C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

oil on bolt by filter

Thread Tools
 
Search this Thread
 
Old Aug 14, 2019 | 01:15 PM
  #1  
ace6th's Avatar
ace6th
Thread Starter
Heel & Toe
 
Joined: Mar 2019
Posts: 24
Likes: 0
Default oil on bolt by filter

I have a oil leak the bolt to the right above the oil filter was the highest point on the engine that i can find oil.
any suggestions on where my leak could be coming from?
could it be from the object right above the filter that has the 2 bolts?
any input would help, thanks in advance.



highest point of leak
Reply
Old Aug 14, 2019 | 01:22 PM
  #2  
Pounder's Avatar
Pounder
1/4 mile/AutoX
Supporting Lifetime
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2014
Posts: 11,441
Likes: 2,186
From: Buffalo Texas
Default

re-torque oil pan bolts ???
Reply
Old Aug 14, 2019 | 01:27 PM
  #3  
C5 Diag's Avatar
C5 Diag
Moderator, Tech Contributor
Supporting Lifetime Gold
10 Year Member
Veteran: Air Force
Liked
Community Favorite
 
Joined: Sep 2013
Posts: 15,565
Likes: 4,034
From: Cape Coral, Florida
Default

If that is all it is I wouldn't about it unless it may be dripping...DON'T freak out !!...spray some Brake Kleen around that area and wipe it down...see what comes back !!...in the Airline Industry our jet engines have more leaks than yours...LOL !!!
Reply
Old Aug 14, 2019 | 01:32 PM
  #4  
ace6th's Avatar
ace6th
Thread Starter
Heel & Toe
 
Joined: Mar 2019
Posts: 24
Likes: 0
Default

i have re-torqued them........this is why I'm stumped......can the oil temp sensor right above the filter leak oil?
thanks!

Last edited by ace6th; Aug 14, 2019 at 01:32 PM.
Reply
Old Aug 14, 2019 | 01:34 PM
  #5  
ace6th's Avatar
ace6th
Thread Starter
Heel & Toe
 
Joined: Mar 2019
Posts: 24
Likes: 0
Default

it is dripping, i have a pretty good leak
Reply
Old Aug 14, 2019 | 02:02 PM
  #6  
Bill Curlee's Avatar
Bill Curlee
Tech Contributor
Supporting Lifetime Gold
Veteran: Navy
25 Year Member
Liked
Community Favorite
 
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Default

WARNING! If you retorque the oil pan bolts to the factory spec, there is a very high possibility that you will STRIP OUT the bolts that screw into the block that go through the front and rear cover assembly. The problem is, the threads are oil contaminated and that causes the felt torque to be less than is actually being applied to the bolts.

Decrease the torque value to a value for oil lubricated threads for the size threads that are used for those fasteners. There are only four that really strip easily.

I agree,, Wipe down the entire area and run the engine and monitor for any oil that runs down from the back of the block. Most likely a leak from the Oil Pressure Sensor on the top of the engine block drivers side behind the intake manifold. You can see it with a mirror and a flashlight. Very common issue. Unless you have a puddle of oil under that car after sitting, just drive it like you stole it!
Reply
Old Aug 14, 2019 | 06:52 PM
  #7  
93Polo's Avatar
93Polo
Team Owner
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 1999
Posts: 31,976
Likes: 487
From: Guinness Its whats for B'fast JAWGA
CI 3-4-5-9 Veteran
Default

the housing/adapter for the oil temp sensor is a common leak spot.

You may also want to drop the inspection cover for the bellhousing to see if it has oil, if the leak continues after replacing the gasket.
Reply
Old Aug 15, 2019 | 08:25 AM
  #8  
ace6th's Avatar
ace6th
Thread Starter
Heel & Toe
 
Joined: Mar 2019
Posts: 24
Likes: 0
Default

what would you recommend to torque the pan gasket cover bolts to?
how many bolts in the bottom pan gasket? i can only see 5
thanks in advance

Last edited by ace6th; Aug 15, 2019 at 08:25 AM.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-1

