Anonymous asked in Cars & TransportationMaintenance & Repairs · 2 months ago

How dangerous is a car with a rusted subframe to drive?

My mechanic told me my subframe is very rusty. Is it dangerous to drive a car with a rusty subframe?

13 Answers

  • 2 months ago

    GET ANOTHER OPINION and another LOOK for YOURSELF! SURFACE Rust is ONE THING and trhe SUBFRAME carries the entire POWER TRAIN< engein and TRANS!I have SEEN subframe twist around and DUMP the power trains in=on the highway THERE SHOULD BE LAWS about this and SUBFRAMES should be MADE of BETTER materials! It is WHY AMERICA will NOT be as GREAT as A HOLE TRUMOP wants it to be! We make a l LOT of TEMPORARY products! We have JUNK in our food supplies that cause HARM to us! ANYWAYS< Go to a REAL FRAME SHOPE and see what they have to say There are MANY of them around! IN DETROT we have SEVERAL that are trustworthy! 

  • 2 months ago

    It depends on just how advanced the rust was into the frame. Every metal with few exceptions will rust if exposed, and sometimes it can be just superficial. But if the rust has advanced into the structure, it could very well compromise the frames integrity. Our Automotive teacher from Chrysler told us a story about a contest held each year on a California beach where contestants entered their vehicle for being the rustiest to win a prize. One year the one that came in second in the contest to be the rustiest broke in two and had to be towed off the beach. Makes you wonder what the winner looked like!

    Source(s): Chrysler Master Tech. Retired.
  • 2 months ago dangerous as jumping out a 2nd floor window.

  • ?
    Lv 6
    2 months ago

    Didn't you ask the mechanic? Why do you think he said that?

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  • F
    Lv 7
    2 months ago

    The question is,Is it structural? Surface rust is ok , any car will have it where they use salt in the roads in winter. It generally looks worse than it is.

    If it affects the strength it is obviously dangerous. Sometimes they corrode around fixing holes and so can work loose and be dangerous even if the main part is ok.

    The answer that only old cars and trucks have subframes us wrong. He’s confusing them with a full frame chassis. 

    Unibody cars have subframes to carry the heavy parts like the engine and diff abd improve crash protection.They also provide additional rigidity needed in high performance cars. 

  • Anonymous
    2 months ago

    Repeat question reported.. 

  • Anonymous
    2 months ago

    Car?  What Year.? It matters as they made them for 100 years.   Cars with frames (like domestics from any that are RWD so that goes back to the early years.  Many of them are still on the road today.  So is basically every pickup truck.  The frame is made out of steel(not tin foil) and that lasts a long time even with rust. Your mechanic would have advised right there and then what you need to do.  If he said nothing, then there is nothing to talk about.  When there is gaping holes in the frame due to rust(and that would have to be a car that has spent every winter in the salted roads on the highways, it still would take 10 years before it is a concern as the car has undercoating that does most of the protection for those years. In maybe 1000 car repairs I have run across 2 that was seriously rusted.

    . Ask at an autobody shop or a frame shop or a mechanic near you to eyeball the situation.

    Your mechanic is just a jerk, for he did not say anything more.  Just creates paranoia in you.

  • Anonymous
    2 months ago

    Gotta see it for yourself.

  • arther
    Lv 5
    2 months ago

    If it breaks in half if you have a minor accident and you kill somebody in worst case situation, did the mechanic say what to do about it?

  • 2 months ago

    This is a matter of degree.  The fact that your mechanic is warning you, suggests that it is dangerously rusty.  Might fully collapse in an accident, or might drive fine for years if there is no stress on it.

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