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

OK Guys, need some serious help!!

Thread Tools
 
Search this Thread
 
Old Apr 6, 2008 | 08:04 PM
  #201  
_twisted_'s Avatar
_twisted_
Safety Car
 
Joined: Nov 2004
Posts: 4,991
Likes: 5
From: The Pines South Jersey
Default

Originally Posted by Paul Ruggeri
This is sounding to me like you have an oiling system issue. Sounds like you have oil pressure, but not to the valve train. CFI-EFI is right about having to have a distributer or a facsimile for oil not to drain back into the block. You can turn the oil pump with a long screwdriver to get oil up to that point. I'm wondering if there is an issue there that's keeping oil from getting to the lifters and from there to the push rods etc. Was the distributer removed? I may be raising more questions than answers, but I'm confident our collective experience will come up with an answer.

Paul

PS What part of Cal are you headed for?
I have seen red shop rags cause headaches before
Reply
Old Apr 6, 2008 | 08:08 PM
  #202  
jsup's Avatar
jsup
Thread Starter
Team Owner
 
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Default

Originally Posted by Paul Ruggeri
This is sounding to me like you have an oiling system issue. Sounds like you have oil pressure, but not to the valve train. CFI-EFI is right about having to have a distributer or a facsimile for oil not to drain back into the block. You can turn the oil pump with a long screwdriver to get oil up to that point. I'm wondering if there is an issue there that's keeping oil from getting to the lifters and from there to the push rods etc. Was the distributer removed? I may be raising more questions than answers, but I'm confident our collective experience will come up with an answer.

Paul

PS What part of Cal are you headed for?
I did not remove the distributor.

I'll have the tool when I get back, it's $18 at summit, no big deal.

I'll be in Pleasanton, outside of San Fran.
Reply
Old Apr 7, 2008 | 01:30 PM
  #203  
Paul Ruggeri's Avatar
0Paul Ruggeri
Former Vendor
 
Joined: Nov 2006
Posts: 2,482
Likes: 3
From: Carmichael ca
Default

If you're still here on the 12th, and not doing anything, we've got a big cruise going on and you're welcome to join us. Check out the Norcal section for details. You gotta promise not to shoot anybody though, I know how you wiseguys from Jersey are.

Paul
Reply
Old Apr 7, 2008 | 02:03 PM
  #204  
CFI-EFI's Avatar
CFI-EFI
Race Director
10 Year Member
 
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Default

Originally Posted by jsup
Quote:
Try priming the oil pump, disconnect the oil sending unit and see if oil is coming out of there

Why disconnect the oil pressure sending unit? The oil pressure gauge is telling you that you have pressure to the sender.

RACE ON!!!
Reply
Old Apr 7, 2008 | 02:12 PM
  #205  
85blkrose's Avatar
85blkrose
Racer
 
Joined: Sep 2004
Posts: 495
Likes: 0
From: berwick pennsylvania
Default

no i am confused. how it it possible for the oil galley that supplys the lifter valley be blocked up. all he did is pull the intake right? and if it is blocked where the hell is it so i know so i dont do it myself.

Last edited by 85blkrose; Apr 7, 2008 at 02:13 PM. Reason: typo
Reply
Old Apr 7, 2008 | 08:01 PM
  #206  
CFI-EFI's Avatar
CFI-EFI
Race Director
10 Year Member
 
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Default

Originally Posted by 85blkrose
no i am confused. how it it possible for the oil galley that supplys the lifter valley be blocked up. all he did is pull the intake right? and if it is blocked where the hell is it so i know so i dont do it myself.
I don't think it is YOU that is confused. Over 200 posts to get the engine running properly after an injector change and he is actually advising someone else to ohm the injectors to a guy with too fast of an idle.

RACE ON!!!
Reply
Old Apr 7, 2008 | 08:13 PM
  #207  
65Z01's Avatar
65Z01
Team Owner
20 Year Member
 
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Default

all he did is pull the intake right?
My understanding is that he:
-pulled the SR, runners & fuel rail (base was not touched)
-installed new injectors and replaced the intake parts
-changed the oil & filter

Also, that there was no "noise" before the above R&R items were preformed.
Reply
Old Apr 7, 2008 | 09:40 PM
  #208  
jsup's Avatar
jsup
Thread Starter
Team Owner
 
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Default

Originally Posted by Paul Ruggeri
If you're still here on the 12th, and not doing anything, we've got a big cruise going on and you're welcome to join us. Check out the Norcal section for details. You gotta promise not to shoot anybody though, I know how you wiseguys from Jersey are.

