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

Ground down lifters help!!

Thread Tools
 
Search this Thread
 
Old Mar 17, 2019 | 03:59 PM
  #1  
82ndABN-C3's Avatar
82ndABN-C3
Thread Starter
Heel & Toe
 
Joined: Jul 2018
Posts: 21
Likes: 3
From: Fayetteville, NC
Default Ground down lifters help!!

Hello to everyone and thanks for reading. I’ve been having issues with my 72 and lifters . Been having a constant chatter and with losing power. Took the valve covers off and intake manifold to discover this. Looks like the lifter was ground down . Just curious if I could be a cam issue and should I at least pull the heads to check them as well. Any advice or guidance would be great appreciated.
Reply
Old Mar 17, 2019 | 04:09 PM
  #2  
Big2Bird's Avatar
Big2Bird
Le Mans Master
15 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Dec 2006
Posts: 8,837
Likes: 1,028
Default

Originally Posted by 82ndABN-C3
Hello to everyone and thanks for reading. I’ve been having issues with my 72 and lifters . Been having a constant chatter and with losing power. Took the valve covers off and intake manifold to discover this. Looks like the lifter was ground down . Just curious if I could be a cam issue and should I at least pull the heads to check them as well. Any advice or guidance would be great appreciated.

Well, your cam is toast, and all that metal is in the bottom of the pan. AT THE VERY LEAST, you have to change the cam and lifters. If it's high millage, I would pull the whole thing.
Reply
Old Mar 17, 2019 | 04:14 PM
  #3  
BLUE1972's Avatar
BLUE1972
Race Director
15 Year Member
Liked
Loved
Top Answer: 5
 
Joined: Oct 2008
Posts: 19,220
Likes: 1,671
From: Long Island
Default

what engine. what are you using for oil.

stock or modified.. Oil pressure and mileage.
Reply
Old Mar 17, 2019 | 04:26 PM
  #4  
joewill's Avatar
joewill
Safety Car
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2007
Posts: 4,458
Likes: 331
From: Indy Indiana
Default

yup, its cam kit time.
you will be amazed at the new power your car will have.
install with the proper install lube and break in oil. and use zinc oil.....
Reply
Old Mar 17, 2019 | 04:36 PM
  #5  
HeadsU.P.'s Avatar
HeadsU.P.
Le Mans Master
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
Default

Another one bites the dust. Another misfortune from lack of knowledge about Zinc. And yet there are some individuals that still deny this happens from store bought shelf oils.

Sorry for your loss. Couldn't have happened in the fall with lots of time to rebuild.
Reply
Old Mar 17, 2019 | 04:41 PM
  #6  
3X2's Avatar
3X2
Melting Slicks
25 Year Member
Photogenic
Photoriffic
Top Answer: 1
 
Joined: Jan 2000
Posts: 3,326
Likes: 523
From: home
Default

I'd pull the engine. Not worth the chance of metal in the bearings, oil pump, oil passages, etc. I use Mobil 1 10w-30 with a bottle of ZDDP Plus. Also follow proper cam break in procedures.
Reply
Old Mar 17, 2019 | 05:01 PM
  #7  
82ndABN-C3's Avatar
82ndABN-C3
Thread Starter
Heel & Toe
 
Joined: Jul 2018
Posts: 21
Likes: 3
From: Fayetteville, NC
Default


Originally Posted by BLUE1972
what engine. what are you using for oil.

stock or modified.. Oil pressure and mileage.
Its 454 car not sure on what all had be done to it before I got it. I’ve only had it about 8 months. All I do know is that it has Comp Cams rocker arms with 1.72 ratio . As far as anything else I’m still diving into the motor . Sucks that this happened just before summer

Last edited by 82ndABN-C3; Mar 17, 2019 at 05:03 PM. Reason: Add
Reply
Old Mar 17, 2019 | 05:47 PM
  #8  
HeadsU.P.'s Avatar
HeadsU.P.
Le Mans Master
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
Default

Originally Posted by 3X2
I'd pull the engine. Not worth the chance of metal in the bearings, oil pump, oil passages, etc. I use Mobil 1 10w-30 with a bottle of ZDDP Plus. Also follow proper cam break in procedures.
Its already in the bearings, oil pump, etc. It took months for this to happen if not over a year. That's a lot of metal missing assuming all 16 lifters look like that, and likely ran like crap for a year also.

