Go Back   Ford Truck Enthusiasts Forums > Performance, Engines & Troubleshooting > Ford Inline Six, 200, 250, 4.9L / 300
Sign in using an external account
Register Forgot Password?


Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
LinkBack Thread Tools Search this Thread
  #1 (permalink)  
Old 06-03-2003, 07:36 PM
F150Lariat79's Avatar
F150Lariat79 F150Lariat79 is offline
Senior User
 
Join Date: Aug 2002
Location: Indianapolis USA
Posts: 176
F150Lariat79 is starting off with a positive reputation.
Question 300-6 Exhaust Manifold Gasket---Should one be used ???

Howdy,

When I replaced exhaust manifold last year on my

300-6, I used a name-brand gasket. I now have some

small exhaust leaks which I can hear. Ford originally used

no gasket, and some recommend this. I have a '79 engine

with used manifold from '83---do you think I'd have problem

if I removed gasket ? Do they seal well without ?

Thanks. J.R.
__________________
'96 F-150 XLT Supercab SB from Oklahoma
Reply With Quote
  #2 (permalink)  
Old 06-09-2003, 03:45 AM
Pkupman82's Avatar
Pkupman82 Pkupman82 is offline
Postmaster
 
Join Date: Feb 2003
Location: Muskegon, MI (home)
Posts: 2,992
Pkupman82 is gaining momentum as a positive member of FTE.Pkupman82 is gaining momentum as a positive member of FTE.
300-6 Exhaust Manifold Gasket---Should one be used ???

As cast iron parts are heated and cooled they don't seal very well, they have a tendency to warp. 300 I6 exhaust and intake manifolds warp easily if they are not torqued down properly. I start on the inside bolts and work outward in a staggered pattern. I had similar problems with my 84s manifolds leaking, the best fix for it is to install two gaskets doubled up. I did mine over two years ago and haven't had a problem since.
__________________
1977 Ford F250 XLT Ranger 4wd/ 351m/ NP435/ 205
1979 Ford Bronco XLT Ranger/ 460/ C6/ 205
1984 Ford F250 XL 4wd/ 6.9 IDI/ C6/ BW1345
1984 Ford F150 4wd/ 300/ NP435/ 208
1996 Ford F150 XLT 4wd/ 300/ ZF5/ BW1356
Reply With Quote
  #3 (permalink)  
Old 06-10-2003, 08:34 PM
F150Lariat79's Avatar
F150Lariat79 F150Lariat79 is offline
Senior User
 
Join Date: Aug 2002
Location: Indianapolis USA
Posts: 176
F150Lariat79 is starting off with a positive reputation.
300-6 Exhaust Manifold Gasket---Should one be used ???

Thanks---I did torque bolts according to factory manual,

but used one gasket set. Have heard of doubling gaskets, but

was concerned about durability. Do you use regular donut

gasket or sintered metal ? I used the metal thinking it might

seal better & last longer. Or does the '84 even use the flange

gasket ? Just remembered the newer manifolds changed

design... What brand gaskets do you use ? Think mine is

Fel-pro. J.R.
__________________
'96 F-150 XLT Supercab SB from Oklahoma
Reply With Quote
  #4 (permalink)  
Old 06-10-2003, 09:27 PM
tetraruby tetraruby is offline
Posting Guru
 
Join Date: Mar 2001
Posts: 1,494
tetraruby is starting off with a positive reputation.
300-6 Exhaust Manifold Gasket---Should one be used ???

I'm in the same boat. Did mine a year ago, had both manifolds machined together. The intake sealed horribly with just the single piece (I removed the stapled intake one). I put the two piece set back on and one year later I have a minor exhaust leak. I blame myself for not retorquing the bolts shortly afterwards...or maybe my head is bowing that much. I'm doing the gasket job tomorrow...always easier the second time. My exhaust pipe is far from perfectly circular, the metal and sintered metal dougnuts are too rigid to fit my obround exuast pipe. The blue one is crap, I usually buy the shiney composite one. I have terrible sealing problems with those dougnuts... when I start plans on the aftermarket exhaust system for my truck I'll have to ensure there isn't a lot of stress at the union - I suspect the root cause of my dougnut problem. I'm not sure if you have a "Carquest" around, but the shiney is PN F17250
Reply With Quote
  #5 (permalink)  
Old 06-11-2003, 04:02 AM
Pkupman82's Avatar
Pkupman82 Pkupman82 is offline
Postmaster
 
Join Date: Feb 2003
Location: Muskegon, MI (home)
Posts: 2,992
Pkupman82 is gaining momentum as a positive member of FTE.Pkupman82 is gaining momentum as a positive member of FTE.
300-6 Exhaust Manifold Gasket---Should one be used ???

