Muffler Installation
- Thread starter pb&j
- Start date
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I replaced my muffler and tailpipe a couple of days ago and I found that I was able to re-use the same bolts between the muffler and "car" but had to get new bolts to join the tailpipe and muffler. The guy at the auto store gave me some free what I am pretty sure are M10s to connect tailpipe to muffler and they worked pretty well.
Observe that there are different thread pitches for M10 bolts. Almost all M10 bolts on your 4Runner as it came from the factory are M10 x 1.25. (If there are exceptions to the 1.25 pitch, I'm unaware of where they are but I'm open to correction.)
The problem with purchasing M10 bolts at a hardware store or Lowes or Home Depot, and even many online places is that they'll probably only have M10 x 1.50 pitch available.
If you're going to such a store for both the nut and the bolt, you'll be OK. However, if you're buying a bolt to thread into a Toyota piece, which is to say the female threads are on the Toyota part, then you've got a problem.
By the way, a similar problem occurs with M12, only here there are 3 pitches: 1.25 (what you'll find on your Toyota) and 1.5 and 1.75 (which is what you'll find in the hardware department).
In M6 and M8, what you'll find on a Toyota matches what the hardware store sells, 1.0 and 1.25 pitch respectively.
The problem with purchasing M10 bolts at a hardware store or Lowes or Home Depot, and even many online places is that they'll probably only have M10 x 1.50 pitch available.
If you're going to such a store for both the nut and the bolt, you'll be OK. However, if you're buying a bolt to thread into a Toyota piece, which is to say the female threads are on the Toyota part, then you've got a problem.
By the way, a similar problem occurs with M12, only here there are 3 pitches: 1.25 (what you'll find on your Toyota) and 1.5 and 1.75 (which is what you'll find in the hardware department).
In M6 and M8, what you'll find on a Toyota matches what the hardware store sells, 1.0 and 1.25 pitch respectively.
