How do you measure your vacuum and air hoses under the hood for replacements? I'd like to avoid OEM because the prices seem pretty ridiculous, but my car is over 20 years old now and the hoses and rubber are drying out, and it seems like this would be something you could find easily in aftermarket
Inner diameter is how it's specified. Take a 1/4 open end wrench, if it fits closely on the pipe in question you will use 1/4 ID line, etc. Generally speaking you can be a little undersized and the hose will stretch enough to fit. 1/8 ID line is quite common for those little lines under the hood. Silicone is my preference, you can buy bulk on Amazon.
>>28855238If it's easy to access, then just use a tape measure or trace the pipe with a piece of string. If it's not easy, then you're probably best to take it off first, then measure it.You don't have to get OEM hose, but get *good* hose - cheap rubber will dry rot within a year. If the hoses you're replacing don't see any oil vapors, such as the CCV, then consider silicone hoses as they will likely last the life of the car. The reason I say to avoid oil vapors is because silicone has micropores, and it will absorb and "sweat" any oil out through it's surface. Not a huge problem as such, but it just looks shit and is horrible to touch.
>>28855251>>28855264Ill go out and check the ID on these hoses. I've seen some people on Toyota forums say these hoses are 5mm ID, its a bit tricky because the ends are usually stretched out, but i dont want to cut it in the middle, so i can subtract a mm off the measurement.>>28855264these will be mainly vacuum hoses for now. The fuel/oil/coolant hoses will be for another time. i think i've finally decoded the hose diagram on the engine, which is a 1MZ-FE with VVTi, so its got some extra hoses for the ACIS system. Among other things I would like to replace some of these hoses, or just pay to get a smoke test done to see if anything even needs to be replaced at all. but given that the car is 23 years old its probably likely.what I dont know is what the red circled hoses do. There is an actuator seems like it keeps the throttle valve at rest open like 1%, but when vacuum is applied it closes the throttle fully .
>>28855238Take them off, go to parts store, buy what you need.
>>28855264Would avoid silicone for anything other than boost/vacuum. Silicone coolant hoses are proven to evaporate coolant which makes you think your car has a leak/consumption issue.
theyre cut to length stupid.just get like 1/4" and 3/8" silicone hose.
>>28855563yeah i realized i should said hose diameter not length.>>28855552>>28855264what about hoses the go to the throttle body/intake. its only supposed to be air but eventually carbon and oil get in there too
>>28855238check out amayama, they sell oem toyota shit for way cheaper BUT expect it to take 2-3 months to arrive so build up a shopping list
Inner diameter. Quality EPDM rubber. Reference a distributor like McMaster Carr or similar. Amazon and Ebay or Google searches will only get you unreliable chinatrash as 99/100 results. Have to find what you really need first before using those shit sources.>what about the intake partsOEM stuff is usually glass-fiber nylon for the hard plastics and other heat-oil tolerant plastics/polymers for tubing. And real quality-rated shit, again not your 1 page search result Amazon "whatever the fuck this is let's take a chance"
>>28855251Silicone lines absorb water
>>28855669so not this stuff?https://www.amazon.com/Ucreative-Temperature-Silicone-Vacuum-Tubing/dp/B0BFB6VPY9?th=1
>>28855238Go to a hose shop. They'll measure, bend, cut, and stick whatever fittings you need on it.