Oh I thought you were talking about where the manifold meets the head, maybe you were but that is the best fix for that problem. As for the down pipe from the manifold, mine does not use a donut gasket. I think I would use the sintered metal donut I would think it would be softer and would probably seal better.
__________________
1977 Ford F250 XLT Ranger 4wd/ 351m/ NP435/ 205
1979 Ford Bronco XLT Ranger/ 460/ C6/ 205
1984 Ford F250 XL 4wd/ 6.9 IDI/ C6/ BW1345
1984 Ford F150 4wd/ 300/ NP435/ 208
1996 Ford F150 XLT 4wd/ 300/ ZF5/ BW1356
Reply With Quote
  #6 (permalink)  
Old 06-11-2003, 08:45 PM
F150Lariat79's Avatar
F150Lariat79 F150Lariat79 is offline
Senior User
 
Join Date: Aug 2002
Location: Indianapolis USA
Posts: 176
F150Lariat79 is starting off with a positive reputation.
300-6 Exhaust Manifold Gasket---Should one be used ???

Hey Pkupman---yes, was talking about exhaust manifold

originally. Just wanted opinion on doughnut, also---didn't

think yours used one... Thanks for info. Wonder how many

others have doubled gaskets. Did you use both intake gaskets

also, or just 2 exhaust with one intake ??? Good luck

Tetraruby with your leakage---let us know how it turns out.

Thanks again. J.R.
__________________
'96 F-150 XLT Supercab SB from Oklahoma
Reply With Quote
  #7 (permalink)  
Old 06-11-2003, 09:11 PM
tetraruby tetraruby is offline
Posting Guru
 
Join Date: Mar 2001
Posts: 1,494
tetraruby is starting off with a positive reputation.
300-6 Exhaust Manifold Gasket---Should one be used ???

Did it today. As I suspected the dougnut was the major problem. There were no obvious leaks at the gasket, but I figured while I was at it to replace it anyway. Problem fixed...for now. Sounds a lot better.
Reply With Quote
  #8 (permalink)  
Old 06-14-2003, 01:37 AM
Pkupman82's Avatar
Pkupman82 Pkupman82 is offline
Postmaster
 
Join Date: Feb 2003
Location: Muskegon, MI (home)
Posts: 2,992
Pkupman82 is gaining momentum as a positive member of FTE.Pkupman82 is gaining momentum as a positive member of FTE.
300-6 Exhaust Manifold Gasket---Should one be used ???

I used double gaskets on both manifolds. An old timer engine builder told me the best way to install the manifold gaskets is to loosen the bolts that hold the two manifolds together, bolt the manifolds to the block, torque them down, then torque down the bolts that hold the manifolds together. Do it this way and you should have NO problems with intake or exhaust leaks for a very long time.
__________________
1977 Ford F250 XLT Ranger 4wd/ 351m/ NP435/ 205
1979 Ford Bronco XLT Ranger/ 460/ C6/ 205
1984 Ford F250 XL 4wd/ 6.9 IDI/ C6/ BW1345
1984 Ford F150 4wd/ 300/ NP435/ 208
1996 Ford F150 XLT 4wd/ 300/ ZF5/ BW1356
Reply With Quote
  #9 (permalink)  
Old 06-14-2003, 01:41 AM
Pkupman82's Avatar
Pkupman82 Pkupman82 is offline
Postmaster
 
Join Date: Feb 2003
Location: Muskegon, MI (home)
Posts: 2,992
Pkupman82 is gaining momentum as a positive member of FTE.Pkupman82 is gaining momentum as a positive member of FTE.
300-6 Exhaust Manifold Gasket---Should one be used ???

Forgot to mention I use Fel Pro brand gaskets I have had good luck with them, I used them when I rebuilt my engine...3 years ago and no leaks still!
__________________
1977 Ford F250 XLT Ranger 4wd/ 351m/ NP435/ 205
1979 Ford Bronco XLT Ranger/ 460/ C6/ 205
1984 Ford F250 XL 4wd/ 6.9 IDI/ C6/ BW1345
1984 Ford F150 4wd/ 300/ NP435/ 208
1996 Ford F150 XLT 4wd/ 300/ ZF5/ BW1356
Reply With Quote
  #10 (permalink)  
Old 06-18-2003, 02:54 PM
thrakkor thrakkor is offline
New User
 
Join Date: May 2002
Location: Colo Spgs USA!!!
Posts: 21
thrakkor is starting off with a positive reputation.
300-6 Exhaust Manifold Gasket---Should one be used ???

i also use 2 gaskets sandwiched together. however, i also used the copper gasket material between them as well as on the block around the exhaust ports and on the header flanges.

