: (6)
 
Joined: Jan 2012
Posts: 7,828
Likes: 5,176
From: Dawsonville Ga.
Default

Originally Posted by Philhippy45
with rockers off it's a little easier not as hard to turn but still hard.
When you put the cam in it, how did it turn?
Reply
Old Sep 8, 2018 | 02:09 PM
  #34  
Philhippy45's Avatar
Thread Starter
TECH Regular
iTrader: (5)
 
Joined: Mar 2016
Posts: 458
Likes: 5
Default

Originally Posted by Che70velle


When you put the cam in it, how did it turn?
kind of the same with out it.
Reply
Old Sep 8, 2018 | 02:27 PM
  #35  
ddnspider's Avatar
10 Second Club
20 Year Member
Liked
Loved
Community Favorite
iTrader: (26)
 
Joined: Aug 2004
Posts: 14,628
Likes: 1,778
From: FL
Default

Originally Posted by Philhippy45
with rockers off it's a little easier not as hard to turn but still hard.
Then it sounds like everything got worse when the pistons went in....specs right on the bore and piston size?
Reply
Old Sep 8, 2018 | 02:53 PM
  #36  
RB04Av's Avatar
TECH Addict
5 Year Member
Photogenic
Liked
Top Answer: 1
 
Joined: Dec 2017
Posts: 2,180
Likes: 969
Default

If it's taking over 100 ft-lbs on the crank to turn it, something isn't right.

A V8 short block, freshly built, with typical tension rings (not "low") and good fresh bores, should take around 30 - 35.

As said above, with just the crank in, it should spin easily by hand; you should be able to grab the snout, spin it with a flick of the wrist, and it should keep spinning for a half-turn or more before it stops. Then, as you add pistons it should get progressively harder for each one, by about the same amount each time. With the first few pistons it should spin easily as the pistons go through TDC and BDC but as you add more it should get more uniform all the way round as you turn it. Adding the cam shouldn't be noticeable at all. Putting on the heads should make no difference whatsoever. Putting in the rest of the valve train should add a few ft-lbs, maybe 5 - 10. So all the way put together it might take 40 - 50 ft-lbs on the crank. Accessories might add a few more.

Does it turn easier with the belt off?
Reply
Old Sep 8, 2018 | 03:24 PM
  #37  
G Atsma's Avatar
TECH Senior Member
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2016
Posts: 22,291
Likes: 3,616
From: Central Cal.
Default

Tear it apart.....
Reply
Old Sep 8, 2018 | 03:40 PM
  #38  
Darth_V8r's Avatar
Moderator
10 Year Member
Liked
Loved
Community Favorite
iTrader: (4)
 
Joined: Jul 2014
Posts: 10,451
Likes: 1,873
From: My own internal universe
Default

Its time to start checking rid and main bearing clearances imo.
Reply
Old Sep 8, 2018 | 04:02 PM
  #39  
Che70velle's Avatar
ModSquad
10 Year Member
Community Builder
Liked
Loved
iTrader: (6)
 
Joined: Jan 2012
Posts: 7,828
Likes: 5,176
From: Dawsonville Ga.
Default

How did it turn when you checked PTV? I didn’t see an answer to this question earlier.
Reply
Old Sep 8, 2018 | 04:14 PM
  #40  
Philhippy45's Avatar
Thread Starter
TECH Regular
iTrader: (5)
 
Joined: Mar 2016
Posts: 458
Likes: 5
Default

Originally Posted by Che70velle
How did it turn when you checked PTV? I didn’t see an answer to this question earlier.
ptv is good
Reply



All times are GMT -5. The time now is 07:45 PM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE