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Where’s the brake fluid going? ’90 f-150 no brakes! – Auto Repair Chat

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Come along in this video as I repair a 1990 Ford F-150 that is loosing brake fluid fast but it's not leaking on the ground!? Where the heck could it be going? Don't forget that the brake booster can hold a LOT of fluid before it starts burning it in the engine.
-Enjoy!
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Due to factors beyond the control of South Main Auto Repair, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. South Main Auto Repair assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. South Main Auto Repair recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of South Main Auto Repair, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained.

99 thoughts on “Where’s the brake fluid going? ’90 f-150 no brakes!”
  1. Avataaar/Circle Created with python_avatars Desert Explorer 302 says:

    I once bought a remanufactured brake booster from AutoZone and installed it on my 95 Lincoln Mark VIII. It's quite the job on that particular vehicle. Got it all finished, started the engine and it was bad right out of the box! Major vacuum leak. It was sandblasted just like the one you installed. Moral of the story is NEVER buy remanufactured parts. The quality control is terrible. I'd rather try a used OEM vs remanufactured.

  2. Avataaar/Circle Created with python_avatars Brian Lightfoot says:

    Why aren't replacement boosters painted black like the OEM part? I know that brake fluid and paint don't get along but if the factory suppliers can do it on OEM parts, why not for the replacement parts?

  3. Avataaar/Circle Created with python_avatars Simon Ilett says:

    I'm a little curious when 'nut' and 'bolt' became interchangeable terms? Back in my day they were different things. Both had similar functions but we're quite different to each other. Aside from some tube/pipe fittings, a nut had a hole with a female thread, and a bolt was a cylindrical rod/shank with a male thread. Did I miss the day the collaboration happened, or have the 'enginerds' been lying to me all these years?👈🤣

  4. Avataaar/Circle Created with python_avatars BH Music says:

    Now that's a beautiful truck 😍😍

  5. Avataaar/Circle Created with python_avatars Lrrr Omicron Persei 8 says:

    Congratulations on 750K subs well deserved…

  6. Avataaar/Circle Created with python_avatars tv says:

    Free tip Monday on not pumping the brakes alot to bleed the system. The owner should buy a beater and keep it out of the salt oh yeah oil that step stool thanks

  7. Avataaar/Circle Created with python_avatars Carl Jones says:

    Just bought 90 F-150 2 months ago and love it, very clean rust free came from Las Vegas and no will not see snow/salt in Mich !

  8. Avataaar/Circle Created with python_avatars Ryan's Random Rendevous' says:

    I got a 04 Saturn Vue that eats fluid with no leaks. Great advice. Wish I could support ya besides a like and comment.

  9. Avataaar/Circle Created with python_avatars Ken Rolle says:

    That stool sounds like two skeletons screwing on a tin roof.

  10. Avataaar/Circle Created with python_avatars Karl Murphy says:

    I really like the new Snap-on pliers Eric is using.

  11. Avataaar/Circle Created with python_avatars Mike Huckabay says:

    Hey I really need your help with my car

  12. Avataaar/Circle Created with python_avatars Pins and Screws says:

    "My Harbor Freight Step Stool here…((Not a Sponsor!)) " fixed that for you…

  13. Avataaar/Circle Created with python_avatars Half Fast Garage says:

    That step stool is an abomination!

  14. Avataaar/Circle Created with python_avatars john kendall says:

    Curious I understand why the master cylinder needed replaced but why was the vacuum canister replaced as well instead of just being dumped out.

  15. Avataaar/Circle Created with python_avatars Rusty Robinson says:

    Video quality is nice to watch thanks

  16. Avataaar/Circle Created with python_avatars Ian Mowbray says:

    Every day is a school day, im 56 and l didn’t know that can happen.

  17. Avataaar/Circle Created with python_avatars WildXNature says:

    Half way through and I thought someone was making popcorn or working on some annoying thing in the background. Only to find out it was a stool. 😂

  18. Avataaar/Circle Created with python_avatars John King says:

    My goodness, I’ll send you a new step stool for free if I never have to hear that again 😂😂😂

  19. Avataaar/Circle Created with python_avatars Duane Thumudo says:

    I picked up a pair of those snapon pliers after seeing them on Rainman Ray's channel. Gotta be one of my favorite pliers to use now.

  20. Avataaar/Circle Created with python_avatars jeff rossel says:

    What's that cracking noise

  21. Avataaar/Circle Created with python_avatars Greg Hamilton says:

    Love it! Big Ford guy here. Love my Ford trucks!! Have a 1983 F250 and 1988 F150!

  22. Avataaar/Circle Created with python_avatars Sean Ward says:

    This is probably the only time you can say "I whipped out my tool" on YouTube and not get demonetized.

