Vacuum Line Sizes - MR2 Owners Club Message Board
 
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post #1 of 3 (permalink) Old January 9th, 2017, 14:08 Thread Starter
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Vacuum Line Sizes

I'm looking to get new silicone vacuum lines (in red) and redo the whole engine bay, just to be sure I don't have any more leaks (and fix my idling problem, which I'm sure has something to do with it). I want to buy a kit, but I'm not sure what sizes I need and how much of each I need. Has anyone done this before that could give me some reference?
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post #2 of 3 (permalink) Old January 9th, 2017, 14:26
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I did a silicone hose swap on one of my previous cars, but I can't for the life of me remember where I purchased the kit from... This was 3-4 years ago so they might not even be in business anymore, but the hose was pretty forgiving as far as size goes.

Here's what I would suggest:
1.Look through the engine bay for the 2-3 different sizes of vacuum hose and measure the inner and outer diameter so you can look for a similar size silicone hose.
2.Then grab some string and a tape measure, put the string on one of a hose and follow its contour to the other end, then measure the straight length of the string against the tape measure to get an approx. hose length.
3.Add up all these lengths for the given size of that hose and you can order enough silicone hose to make each piece.

Silicone hose is very easy to cut, I have a cutter from my kit that's like a cigar cutter and works great, but a utility knife would be like cutting butter. And just a suggestion, but unless you have a red car with a lot of other red accents, I would just pick up some black silicone hose so it doesn't get too "ricey" in the engine bay.
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post #3 of 3 (permalink) Old January 10th, 2017, 14:11 Thread Starter
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Quote:
Originally Posted by snowrider View Post
I did a silicone hose swap on one of my previous cars, but I can't for the life of me remember where I purchased the kit from... This was 3-4 years ago so they might not even be in business anymore, but the hose was pretty forgiving as far as size goes.

Here's what I would suggest:
1.Look through the engine bay for the 2-3 different sizes of vacuum hose and measure the inner and outer diameter so you can look for a similar size silicone hose.
2.Then grab some string and a tape measure, put the string on one of a hose and follow its contour to the other end, then measure the straight length of the string against the tape measure to get an approx. hose length.
3.Add up all these lengths for the given size of that hose and you can order enough silicone hose to make each piece.

Silicone hose is very easy to cut, I have a cutter from my kit that's like a cigar cutter and works great, but a utility knife would be like cutting butter. And just a suggestion, but unless you have a red car with a lot of other red accents, I would just pick up some black silicone hose so it doesn't get too "ricey" in the engine bay.
That's true. I already have a red intake hose and pretty soon I will have red valve covers. I'll go with black then.

Though the only size I know for sure is in there is 4mm hose, but I don't really know how much or what actually uses that size. I'll do some work once I get time and figure out how much I need.
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