not a leak and i haven't even tightened them since
Reply With Quote
  #11 (permalink)  
Old 09-27-2013, 09:49 PM
MTmtntinkeringagain MTmtntinkeringagain is offline
Freshman User
 
Join Date: Jan 2011
Location: Bull Mtns
Posts: 28
MTmtntinkeringagain is starting off with a positive reputation.
Doubling Up

This last Spring, had intake/out take manifolds ALMOST out. Couldn't get to that dad gum blot hidden behind the carb mt. 79 300 Inline 6. Left it to someone who said they knew…..Have metal type gasget in there now, but leaking, sounds horrible. Put on new 1 brl Carb, not sure had anything to do with….Really annoyed with same 'helper', who mixed up Alternator lines…*why take alter. out?*
Least I know now to have TWO gaskets on hand. As someone said, Should be easier the 2nd time and without the 'Jeep' helper…..Gggrrrrr
Now where did I put that 2x4 again? Nah, time to cut wood, will MAKE what is NEEDED for helpers!!
Reply With Quote
  #12 (permalink)  
Old 09-28-2013, 02:42 PM
fordman75 fordman75 is offline
Postmaster
 
Join Date: Dec 2000
Location: South central, Minnesota
Posts: 3,166
fordman75 has a very good reputation on FTE.fordman75 has a very good reputation on FTE.fordman75 has a very good reputation on FTE.
If you guys want a good exhaust manifold gasket, check out: FORD Header/Exhaust Manifold Gasket

Not cheap but a really good gasket.
__________________
Ted

1954 F100 4x4, 300, NP435/NP205
Reply With Quote
  #13 (permalink)  
Old 09-28-2013, 03:37 PM
Harte3 Harte3 is offline
Postmaster
 
Join Date: Dec 2006
Location: Spokane, WA
Posts: 3,167
Harte3 is gaining momentum as a positive member of FTE.Harte3 is gaining momentum as a positive member of FTE.
IIRC some use a Mr. Gasket M260 with good results.
__________________
1983 F150 300 I6, Comp Cam 260h and lifter kit, Port/Polished head, Offy DP Manifold, Holley 4160/1848-1 465 cfm, EFI Exhaust manifolds, Walker Y Pipe to 3-Way Cat, generic Turbo Muffler, Recurved DSII, Mallory HyFire 6a & ACCEL Super Stock Coil, Taylor Spiro Pro Wires, EFI plugs.
"It'll put out what ever it puts out." fordman75
Reply With Quote
  #14 (permalink)  
Old 09-28-2013, 09:34 PM
MTmtntinkeringagain MTmtntinkeringagain is offline
Freshman User
 
Join Date: Jan 2011
Location: Bull Mtns
Posts: 28
MTmtntinkeringagain is starting off with a positive reputation.
Smile Thx for info

Yeah, they are a BIT more. Fall coming fast around here so will put off but save pg for spring, when firewood done. Going to look around for better gaskets also. Good point/option. Not like there aren't other things the old girl needs to have worked on! Thanks for the help, suggestions, yada, yada.
Oh, off topic, but with new carb got 11.4 MPG Pretty damn good for 300 I6 F150, right?
Tinker~
Reply With Quote
  #15 (permalink)  
Old 09-28-2013, 09:45 PM
F-250 restorer's Avatar
F-250 restorer F-250 restorer is offline
Postmaster
 
Join Date: Mar 2008
Posts: 3,963
F-250 restorer has a good reputation on FTE.F-250 restorer has a good reputation on FTE.
I would throw away the oem bolts (since they've been heated and cooled a million times not) and use grade 8 studs, 3/8" 18 thread into the head with copper anti seize compound on threads, and 3/8" 24 thread with a high quality crimp nut on that. I use the mr.Gasket 260, and three years later have zero problems. BUT, I installed by torquing to half torque first, working in an counter-clockwise spiral from center out, went back and torques in same fashion to full spec. After engine is run to full heat, let it cool completely and retorque, and repeat one more time and forget about it.

The gasket in the link looks super. I think the Mr. Gasket 260 costs $25 alone. For $20 more I'd certainly try that gasket.
__________________
http://bit.ly/P2P3ug
http://bit.ly/zpnFTl</a>.<font size=3>

[SIGPIC]
Old 09-28-2013, 09:45 PM
Reply

Go Back   Ford Truck Enthusiasts Forums > Performance, Engines & Troubleshooting > Ford Inline Six, 200, 250, 4.9L / 300

Tags
300, 3006, 79, exhaust, ford, gasket, inline, installation, manifold, washers

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On
Forum Jump



All times are GMT -5. The time now is 02:27 PM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.5.2 ©2010, Crawlability, Inc.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup