Burnt carb gasket
Thread Starter
|
Freshman User
Joined: Sep 2007
Posts: 25
Likes: 0
Burnt carb gasket
My 86 F250 460 keeps burning the carb. gasket at the passenger side rear corner just above the EGR valve creating a bad vacuum leak. Does anyone have an idea where all that heat is coming from? I know there is alot of heat involved with the EGR but to Burn the gasket like that? Any info would be great
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
What kind of gasket are you using? The gasket between the carb and the spacer should be about 1/4 thick, with grommets where the carb studs go through. It acts as a heat sink. The gasket between the spacer and the manifold is supposed to be a thick steel-woven type. The paper-thin gaskets that come in rebuild kits are junk.
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
No, it should not get that hot. By 86, all spacer plates should have been made from cast iron. I would inspect the spacer plate to make sure it's not cracked or warped. Otherwise I would suspect the engine is running too hot; perhaps the timing is off? Something is make your exhuast hotter than it should be.
Thread Starter
|
Freshman User
Joined: Sep 2007
Posts: 25
Likes: 0
Thanks for your responce,the truck runs right at 200 deg. I've put a mech. temp gauge on it instead of the factory one.I'll check the spacer plate as I have the carb. off now, I didnt want to put back together until I got some idea what was going on.
thanks again
thanks again
Senior User
Joined: Nov 2000
Posts: 285
Likes: 1
From: sunny san diego
Been there, done that. I have used every gasket combination and the best gaskets are Felpro for the carb to EGR spacer and Napa for the EGR spacer to manifold. Applying a thin film of anti-sieze compound to all surfaces will make it last a long time.
Post Fiend
Joined: Oct 2003
Posts: 9,176
Likes: 4
From: Western Central NV
The gasket between the EGR an manifold are made for heat. They are a special gasket. They are not the 1/4 gasket. I have an 86 F250 4x4 460. The heat comes from the EGR. The exhaust gases are routed through it. An EGR EMISSION GAS RECIRCULATION VALVE. It allows for reburning exhaust gases.
Trending Topics
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
Originally Posted by kermmydog
The gasket between the EGR an manifold are made for heat. They are a special gasket. They are not the 1/4 gasket.
Last edited by fmc400; Sep 28, 2007 at 08:07 AM.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
Post Fiend
Joined: Oct 2003
Posts: 9,176
Likes: 4
From: Western Central NV
Originally Posted by fmc400
I didn't say to use the 1/4" gasket for the spacer to manifold; I specifically said the 1/4" gasket is for the carb to spacer.
Thread
Thread Starter
Forum
Replies
Last Post
RustyTrustyF150
Fuel Injection, Carburetion & Fuel System
1
Oct 7, 2013 09:42 PM
tylert1976
1973 - 1979 F-100 & Larger F-Series Trucks
15
Oct 6, 2013 06:50 PM
squidMaurin
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
7
May 18, 2009 10:32 PM