  23. Avataaar/Circle Created with python_avatars David Hollfelder says:

    Blinker Fluid?😮

  24. Avataaar/Circle Created with python_avatars Nelson Brum says:

    That HF stool sounds like it could use a little Fluid Film. 😉

  25. Avataaar/Circle Created with python_avatars George Cothran says:

    When I replaced the master cylinder on my old 88 ferd I bench bled it with it sitting on the core support and held it with one hand and pumped it with the other. Fortunately though, I had some brake plastick bleeder screws with hose on them. I think I got them with a master cylinder about 1991. Oh and I used an old dull phillips to pump the cylinder. They been in my roll around ever since.

  26. Avataaar/Circle Created with python_avatars Clifford Sandefur says:

    Must be lust, love takes 7 days.

  27. Avataaar/Circle Created with python_avatars 2003RFVert says:

    “Simpler time boys. When men were men and women were women.” – Makes me sad to know where we are as a society and country. Keep up the good work, Eric O! 🇺🇸🇺🇸

  28. Avataaar/Circle Created with python_avatars Seamas Righ says:

    "Simpler time" got me all nostalgic. In the mid 70's I had me a 1966 F100. huge V-8. Loved that beast.

  29. Avataaar/Circle Created with python_avatars Robert Swartzwelder says:

    During that era Ford could not decide I'd they were using metric or SAE. My 90 F350 needs all the wrenches! Love your channel!

  30. Avataaar/Circle Created with python_avatars Daverson says:

    Your noisy Harbor freight stool sounded like popping pop corn in the background, had to pause the video to make some popcorn to finish your great video! West Coast Oregon.🍿

  31. Avataaar/Circle Created with python_avatars Collin Klitz says:

    Sounds like you're standing on a box of soda pop cans with that ladder LOL

  32. Avataaar/Circle Created with python_avatars Louis Harris says:

    Great video Mr O 😊😁

  33. Avataaar/Circle Created with python_avatars Tim C says:

    I love an old ford truck. My dad had a 78 with the straight 6, 3 peddle job.

  34. Avataaar/Circle Created with python_avatars Matthew Holzinger says:

    I have a folding stool from HF. Had to add traction tape. The grit doesn't let me slip anymore .

  35. Avataaar/Circle Created with python_avatars chris knight says:

    I suggest a Kroll treatment for the step ladder. Or fluid film.

  36. Avataaar/Circle Created with python_avatars Edgar Hernández says:

    Hi. How are you?
    how can i improve the braking of an 06 stratus it has new cylinder pads and fluid but not enough grip.
    Greetings!

  37. Avataaar/Circle Created with python_avatars Hola! Craig Goodwin says:

    Had an old Ford Pickup once. Might still be on the road somewhere. Thanks for Sharing!

  38. Avataaar/Circle Created with python_avatars Travis R. says:

    oh it’s stiff alright from what she said haha

  39. Avataaar/Circle Created with python_avatars Hola! Jerry Williamson says:

    this is the kind of stuff i worked my way through college on mostly 60s and 70s easy straight forward.

  40. Avataaar/Circle Created with python_avatars FreeusNow says:

    Don't for get to beed the booster..lady..there's ur problem..

  41. Avataaar/Circle Created with python_avatars Randerz Anderson says:

    I never would have looked there and I have been wrenching cars since you were a youngin. Thanks another great video

  42. Avataaar/Circle Created with python_avatars celia kan says:

    I have a 2012 Mazda 5. Chnaged the master cyclinder 1 year ago, I noticed brake fluid have to keep filling once a month for 100 mil. Is it the same issue as this bad booster?

  43. Avataaar/Circle Created with python_avatars David Sparks says:

    I HAVE SEEN CHEAP REBUILT UNITS…CHRISTMAS TREE HONE…TAPERED END…LEAKS BAD…STONE HONE ONLY…

  44. Avataaar/Circle Created with python_avatars Jon Bingham says:

    PLEASE BROTHER RESPOND TO ME HOW YOU DID THIS WITHOUT GOING TO WEACH WHEEL SYLINDER & CALIPER TO GET ALL THE AIR OUT IF THE LINES. THANK YOU BROTHER GOD BLESS YOU MY BROTHER. 🙂💖

  45. Avataaar/Circle Created with python_avatars Steve says:

    Hope he enjoys it while he had it. HAHAHA!

  46. Avataaar/Circle Created with python_avatars LMacNeill says:

    Man, that was EXACTLY like the master-cylinder/brake-booster replacement job I did in my 1968 Ford Galaxie. Amazing that Ford changed almost nothing in the 22 years between '68 and '90. (The brake-fluid reservoir on my Galaxie was metal, not plastic — that's the only difference I saw) I guess if it works, why change it, eh?

  47. Avataaar/Circle Created with python_avatars David Sparks says:

    BEFORE I EVEN WATCH IT…BRAKE FLUID IN VACUUM BOOSTER…

  48. Avataaar/Circle Created with python_avatars PAC Man says:

    Yep, get a better stand than the Harbor Freight noisemaker….otherwise, great vid