Vac hose size?

sv51macross · 11-22-2010, 03:55 PM

So replacing the injectors/injector seals, I broke more than a couple vac lines and went to get some replacement. I took along one of the old pieces and 5mm has a slightly smaller ID than the old pieces. i come home and test fit the hose before I cut it, expecting it to be snug. It's loose! Do I need 4mm hose, or will it seal well enough...[?] Mazdatrix lists 3.5mm and 6mm hose, but the pieces I removed look bigger than 3.5mm, and are definitely smaller than 6mm.

LunchboxCritter · 11-22-2010, 04:05 PM

I'm running the mazdatrix silicon hose and they fit correctly. I would recommend getting them or some that are the same id. They do look alot smaller than the stretched out oem rubber hose, but I believe that the silicon has alot more stretch than the rubber does.

sv51macross · 11-22-2010, 04:43 PM

SG Imports closes @ 5:30 and I need to prep for class. I'll return the 5mm stuff tomorrow and grab some 3.5mm. I fantasize about the semi-pp 4-port I have planned...sigh.

LunchboxCritter · 11-22-2010, 05:43 PM

It'll be worth all of the trouble.

sv51macross · 11-22-2010, 08:02 PM

Quote:

Originally Posted by LunchboxCritter

It'll be worth all of the trouble.

The semi-PP 13B or the silicone hoses? I have no damn doubt that silicone hoses will be worth the effort. But Lucy's hear needs a rebuild soon anyway, and I want her back together ASAP, so I won't wait for the nice stuff right now.

Rotary Related · 11-30-2010, 03:04 PM

it's the 3.5mm for the small hoses. If you go to autozone they don't have metric hose usually, just fyi.

Max777 · 12-14-2010, 07:53 PM

Yeah, they have 5/16" rubber hose, and that size fits a bit loose, so you need to zip tie each connection.

The 3.5mm silicone stuff works the best for cars IMO.

11-22-2010, 03:55 PM	#1
sv51macross Rotary Fan in Training Join Date: Oct 2010 Location: Ann Arbor, Mi Posts: 47 Rep Power: 0	Vac hose size? So replacing the injectors/injector seals, I broke more than a couple vac lines and went to get some replacement. I took along one of the old pieces and 5mm has a slightly smaller ID than the old pieces. i come home and test fit the hose before I cut it, expecting it to be snug. It's loose! Do I need 4mm hose, or will it seal well enough...[?] Mazdatrix lists 3.5mm and 6mm hose, but the pieces I removed look bigger than 3.5mm, and are definitely smaller than 6mm. __________________ 1990 Mazda RX-7 NA; Lucy, after the main antagonist from Elfin Lied. Eventual plans? Something cyberpunk and spicy.

11-22-2010, 04:05 PM	#2
LunchboxCritter Simply Rotarded Join Date: Jan 2009 Location: Florida Posts: 166 Rep Power: 17	I'm running the mazdatrix silicon hose and they fit correctly. I would recommend getting them or some that are the same id. They do look alot smaller than the stretched out oem rubber hose, but I believe that the silicon has alot more stretch than the rubber does. __________________ LunchboxCritter - 91 NA to J-Spec TII - 88 FC Vert - 04 Rx8 Disclaimer: I am not a mechanic, and I did not sleep at a Holiday Inn. DO NOT TRY THIS AT HOME!!! Last edited by LunchboxCritter; 11-22-2010 at 04:11 PM.

11-22-2010, 04:43 PM	#3
sv51macross Rotary Fan in Training Join Date: Oct 2010 Location: Ann Arbor, Mi Posts: 47 Rep Power: 0	SG Imports closes @ 5:30 and I need to prep for class. I'll return the 5mm stuff tomorrow and grab some 3.5mm. I fantasize about the semi-pp 4-port I have planned...sigh. __________________ 1990 Mazda RX-7 NA; Lucy, after the main antagonist from Elfin Lied. Eventual plans? Something cyberpunk and spicy.

11-22-2010, 05:43 PM	#4
LunchboxCritter Simply Rotarded Join Date: Jan 2009 Location: Florida Posts: 166 Rep Power: 17	It'll be worth all of the trouble. __________________ LunchboxCritter - 91 NA to J-Spec TII - 88 FC Vert - 04 Rx8 Disclaimer: I am not a mechanic, and I did not sleep at a Holiday Inn. DO NOT TRY THIS AT HOME!!!

11-30-2010, 03:04 PM	#6
Rotary Related Good stuff at low prices Join Date: Oct 2010 Location: TX Posts: 52 Rep Power: 16	it's the 3.5mm for the small hoses. If you go to autozone they don't have metric hose usually, just fyi. __________________ Visit us at: www.rotaryrelated.com or find us on facebook

12-14-2010, 07:53 PM	#7
Max777 Pirate Join Date: Mar 2008 Location: Central IL Posts: 1,323 Rep Power: 19	Yeah, they have 5/16" rubber hose, and that size fits a bit loose, so you need to zip tie each connection. The 3.5mm silicone stuff works the best for cars IMO. __________________ Rotaries:They are NOT that complicated!

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