Paul
I'm in Pleasanton now. I'm leaving on the red eye on Wednesday, 10:45 flight. I get home at 6:30AM. At which time I will run directly to the garage and start working on the car till daylight Friday, to make CFI happy. It's taking me too long.

I am open on Wed if you want to get a beer before I go. I have to be at SFO by say 9:30....
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

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

 Joe Kucinski
story-1

Every 2027 Corvette Engine Explained

 Joe Kucinski
story-2

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

 Verdad Gallardo
story-3

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-4

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-5

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-6

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-7

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

 Joe Kucinski
story-8

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-9

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

 Michael S. Palmer
Old Apr 7, 2008 | 09:41 PM
  #209  
jsup's Avatar
jsup
Thread Starter
Team Owner
 
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Default

Originally Posted by 65Z01
My understanding is that he:
-pulled the SR, runners & fuel rail (base was not touched)
-installed new injectors and replaced the intake parts
-changed the oil & filter

Also, that there was no "noise" before the above R&R items were preformed.
I did not remove the runners.
Reply
Old Apr 7, 2008 | 09:48 PM
  #210  
jsup's Avatar
jsup
Thread Starter
Team Owner
 
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Default

Before I go any further, I am going to run oil with the primer. I want to see oil.

When I see oil, I will try to restart it.

If it makes noise, then I'm into taking out all the plugs, getting a stethoscope, looking at the flex plate, etc....however, none of that matters if there's no oil flowing.

Comments?
Reply
Old Apr 7, 2008 | 09:52 PM
  #211  
Corvette Chris's Avatar
Corvette Chris
Le Mans Master
15 Year Member
 
Joined: Mar 2006
Posts: 5,262
Likes: 0
From: E. Amherst NY
Default

Originally Posted by jsup
Before I go any further, I am going to run oil with the primer. I want to see oil.

When I see oil, I will try to restart it.

If it makes noise, then I'm into taking out all the plugs, getting a stethoscope, looking at the flex plate, etc....however, none of that matters if there's no oil flowing.

Comments?
Sounds pretty good to me. IF oil does flow to the heads like its supposed to, using the priming tool, you have to make sure it keeps the flow while running. I can't see why it wouldn't, if the other works, but you never know...
Reply
Old Apr 8, 2008 | 11:18 AM
  #212  
Paul Ruggeri's Avatar
0Paul Ruggeri
Former Vendor
 
Joined: Nov 2006
Posts: 2,482
Likes: 3
From: Carmichael ca
Default

I live near Sacramento, so the cold one will have to wait for another day. I think your plan is a good one, but I think I'd get some sleep before worrying about keeping CFI happy. I can't think of what could keep oil from the top end when you have good pressure at the sensor. In the end its just a small block Chevy, it can't be that complicated.


Paul
Reply
Old Apr 8, 2008 | 01:25 PM
  #213  
85blkrose's Avatar
85blkrose
Racer
 
Joined: Sep 2004
Posts: 495
Likes: 0
From: berwick pennsylvania
Default

ok. lets start here again you pulled off your sr plenum, left your runners on, you pulled your fuel rail and injectors, swapped out your injectors with larger ones, put it all back together and installed new programmed chip. am i correct so far? hope so. the car ran fine before this swap took place.

here is my questions.
was your car jacked up or on jackstands and if so where did you jack it from?

hopefully you didnt do it from the cross member and squash your oil pan into the rods.casuse your noise starts as soon as you motor rotates

that is the only possible thing i could think of that you could have done by swapping out your injectors. that would give you a metel to metal contact. pull your plugs and rotate the motor by hand with the crank bolt and feel/listen for any kinda interfence.
Reply
Old Apr 8, 2008 | 01:44 PM
  #214  
jsup's Avatar
jsup
Thread Starter
Team Owner
 
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Default

[QUOTE=85blkrose;1564921305]ok. lets start here again you pulled off your sr plenum, left your runners on, you pulled your fuel rail and injectors, swapped out your injectors with larger ones, put it all back together and installed new programmed chip. am i correct so far? hope so. the car ran fine before this swap took place.[\quote]

