C4 General Discussion General C4 Corvette Discussion not covered in Tech

removing the head issues

Thread Tools
 
Search this Thread
 
Old Jun 21, 2015 | 12:34 PM
  #1  
canuck buick's Avatar
canuck buick
Thread Starter
Pro
 
Joined: May 2012
Posts: 520
Likes: 9
Default removing the head issues

i have removed the exhaust bolts and 9 head bolts but the head still won't budge is there bolts i am missing?
Reply
Old Jun 21, 2015 | 01:05 PM
  #2  
corvetteronw's Avatar
corvetteronw
Race Director
Supporting Lifetime
20 Year Member
Veteran: Army
St. Jude 10 Year Donor
Liked
 
Joined: Feb 2003
Posts: 16,475
Likes: 270
From: Kingman AZ
Cruise-In VII Veteran
Cruise-In VIII
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
Default

I remember having the same problem on a C3 engine. I used a piece of 2x4 up against the head and hit the other end of the wood with a small sledge hammer. After being on the engine for some 20+ years sometimes they need a little persuasion.
Reply
Old Jun 21, 2015 | 01:25 PM
  #3  
PLRX's Avatar
PLRX
Team Owner
 
Joined: Aug 2005
Posts: 34,988
Likes: 515
From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
2018 Corvette of Year Finalist
2017 C4 of Year
2016 C7 of Year Finalist
St. Jude Donor '09 thru '20
Default



Yep, I bet you have an issue. The heads have 17 bolts, the 6 exhaust bolts remove the exhaust manifold.


Reply
Old Jun 21, 2015 | 02:02 PM
  #4  
canuck buick's Avatar
canuck buick
Thread Starter
Pro
 
Joined: May 2012
Posts: 520
Likes: 9
Default

thx just found those 8 other bolts ..aagh now i have to get under the car and try and unbolt the exhaust....fric will this ever end
Reply
Old Jun 22, 2015 | 04:19 PM
  #5  
cuengineer's Avatar
cuengineer
Pro
 
Joined: Jan 2011
Posts: 580
Likes: 8
From: Clemson SC
Default

Even with ALL of the bolts out, you will likely still need to use the 2x4 and tap it with a large hammer to break it loose. At least that is what found when replacing the head gaskets. I kept looking for the other bolt(s) because it just did not seem to move. Finally, tapped it using the wood block at each end, and it immediately showed a slight crack and was easy to lift off. Well, easy considering they are still big and heavier than you might think. Good luck!
Reply
Old Jun 22, 2015 | 05:16 PM
  #6  
desertmike1's Avatar
desertmike1
Melting Slicks
10 Year Member
 
Joined: Aug 2008
Posts: 2,082
Likes: 50
From: Palmdale CA
Default

Originally Posted by canuck buick
thx just found those 8 other bolts ..aagh now i have to get under the car and try and unbolt the exhaust....fric will this ever end
Patience is your best friend..
Reply
Old Jun 23, 2015 | 08:02 PM
  #7  
canuck buick's Avatar
canuck buick
Thread Starter
Pro
 
Joined: May 2012
Posts: 520
Likes: 9
Default

so I got the head off and each cylinder had variuos amounts of coolant in them i am guessing it leaked in from the head as the car ran fine before i started this. i pulled this apart because i was leaking fluid from the back and my mechanic told me he saw the coolant leaking from somewhere around the head gasket, problem is the gasket looks intact and the head doesn't look like it has any cracks don,t know what to do now did i go through this for nothing
Reply
Old Jun 23, 2015 | 08:13 PM
  #8  
John A. Marker's Avatar
John A. Marker
Le Mans Master
15 Year Member
 
Joined: Mar 2004
Posts: 5,107
Likes: 171
From: Dublin CA
Default

Coolant in the oil?

Did you see where the coolant was leaking around the head as indicated by your mechanic? Where was it?

What did the intake gasket look like?

Was there coolant loss in the system?

If there was no indication of coolant loss in the coolant system....how well do you trust your mechanic? Any chance he was looking for work and was looking to you for his next paycheck?

