stilbo
Well-Known Member
- Joined
- May 30, 2000
- Messages
- 144
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- City, State
- Bloomington, Indiana
- Year, Model & Trim Level
- 2015 XL Base
This is the follow-up to thread "BENT SPARK PLUG ELECTRODES".
Anyone melt their manifolds out there? How can one do this? Why would one do this? I miss aluminum inake manifolds...
Eureka....
Guess what gives a "lean mixture code" and misfiring in multipole cylinders (316)...
HOLES IN INTAKE MANIFOLD AND MELTED INSIDES!
I pulled the intake to start replacing the injectors ($38.00 at Advance Auto but they were out of them and did not show any in warehaouses but still cheap..)
I pulled the intake manifold and there's a normal amount of goo and black crud here and there and then I look into #6 and #5 runners in the manifold and notice what looks to be great gobs of black greasy spooge deposits... I stick my finger in to give it a wipe and it's as hard as..... PLASTIC! Then I see it... the runners are melted inside, some of the plastic has been sucked down past the o-rings, there are giant long vacuum extruded plastic sprues taking up a good deal of the inside, the base near the 0-rings is distorted and when I looked at the outside.... THREE HOLES ABOUT 1/16" DIAMETER! I had a stethescope with the open ended hose on it yesterday because I could have sworn I heard a vacuum leak.... I checked the manifold bolts for torque and they were okay so figured since I'm not familiar with this engine, it must be normal noise that sounds like a vacuum leak... WRONG!
Now it starts to make sense... The beauty cover that covers the throttle body was gone when I bought the truck... apparently some numb nutz must have been squirting highly flamable stuff into the intake and it backfired?
Or.... maybe ?
Now I'm not sure that I need to replace $300 - $400 worth of injectors...
I found the manifold online for $202 at Ford Parts Direct... the dealer qouted me $275 over the phone but they usually come down when I show up in person.....
Just how in the hell does one melt the intake manifold?
I'd imagine that valves and rings are tougher than ABS plastic at 1000 degrees.....