C4 Vette Registry - The Best Resource on the Net for C4 Vettes! C4 Vette
Forums -> C4 Cooling and Heating Systems
Not Logged In! Login or Register!  Users Online: 7 / Help 
Features   CoolC4 Corvette Parts Auctions

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

C4 of the Month
None Current
Enter Yours Today!
Vanity Plates
NEVRL8T
LeesVette
Featured Links

Buy Now
Collector's Originality Guide Corvette 1968-1982 (Paperback)
Collector's Originality Guide Corvette 1968-1982 (Paperback)


The Corvette Factories: Building America's Sports Car (Hardcover)
The Corvette Factories: Building America's Sports Car (Hardcover)


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


Motor Trend - $5 for 12 issues.
Motor Trend
Only $5 for 12 issues.



| Hide Signatures and Profile Pics

 New Topic New Topic Post Reply Reply New Poll New Poll Search     Search Page [1]  
1/30/16 8:12am - Original Message: 'Radiator question'
Cbarison
Standard Member
- Send Private Message


Eastchester, NY - USA

Vette(s):
1987 c4

Joined: 6/25/2014
Posts: 31
Question I cannot find the answer to; under the radiator cap & below the coolant line fitting there's a hole, does it need to be capped? does coolant just spill out when it gets hot? i'm getting the coolant low message but there are no codes when I connect the code scanner. also the coolant temp reads 299 when clearly its not that hot. its an '87 C4. I really appreciate any help on this. Cbarison

____________________________________
 Reply Reply  Quote Reply w/Quote
 
Support C4VR!
Suport our advertisers
1/30/16 10:50am - Reply: 'Re: Radiator question'
Adams' Apple
Standard Member
Moderator
- Send Private Message


Duncanville, TX - USA

Vette(s):
1985 Coupe-L98/Auto,Bright Red/Carmine. 1974 Coupe-L48/4speed, Medium Red Metallic/Black Deluxe.

Joined: 3/18/2009
Posts: 2094
Can you get a pic of this "hole"? If there is coolant blowing it of it when running, then yes, it needs to be plugged. Just not clear on where this hole is...
299f temp is obviously incorrect...could simply be a bad temp sensor, or a short in the sensor wiring.


____________________________________
Joel Adams  
My Link

 
   
(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
 Reply Reply  Quote Reply w/Quote
1/30/16 11:00am - Reply: 'Re: Radiator question'
Cbarison
Standard Member
- Send Private Message


Eastchester, NY - USA

Vette(s):
1987 c4

Joined: 6/25/2014
Posts: 31
Its the hole right under the white letter K-85 or K-86, yes cololant does spill out when running, could it be I'm missing a coolant line that should go somewhere else? is there a sensor missing? the coolant temp sensor on an '87 is under the throttle body. I'll take a pic as soon as I can. Thanks Cbarison

____________________________________
 Reply Reply  Quote Reply w/Quote
1/31/16 2:48pm - Reply: 'Re: Radiator question'
The Car Whisperer
Standard Member
- Send Private Message


Andover, MA - USA

Vette(s):
1986 Coupe

Joined: 3/22/2009
Posts: 48
I think you may be talking about the coolant level sensor, it just snaps in and has one wire going to it.  Rock Auto has them for less than $15.00.


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

Automatic, Bilsteins - "Mostly Original" otherwise.

 Reply Reply  Quote Reply w/Quote
2/21/16 7:51am - Reply: 'Re: Radiator question'
Cbarison
Standard Member
- Send Private Message


Eastchester, NY - USA

Vette(s):
1987 c4

Joined: 6/25/2014
Posts: 31
Yeah, sure enough, it was the radiator sensor missing from that hole! It was pinned underneath the car, so I didn't see it from up top. Its now in and the coolant temp and levels are normal.

Thanks for all the help guys!

The car is running like a beast! The idle is still all over the map, when stopped at a red light it'll go from 6 all the way up th 14. Besides having the car dyno-tuned, is there some sort of idle regulator one could add-on?

Thanks again,
Cbarison 




____________________________________
 Reply Reply  Quote Reply w/Quote
2/21/16 8:05am - Reply: 'Re: Radiator question'
The Car Whisperer
Standard Member
- Send Private Message


Andover, MA - USA

Vette(s):
1986 Coupe

Joined: 3/22/2009
Posts: 48
Sounds like a Vacuum leak.  Can you check around and see if you have a disconnected vacuum hose?  That's the first thing I would l would look for.  Sounds like a large leak.  



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

Automatic, Bilsteins - "Mostly Original" otherwise.

 Reply Reply  Quote Reply w/Quote
2/21/16 9:40am - Reply: 'Re: Radiator question'
Cbarison
Standard Member
- Send Private Message


Eastchester, NY - USA

Vette(s):
1987 c4

Joined: 6/25/2014
Posts: 31
My local mechanic found a massive vacuum leak and fixed it. Since I changed the headers, I had to leave the O2 sensor unconnected. I'm thinking that may have something to do with it as the engine is running in an open loop mode.

The EGR pip has been covered up for the same reason, I wonder what the right thing to do is with this O2 sensor


____________________________________
 Reply Reply  Quote Reply w/Quote
2/21/16 10:46am - Reply: 'Re: Radiator question'
The Car Whisperer
Standard Member
- Send Private Message


Andover, MA - USA

Vette(s):
1986 Coupe

Joined: 3/22/2009
Posts: 48
My basic understanding is that O2 sensor reads your exhaust output and with the reading from the MAF sensor that is sent to the On-Board computer to adjust the fuel injector pulses to maintain as close to 14:1 ratio of air to fuel.  

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

Automatic, Bilsteins - "Mostly Original" otherwise.

 Reply Reply  Quote Reply w/Quote
 New Topic New Topic Post Reply Reply New Poll New Poll Search     Search Page [1]  
 Forums -> C4 Cooling and Heating Systems
(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 2001-2017, 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