Last edited by HeadsU.P.; Mar 17, 2019 at 05:49 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 Mar 17, 2019 | 06:47 PM
  #9  
jackson's Avatar
jackson
Le Mans Master
 
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Default

Originally Posted by 82ndABN-C3
Hello to everyone and thanks for reading. I’ve been having issues with my 72 and lifters . Been having a constant chatter and with losing power. Took the valve covers off and intake manifold to discover this. Looks like the lifter was ground down . Just curious if I could be a cam issue and should I at least pull the heads to check them as well. Any advice or guidance would be great appreciated.
Originally Posted by Big2Bird
Well, your cam is toast, and all that metal is in the bottom of the pan. AT THE VERY LEAST, you have to change the cam and lifters. If it's high millage, I would pull the whole thing.
Originally Posted by 82ndABN-C3


Its 454 car not sure on what all had be done to it before I got it. I’ve only had it about 8 months. All I do know is that it has Comp Cams rocker arms with 1.72 ratio . As far as anything else I’m still diving into the motor . Sucks that this happened just before summer
agree what Big2Bird says ... 1.72 essentially stock ratio. Sure it sucks ... but better now than if it puked on vacation cruising at Kitty Hawk.

If the car's a keeper ... and it's budgeted for ... now's the time for a Roller cam-lifter retrofit.

-edit- OP, I don't know anyone at Fayetteville to help. But I do know someone just south at Dillon-Latta who might can. Also, great auto machine shop at Conway SC ... Dennis Jordan Performance.

Last edited by jackson; Mar 17, 2019 at 07:02 PM.
Reply
Old Mar 17, 2019 | 06:57 PM
  #10  
82ndABN-C3's Avatar
82ndABN-C3
Thread Starter
Heel & Toe
 
Joined: Jul 2018
Posts: 21
Likes: 3
From: Fayetteville, NC
Default

Originally Posted by HeadsU.P.
Its already in the bearings, oil pump, etc. It took months for this to happen if not over a year. That's a lot of metal missing assuming all 16 lifters look like that, and likely ran like crap for a year also.
Nope that is the only one that looks like that which I surprised to find .
Reply
Old Mar 17, 2019 | 07:23 PM
  #11  
BLUE1972's Avatar
BLUE1972
Race Director
15 Year Member
Liked
Loved
Top Answer: 5
 
Joined: Oct 2008
Posts: 19,220
Likes: 1,671
From: Long Island
Default

Time for a rebuild. I would pull the motor and rebuild it. Looks like an oil issue on the rocker - maybe from the lifter Failing.
Reply
Old Mar 17, 2019 | 07:41 PM
  #12  
7t9l82's Avatar
7t9l82
Le Mans Master
15 Year Member
Conversation Starter
Photogenic
Community Favorite
 
Joined: Oct 2010
Posts: 6,937
Likes: 848
From: melbourne florida
2023 C3 of the Year Finalist - Modified
Default

Make sure all the galley passages are opened and cleaned. It's really more work cleaning the block than anything else.riffle brushes are your friend.
Reply
Old Mar 17, 2019 | 07:43 PM
  #13  
HeadsU.P.'s Avatar
HeadsU.P.
Le Mans Master
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
Default

Ok, one lifter. Could be a reject from a poor source of auto parts. Could be oil galley that feeds that lifter is plugged.

Before you pull the engine, consider pulling the oil pan, front cover, timing chain set, cam. Remove one or two connecting rod caps and check the bearing surface.
If its bad, you know what you have to do next.

However, if its unscathed, you could pour / flush a couple of Qts of cheap oil over the valvespring area, all through the lifter valley, with the oil pan reattached with a few bolts. Then remove the pan again and clean really well. That should remove 90% of any metal. Figure in a new oil-pump & screen pickup for certain. Add a oil pan magnet on the outside.

But its up to you. Only you know your budget and how far you want to go with this. Your bearings will determine your fate. Hopefully the old oil filter has been catching the metal all along.

Last edited by HeadsU.P.; Mar 17, 2019 at 08:11 PM.
Reply
Old Mar 17, 2019 | 08:26 PM
  #14  
Vette5311's Avatar
Vette5311
Race Director
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Mar 2018
Posts: 10,713
Likes: 2,168
From: Golden Colorado
Default