Correct
here is my questions.
was your car jacked up or on jackstands and if so where did you jack it from?
Not on jack stands, however, I did jack up the driver's side to change the oil. I put my floor jack on the frame member behind the front tire
hopefully you didnt do it from the cross member and squash your oil pan into the rods.casuse your noise starts as soon as you motor rotates
Nope, frame behind the tire

that is the only possible thing i could think of that you could have done by swapping out your injectors. that would give you a metel to metal contact. pull your plugs and rotate the motor by hand with the crank bolt and feel/listen for any kinda interfence.
That's what I'm going to do when I get home after I run the oil to see if it comes up. I have to see what the oil is doing before I touch anything else.
Reply
Old Apr 10, 2008 | 11:49 AM
  #215  
jsup's Avatar
jsup
Thread Starter
Team Owner
 
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Default

SO, I just got a couple of hours ago. Did the red eye from SFO to Newark. I had an emergency seat row that didn't incline, and I believe the seat actually pitched forward.

Needless to say I did not get a lot of sleep, if any.

As I passed out at home the doorbell rings and there's a FedEx box on my step. The oil tool.

I went into the garage, found my best Portor Cable 1/2 inch drive masonary drill. Set it to high speed and took it off hammer.

I connected it to the oil priming tool and ran it.

Oil started coming up slowly on some rockers, but not all of them.

Also, kind of odd, there seemed to be a lot of resistance, which lessoned over time as the drill ran. At one point it appeared the resistance disappeared all at once and the pump spun free.

As I started this thread, I am exhausted, I did this as a quick test, probably letting the drill run on high speed for two-three minutes.

Comments.
Reply
Old Apr 10, 2008 | 11:55 AM
  #216  
Pete K's Avatar
Pete K
Race Director
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Feb 2004
Posts: 12,518
Likes: 19
Default

The spinning was likely the result of pulling the priming tool up and out of the pump.
You may have popped a galley plug.
Reply
Old Apr 10, 2008 | 12:06 PM
  #217  
jsup's Avatar
jsup
Thread Starter
Team Owner
 
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Default

Originally Posted by Pete K
The spinning was likely the result of pulling the priming tool up and out of the pump.
You may have popped a galley plug.
The drill didn't move up and down. I was very careful to hold it in place.

I'll have to look up the galley plug. It's by the rear main seal if I remember correctly?

Think there was too much oil pressure?
Reply

Get notified of new replies

To OK Guys, need some serious help!!

Old Apr 10, 2008 | 12:09 PM
  #218  
Paul Ruggeri's Avatar
0Paul Ruggeri
Former Vendor
 
Joined: Nov 2006
Posts: 2,482
Likes: 3
From: Carmichael ca
Default

I agree with Pete K, it sounds like you have an internal oil leak that's bleeding off the oil pressure before it gets to the lifter galley. There isn't any oil leaking out of the back of the engine on to the ground is there?

Paul
Reply
Old Apr 10, 2008 | 12:12 PM
  #219  
jsup's Avatar
jsup
Thread Starter
Team Owner
 
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Default

Originally Posted by Paul Ruggeri
I agree with Pete K, it sounds like you have an internal oil leak that's bleeding off the oil pressure before it gets to the lifter galley. There isn't any oil leaking out of the back of the engine on to the ground is there?

Paul
Not that I can see, but I will knock off the cover and look.

Is it possible the 20-50 caused the problem because of too much pressure?

This sounds reasonable.....where to start? Rear main seal (which I didn't change) and valley plugs?

Stupid question...I never changed a valley plug, can it be done with the motor in the car? I'm assuming so.
Reply
Old Apr 10, 2008 | 12:14 PM
  #220  
jsup's Avatar
jsup
Thread Starter
Team Owner
 
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Default

How does this sound?
I had the same problem with a 383 stroker i built. tooling down the road it was fine but as soon as i jumped on the gas at 3000 rpm the oil pressure fell off if i let off the gas the pressure would come back up. so after pullin the engine out the second time we tested everything and finnaly came accross the one thing people tend to over look in an engines oilling system. the lifters. the lifters are a check valve times 16 in your engine so even if 3 or 4 are not working properly then this is a hole in the oil system and at rpm can and will create pressure drop fast
.

The difference is that I'm not getting to 3000 RPMs, I'm having the problem at idle.
Reply



All times are GMT -4. The time now is 08:51 PM.

story-0
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-1
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

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


VIEW MORE
story-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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