IF you didn't pull the knock sensor and the plug in the driver's side of the block, the coolant level in the block was higher than the heads. So when you pulled the heads, the coolant ran into the cylinders.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-1

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-2

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-3

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-4

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-5

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-6

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
story-7

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
story-8

5 MOST and 5 LEAST Popular Corvette Model Years in History!

 Joe Kucinski
story-9

2027 Corvette Buyer's Guide: Everything You Need to Know!

 Joe Kucinski
Old Jun 23, 2015 | 09:08 PM
  #9  
canuck buick's Avatar
canuck buick
Thread Starter
Pro
 
Joined: May 2012
Posts: 520
Likes: 9
Default

Originally Posted by John A. Marker
Coolant in the oil?

Did you see where the coolant was leaking around the head as indicated by your mechanic? Where was it?

What did the intake gasket look like?

Was there coolant loss in the system?

If there was no indication of coolant loss in the coolant system....how well do you trust your mechanic? Any chance he was looking for work and was looking to you for his next paycheck?

IF you didn't pull the knock sensor and the plug in the driver's side of the block, the coolant level in the block was higher than the heads. So when you pulled the heads, the coolant ran into the cylinders.

no water in the oil

coolant was leaking from the back of the engine car ran fine but coolant was dripping out pretty good.

gaskets all looked ok

didn't pull the plug

i am going to get the head checked for trueness and put it back together, don't know what else to do at this point
Reply
Old Jun 23, 2015 | 09:53 PM
  #10  
HAD2HAV2's Avatar
HAD2HAV2
Melting Slicks
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2001
Posts: 2,996
Likes: 304
From: MOORESVILLE NC
Default

For a little extra $$$, I had the heads ported along with the plenum and runner tubes. This is a huge job you are doing, glad its over on my end.
Reply
Old Jun 23, 2015 | 09:59 PM
  #11  
canuck buick's Avatar
canuck buick
Thread Starter
Pro
 
Joined: May 2012
Posts: 520
Likes: 9
Default

how much approx am i looking at for porting and does it give me much more power?
Reply
Old Jun 24, 2015 | 08:52 AM
  #12  
HAD2HAV2's Avatar
HAD2HAV2
Melting Slicks
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2001
Posts: 2,996
Likes: 304
From: MOORESVILLE NC
Default

I'm sorry, I didn't mean the Plenum I meant the intake. I just degreased the Plenum. The 100 degree heat is getting to me. If you are taking your heads to shop they will know a cost. It was 3 years ago for me and I am thinking it was around $300 for all 3. As far as power, I didn't measure it before or after. You can Google engine porting and find out. To me, my 88 with 133,000 miles gets up and goes much better than before. I ended up having to replace the fuel pump a year later. It became lazy due to age and a new pump seemed to help my power also. Good luck with engine work.
If you are working on a L-98, a can of the L-98 valve cover spray paint works wonders on the runners and plenum, 2 coats.
Reply
Old Jun 24, 2015 | 09:56 AM
  #13  
John A. Marker's Avatar
John A. Marker
Le Mans Master
15 Year Member
 
Joined: Mar 2004
Posts: 5,107
Likes: 171
From: Dublin CA
Default

You never mentioned if the car over heated, so I will assume that it did not. So the chances are that the heads are flat. But if you actually saw coolant leaking from between the head and block it has to be the gasket or the head is warped.

If you look at your old gaskets, you will see that the coolant passages are all close to the cylinder walls. There is a lot of gasket material between the passages and the outside edge of the gaskets. I think you would have seen some sign of coolant moving or forced past the gasket and running out between the head and block.

The coolant was leaking between the head and block...correct? No chance it was leaking between the intake and the head and running down the back of the head?
Reply
Old Jun 24, 2015 | 07:45 PM
  #14  
HAD2HAV2's Avatar
HAD2HAV2
Melting Slicks
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2001
Posts: 2,996
Likes: 304
From: MOORESVILLE NC
Default

canuck buick. Found my old head rebuild sheet (March 2012).
3 angle valve job = $175
porting = $150
bronze guides = $110
surface heads = $80
Reply

Get notified of new replies

To removing the head issues





All times are GMT -4. The time now is 04:53 AM.

story-0
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-1
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-2
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-3
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-4
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-5
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-6
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-7
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-8
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE
story-9
2027 Corvette Buyer's Guide: Everything You Need to Know!

Slideshow: 2027 Corvette buyer's guide

By Joe Kucinski | 2026-04-17 16:41:08


VIEW MORE