Notices
1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck
Sponsored by:
Sponsored by: Moser

79 questions

Thread Tools
 
Search this Thread
 
Old Nov 20, 2013 | 05:31 PM
  #1  
1979 300i6's Avatar
1979 300i6
Thread Starter
|
Senior User
Joined: Jan 2013
Posts: 303
Likes: 0
79 questions

I went to change the thermostat in my 300i6 and after I put the new one in and reassemble now I cant get it to stop leaking at the housing where it bolts on to the head, it leaks at the bottom corner of the housing on the passandger side, I've tried taking taking it off and applying RTV silicone on the gasket, put a fel-pro gasket on it but it still wants to leak. An other less serious problem is half my dash light up "clear" opposed to green on the drivers side, any thoughts?
 
Reply
Old Nov 20, 2013 | 05:44 PM
  #2  
GM4WALLS's Avatar
GM4WALLS
Posting Guru
Joined: Feb 2013
Posts: 1,323
Likes: 3
From: Sunny Florida
If your thermostat housing is leaking, it is either some left behind gunk on the mating surface, or a pinhole in the housing. Examine both closely.
 
Reply
Old Nov 20, 2013 | 05:48 PM
  #3  
hivoltj's Avatar
hivoltj
Cargo Master
15 Year Member
Photogenic
Liked
Loved
Joined: Apr 2010
Posts: 2,600
Likes: 64
From: Billings, MT
I only counted one question, where are the other 78?


Your t-stat housing is probably warped, check it with a straight edge.

Your bulb covers probably cracked and fell off. There are little green "skins" that fit over the dash bulbs to give the color.
 
Reply
Old Nov 20, 2013 | 05:51 PM
  #4  
1979 300i6's Avatar
1979 300i6
Thread Starter
|
Senior User
Joined: Jan 2013
Posts: 303
Likes: 0
Lol yeah I mean "79 truck questions" I'll check everything out tomorrow
 
Reply
Old Nov 22, 2013 | 08:00 PM
  #5  
1979 300i6's Avatar
1979 300i6
Thread Starter
|
Senior User
Joined: Jan 2013
Posts: 303
Likes: 0
Ok fixed the leaking problem, but what do you mean by them "green skins" over the bulbs look like and how do you replace them?
 
Reply
Old Nov 22, 2013 | 08:16 PM
  #6  
HIO Silver's Avatar
HIO Silver
Fleet Owner
Joined: Dec 2009
Posts: 20,678
Likes: 82
From: NorCal
Originally Posted by 1979 300i6
Ok fixed the leaking problem, but what do you mean by them "green skins" over the bulbs look like and how do you replace them?
It's a green-tinted rubber or plastic cap that covers the bulb... like a condom.

Schwing!
 
Reply
Old Nov 22, 2013 | 09:09 PM
  #7  
1979 300i6's Avatar
1979 300i6
Thread Starter
|
Senior User
Joined: Jan 2013
Posts: 303
Likes: 0



i took out the instrument panel out to get a better look, this is were the bulb went that lights up that side of the dash, when i took out the bulb it had no green skin just the bulb.
 
Reply
Old Nov 22, 2013 | 09:15 PM
  #8  
1979 300i6's Avatar
1979 300i6
Thread Starter
|
Senior User
Joined: Jan 2013
Posts: 303
Likes: 0


This is what the side looks like that is lighting up normal (without the bulb), is that blue looking thing inside what you guys are referring to as the green skin?
 
Reply
FTE Stories

Ford Trucks for Ford Truck Enthusiasts

story-0

Top 10 Ford Truck Tragedies

 Joe Kucinski
story-1

AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

 Brett Foote
story-2

Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

 Michael S. Palmer
story-3

Ford's 2001 Explorer Sportsman Concept Looks For a New Home

 Verdad Gallardo
story-4

10 Best Ford Truck Engines We Miss the Most!

 Joe Kucinski
story-5

2026 Shelby F-150 Off-Road: Better Than a Raptor R?

 Brett Foote
story-6

2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

 Michael S. Palmer
story-7

10 Most Surprising 2026 Ford Truck Features!

 Joe Kucinski
story-8

Top 10 Ford Trucks Coming to Mecum Indy 2026

 Brett Foote
story-9

5 Best / 5 Worst Ford Truck Wheels of All Time

 Joe Kucinski
Old Nov 22, 2013 | 09:15 PM
  #9  
Twanstyle's Avatar
Twanstyle
Junior User
Joined: May 2013
Posts: 89
Likes: 0
really easy way to see what hes talking about is the wiper/lights light on cluster cover. remove clip carefuly by gently squeezing and you will see the blue plastic cover looks the same as the one in the cluster just smaller. also looks like your cluster might be a little brittle ?
 
Reply
Old Nov 22, 2013 | 09:24 PM
  #10  
1979 300i6's Avatar
1979 300i6
Thread Starter
|
Senior User
Joined: Jan 2013
Posts: 303
Likes: 0
Yeah it's probably original to the truck, yeah it's getting a little brittle, I know what your talking about now, so to fix it I would have to take instrument cluster apart? Or?
 
Reply
Old Nov 23, 2013 | 05:24 AM
  #11  
fmc400's Avatar
fmc400
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
Club FTE Gold Member
Originally Posted by 1979 300i6
This is what the side looks like that is lighting up normal (without the bulb), is that blue looking thing inside what you guys are referring to as the green skin?
That's correct; that's the inside of the diffuser. Looks like it's missing on the other side; it may have fallen out at some point.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
RÖENTGEEP
1994.5 - 1997 7.3L Power Stroke Diesel
18
Nov 25, 2009 06:54 PM
towinchebbies
1997 - 2003 F150
2
Apr 28, 2009 09:45 AM
ducedude
1987 - 1996 F150 & Larger F-Series Trucks
17
Mar 28, 2005 08:28 AM
slippery
Cooling, Heating, Ventilation & A/C
10
Jan 15, 2005 04:20 PM
F150eighty4
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
3
Mar 30, 2002 01:18 PM




All times are GMT -5. The time now is 02:26 AM.

story-0
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-1
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-2
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-3
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-4
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-5
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE
story-6
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Slideshow: Everything You Need to Know about the 2027 Super Duty Carhartt Package!

By Michael S. Palmer | 2026-05-07 17:51:06


VIEW MORE
story-7
10 Most Surprising 2026 Ford Truck Features!

Slideshow: 10 most surprising Ford truck options/features in 2026.

By Joe Kucinski | 2026-05-05 11:17:22


VIEW MORE
story-8
Top 10 Ford Trucks Coming to Mecum Indy 2026

Slideshow: Here are the top 10 Fords coming to Mecum Indy 2026.

By Brett Foote | 2026-05-04 13:49:49


VIEW MORE
story-9
5 Best / 5 Worst Ford Truck Wheels of All Time

Slideshow: The 5 best and 5 worst Ford truck wheels of all time

By Joe Kucinski | 2026-04-29 16:49:01


VIEW MORE