For what it's worth. The damage is done but if it is only one lifter I would roll the dice. I've had this happen 3 times on 3 different engines before I figured it out. Google ZDDP + flat cam. Crack open a cold one and do lots of reading. Now back to what I was saying. Compression check the engine. If good get a new flat tappet cam and kit to match old cam lift so your springs and piston to valve clearance will be ok. (I don't deny roller is better but bear with me). Clean pan and timing cover and wipe down everything you can to clean out metal. Get a new oil bypass filter adapter. Change cam and timing set. Can be done with engine in car. Get a good cam core not an offshore one. Put together with lots of break in lube break-in oil with high zinc oil. If engine has dual springs remove inner valve spring for breakin. Break in new cam at 2500 rpm for 25 minutes. Do not shut off or idle during breakin. Immediately change oil again. More high zinc oil. It may buy you a year or more with current engine and get you to next year or allow for an engine build while driving the car this season. You really don't have much to lose except cost of cam and kit if you can do the work yourself and you may get lucky. Just my 2 cents worth. Good Luck
Reply
Old Mar 17, 2019 | 08:26 PM
  #15  
TimAT's Avatar
TimAT
Le Mans Master
15 Year Member
Liked
Loved
 
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
Default

As long as that's been eating that one lifter, I'd suspect it's not the ONLY one, and there is going to be metal everywhere. I'd bet the filter didn't catch all of it. I did my 69 BB a year ago- but I went the long way around, Found a good used 4 bolt block and built a 496 with all forged lower end and a big stack of new parts. Not to mention a big pile of toad pelts that went away getting said parts.
Reply
Old Mar 17, 2019 | 08:48 PM
  #16  
7t9l82's Avatar
7t9l82
Le Mans Master
15 Year Member
Conversation Starter
Photogenic
Community Favorite
 
Joined: Oct 2010
Posts: 6,937
Likes: 848
From: melbourne florida
2023 C3 of the Year Finalist - Modified
Default

If you are taking a shot at it you could do the stuff previously mentioned then put a few quarts of oil in the pan and run a priming tool to circulate oil through the passages.maybe even put some magnets in the pan and different places to catch some shavings. I've never done that before but it may be worth a try.
Reply
Old Mar 17, 2019 | 08:59 PM
  #17  
Gunfighter13's Avatar
Gunfighter13
Pro
 
Joined: Mar 2014
Posts: 529
Likes: 113
From: Texas
Default

Looks like a good time to go to a Hydraulic Roller Camshaft
Reply

Get notified of new replies

To Ground down lifters help!!

Old Mar 17, 2019 | 09:01 PM
  #18  
Kid Vette's Avatar
Kid Vette
Melting Slicks
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2003
Posts: 2,802
Likes: 241
From: Niles, MI
Default

Originally Posted by Vette5311
For what it's worth. The damage is done but if it is only one lifter I would roll the dice. I've had this happen 3 times on 3 different engines before I figured it out. Google ZDDP + flat cam. Crack open a cold one and do lots of reading. Now back to what I was saying. Compression check the engine. If good get a new flat tappet cam and kit to match old cam lift so your springs and piston to valve clearance will be ok. (I don't deny roller is better but bear with me). Clean pan and timing cover and wipe down everything you can to clean out metal. Get a new oil bypass filter adapter. Change cam and timing set. Can be done with engine in car. Get a good cam core not an offshore one. Put together with lots of break in lube break-in oil with high zinc oil. If engine has dual springs remove inner valve spring for breakin. Break in new cam at 2500 rpm for 25 minutes. Do not shut off or idle during breakin. Immediately change oil again. More high zinc oil. It may buy you a year or more with current engine and get you to next year or allow for an engine build while driving the car this season. You really don't have much to lose except cost of cam and kit if you can do the work yourself and you may get lucky. Just my 2 cents worth. Good Luck
I've pretty much done this with 2 cars now. Engines ran flawlessly for years afterward. You can always rebuild the engine later if needed but you probably won't need to.
Reply
Old Mar 17, 2019 | 09:06 PM
  #19  
derekderek's Avatar
derekderek
Race Director
 
Joined: Jul 2015
Posts: 13,082
Likes: 3,399
From: SW Florida.
Default

priming tool. run priming tool with the bad lifter removed. shine light down lifter hole. see if you have oil flow. but you do. that oil filter is there for a reason. new cam and lifters. can you say roller lifters? oil pump and pick up.
Reply
Old Mar 17, 2019 | 11:15 PM
  #20  
427Hotrod's Avatar
427Hotrod
Race Director
25 Year Member
Liked
Loved
Top Answer: 5
 
Joined: Jan 2000
Posts: 13,018
Likes: 2,262
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
Default

If you don't tear it all the way down to clean out EVERYTHING....like pull cam bearings, flush all passages etc....at least block off the oil pump bypass so all oil goes through the filter.

JIM
Reply



All times are GMT -4. The time now is 03:22 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