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

 Joe Kucinski
story-2

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-3

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

 Michael S. Palmer
story-4

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-5

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-6

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-7

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

 Joe Kucinski
story-8

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

 Verdad Gallardo
story-9

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
Old Aug 15, 2019 | 09:40 AM
  #9  
93Polo's Avatar
93Polo
Team Owner
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 1999
Posts: 31,976
Likes: 487
From: Guinness Its whats for B'fast JAWGA
CI 3-4-5-9 Veteran
Default

https://www.corvetteforum.com/forums...-sequence.html

Reply
Old Aug 15, 2019 | 09:47 AM
  #10  
93Polo's Avatar
93Polo
Team Owner
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 1999
Posts: 31,976
Likes: 487
From: Guinness Its whats for B'fast JAWGA
CI 3-4-5-9 Veteran
Default

https://www.corvetteforum.com/forums...que-specs.html
Reply
Old Aug 15, 2019 | 09:55 AM
  #11  
Bill Curlee's Avatar
Bill Curlee
Tech Contributor
Supporting Lifetime Gold
Veteran: Navy
25 Year Member
Liked
Community Favorite
 
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Default

Some C5s have a ONE PIECE Oil Pan. (early C5s) and some have a TWO PIECE pan Late C5s. I don't know the exact date of the crossover. I know 2000-2004 have the two piece pans.

The part in the picture above is the upper oil pan section. The part that is resting on the ground would have the removable lower pan if it had that option.

NOTE, If you have a TWO PIECE PAN, removing the lower oil pan will NOT let you see any of the engines crank or internals to the engine. Just the pick up tube and some oil baffles.

https://www.google.com/search?q=C5+t...N5gsB1ryl3SWM:

https://www.google.com/search?q=C5+t...F_h6QOPq85E9M:


In this picture, you can see the long shanks of the TWO rear bolts that screw into the back of the block that strip easily!!!
Reply
Old Aug 15, 2019 | 11:07 AM
  #12  
ace6th's Avatar
ace6th
Thread Starter
Heel & Toe
 
Joined: Mar 2019
Posts: 24
Likes: 0
Default

thanks! can you tell me what the bolt, circled in yellow is?
can oil leak from here?
mine is missing on my 1999 c5.​​​​​​​
Reply
Old Aug 15, 2019 | 04:45 PM
  #13  
93Polo's Avatar
93Polo
Team Owner
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 1999
Posts: 31,976
Likes: 487
From: Guinness Its whats for B'fast JAWGA
CI 3-4-5-9 Veteran
Default

That is the lateral main cap bolt. If it is there a leak is unlikely and it should be there. A member did have leak when the bolt was missing.

https://www.corvetteforum.com/forums...ming-from.html
Reply
Old Aug 15, 2019 | 04:48 PM
  #14  
Bill Curlee's Avatar
Bill Curlee
Tech Contributor
Supporting Lifetime Gold
Veteran: Navy
25 Year Member
Liked
Community Favorite
 
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Default

Looks like you are missing more than one!
Reply
Old Aug 15, 2019 | 04:52 PM
  #15  
93Polo's Avatar
93Polo
Team Owner
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 1999
Posts: 31,976
Likes: 487
From: Guinness Its whats for B'fast JAWGA
CI 3-4-5-9 Veteran
Default

Bill, it is the same picture that Armand Gagnon posted a year ago. So I don't believe that is his motor.
Reply
Old Aug 15, 2019 | 04:57 PM
  #16  
93Polo's Avatar
93Polo
Team Owner
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 1999
Posts: 31,976
Likes: 487
From: Guinness Its whats for B'fast JAWGA
CI 3-4-5-9 Veteran
Default

You should see a bolt head something like this. The pic does have a relocated oil pressure or temp sensor for a swap, best I could find on a quick search.

Reply
Old Jun 1, 2024 | 08:26 PM
  #17  
VetteCop29's Avatar
VetteCop29
Racer
15 Year Member
 
Joined: Aug 2008
Posts: 449
Likes: 1
From: Tampa Bay, Florida
Default Very similar problem

My 2005 has the same oil smell with open air A/C intake open , the engine and manifold is spotless under the hood, but under the engine, garage mat catches quite a bit , center to rear of engine.
203,400 miles, runs great, I’ve had it since ‘09….
Pretty regular mechanic says around $800.,,does that sound right?









you can see the manifold is spotless….
Reply

Get notified of new replies

To oil on bolt by filter





All times are GMT -4. The time now is 06:54 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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
story-7
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-8
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-9
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