C4 Vette Registry - The Best Resource on the Net for C4 Vettes! C4 Vette
Forums -> C4 Engines
Not Logged In! Login or Register!  Users Online: 11 / Help 
Features   CoolC4 Corvette Parts Auctions

Supporting Vendors
Mid America Motorworks
VetteBookStore.com
CorvetteClothing.com
Bair's Corvettes

C4 of the Month
None Current
Enter Yours Today!
Vanity Plates
OH4FOR
hotshotzny
Featured Links

Buy Now
Corvette Masterpieces: Dream Cars You'd Love to Own (Hardcover)
Corvette Masterpieces: Dream Cars You'd Love to Own (Hardcover)


Corvette Fifty Years (Hardcover)
Corvette Fifty Years (Hardcover)


Corvette Magazine - $19.99 for 8 issues
Corvette Magazine
Only $19.99 for 8 issues


Corvette: America's Sports Car Yesterday, Today, Tomorrow (Hardcover)
Corvette: America's Sports Car Yesterday, Today, Tomorrow (Hardcover)



| Hide Signatures and Profile Pics

 New Topic New Topic Post Reply Reply New Poll New Poll Search     Search Page [1]  
12/7/17 11:34pm - Original Message: 'Intake manifold gasket leaking?'
Tony B
Standard Member
- Send Private Message


Massapequa, NY - USA

Vette(s):
1990 Dark Red Mettalic convertible

Joined: 10/29/2017
Posts: 8
Noticed antifreeze laying in a well on the left rear of the intake manifold. Cleaned it up and it returned. Is that indicative of an intake manifold gasket leak or could it be something else.
 Reply Reply  Quote Reply w/Quote
 
Support C4VR!
Suport our advertisers
12/8/17 11:29am - Reply: 'Re: Intake manifold gasket leaking?'
Strats-N-Vettes
Standard Member
Moderator
- Send Private Message


Atchafalaya Basin, LA - USA

Vette(s):
Black 1979 L-82 Black 1996 LT1 Black 1999 Coupe

Joined: 3/20/2009
Posts: 452
Tony B said: Noticed antifreeze laying in a well on the left rear of the intake manifold. Cleaned it up and it returned. Is that indicative of an intake manifold gasket leak or could it be something else.



At the minimum...leaking gasket.
Was the bolts checked for tightness?


____________________________________
 Reply Reply  Quote Reply w/Quote
12/9/17 9:48pm - Reply: 'Re: Intake manifold gasket leaking?'
Tony B
Standard Member
- Send Private Message


Massapequa, NY - USA

Vette(s):
1990 Dark Red Mettalic convertible

Joined: 10/29/2017
Posts: 8
Didn't check the intake manifold bolts for correct torque. Just picked up the vette in October.
 Reply Reply  Quote Reply w/Quote
12/11/17 3:18am - Reply: 'Re: Intake manifold gasket leaking?'
Hot Rod Roy
Standard Member
- Send Private Message


Mission Viejo, CA - USA

Vette(s):
Yellow '84 Coupe

Joined: 3/18/2015
Posts: 55

How does your oil look?   A leaky intake manifold gasket could also allow antifreeze into your oil . . . not good!



____________________________________
 Reply Reply  Quote Reply w/Quote
12/12/17 11:05am - Reply: 'Re: Intake manifold gasket leaking?'
Tony B
Standard Member
- Send Private Message


Massapequa, NY - USA

Vette(s):
1990 Dark Red Mettalic convertible

Joined: 10/29/2017
Posts: 8
No anti freeze in oil. Oil is clean.
 Reply Reply  Quote Reply w/Quote
12/12/17 1:49pm - Reply: 'Re: Intake manifold gasket leaking?'
Strats-N-Vettes
Standard Member
Moderator
- Send Private Message


Atchafalaya Basin, LA - USA

Vette(s):
Black 1979 L-82 Black 1996 LT1 Black 1999 Coupe

Joined: 3/20/2009
Posts: 452
Tony B said: No anti freeze in oil. Oil is clean.



If it was me....I would loosen intake bolts, then tighten and torque in proper sequence.
Wipe any residuals and monitor for another leak.
 
If it leaks again, plan to remove intake to properly diagnose where it's leaking from.
 
Very simple to do.


____________________________________
 Reply Reply  Quote Reply w/Quote
12/17/17 12:09pm - Reply: 'Re: Intake manifold gasket leaking?'
The Car Whisperer
Standard Member
- Send Private Message


Andover, MA - USA

Vette(s):
1986 Coupe

Joined: 3/22/2009
Posts: 49
I have never seen a torque wrench that you can use to access any of the intake manifold bolts on an L98 without removing the entire fuel delivery system.  It's not a simple task to properly torque the manifold on these engines.  FSM  recommends 35 lb. ft. I just tightened my leaking intake manifold by hand using whatever I could get to the bolt head with., using best judgement as to tightness.  It was quite loose. The leak hasn't re-appeared for three years now.  Just go in and try to tighten it by hand.  A 1/4" box wrench with the proper sized torx insert bit can get to most of the bolt heads on the intake without removing anything.  The wrench is short so you can't get in much trouble over tightening.  Use your experience!!!




____________________________________
1986 "Bright Red" COUPE - Aluminum Heads,
Sport Seats, Bose, Ultra-Flo Exhaust,

Automatic, Bilsteins - "Mostly Original" otherwise.

 Reply Reply  Quote Reply w/Quote
12/27/17 8:49pm - Reply: 'Re: Intake manifold gasket leaking?'
djsroknrol
Standard Member
- Send Private Message


Guthrie, OK - USA

Vette(s):
1984 L83/MD8 coupe

Joined: 2/7/2011
Posts: 124
It could be a number of things: A heater hose or radiator hose, heater core leaking (you would see something like this in the passenger well...not fun) and like the other guys are saying, an intake manifold leak...take a good look at everything coolant related. These things run on the hot side, so don't shortcut anything when it comes to cooling......


____________________________________
Remember, there's no place like ~ ;)
 Reply Reply  Quote Reply w/Quote
 New Topic New Topic Post Reply Reply New Poll New Poll Search     Search Page [1]  
 Forums -> C4 Engines
(Moderator: Adams' Apple, Strats-N-Vettes, eddie20890)
 

 
Official C4 Vette Registry Community:
Home | Forums | Email | Who's Online | Clubs | Events | Member Stats

Other Official C4 Vette Registry Areas:
Members | Research | Shop | My Account | About C4VR
 

Corvette is a registered trademark of the General Motors Corporation(GM) & Chevrolet Motor Division. Vette Registries, LLC is responsible for all site content (except for member submitted content or where otherwise noted) and does not claim or imply that Chevrolet or GM is responsible for Official C4 Vette Registry content. Vette Registries, LLC is independent from GM and is not affiliated with, sponsored or supported by GM.  Copyright/trademark/sales mark infringements are not intended, or implied and are in fact used to support GM, Chevrolet and Corvette

Official C4 Vette Registry content is Copyright 2001-2018, Vette Registries, LLC. Content may not be reused without written consent. All Rights Reserved. NS

Corvette (Vette) Model Years on this site: 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 30