As some of you know i had the vacuum T connector under my supercharger snout break and i ghetto fixed it with some superglue and electrical tape...Held up for a week to get me by while i priced parts,searched online and such.Well it broke again so it was time to fix it the right way.
Stock Vac line for the line running from the map sensor to T under the snout,to the next T and then to the BBV has a Inside diameter of .075 in,which is 1.905 mm or 1/16th a inch.Some of you may be able to find this but i could not other then the dealership and they wanted to sell me this kit for 54 bucks plus tax and it only covered this system.The closest dealership that would ONLY sell me the Vac T for under the snout was over a hour away and wanted 18.76 plus tax for it.So i decided screw those prices i will do my own DIY fix.
The nipple for under the Supercharger on the shaft is a Outside diameter of roughly 6 mm or 1/4th a inch and the other Tee in this system the Nipple it connects to the shaft has a outside diameter of roughly 4 mm or 5/32s(These numbers are rounded to the closest even number on the tight side and are very close or are actual size). Now some stores do sell a 2mm inside diameter line but not many carry it stock.There is also 3 mm or 1/8th line but finding T connectors that go from 3 mm or 1/8th to 6 mm or 1/4th is not the easiest either.
I will give a list of the parts i bought with part numbers and line there on these parts were bought at O'Reillys auto part store.
Gates Vacuum hose- 4 mm inside diameter -Part number 27042 -Line GAT - Price .49 cents a foot - Bought 5 foot.
Gates Vacuum hose- 6 mm inside diameter -Part number 27043 -Line GAT - Price .59 cents a foot - Bought 1 foot.
(This hose is very thick walled it is kink and puncture resistant and is good up to 25 PSI and -40 degrees to +257 degrees.)
Dorman Auto Grade T connectors - Part Number 47326 - Line MTM - Price 3.19 comes with 2 connectors in the pack which are 1/8th by 1/8th by 3/16th.
Dorman Auto Grade T assorted connectors - Part Number 47328 - Line MTM- Price 4.99 comes with many different size connectors.
Total price for everything was 11.98 with tax.
Here is a pic to show the parts.
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So once i got home i first started by taking off the line from the Map sensor (Back of engine on a metal bracket over the rear valve cover) and cut a new piece of the 4 mm or 5/32nd line the same length.The 4 mm line is very tight to fit onto the nipple back there but it will fit,i did it and this Vac line will not rip its good stuff.Once i got it on the nipple for the Map sensor i routed it over to the nipple under the supercharger snout.
Too make my new T connector for under the supercharger snout i first cut a small piece (Long enough so the Lower intake manifold nipple fits in and the new T fits in) of the 6 mm or 1/4h inch line and put it onto a T connector i found in the assorted pack,this T connector is 1/8th by 1/8th by 1/4.I put the 6 mm line onto the 1/4th side of the T connector then slide the other end of the hose onto the lower intake manifold nipple.Again fittings are nice and tight but they do fit i did it with no issues.I then attached the line 4 mm line i ran from the Map sensor to left 1/8th connector side.Here is the pic to give u the idea of how it looks with the small piece i cut to put on the one end to slide onto the nipple.
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Next i took the other line that connected to the T under the supercharger snout to the T up above (Not sure what part this connects to)measured a piece of 4 mm line to same length as that line and connected it to the right 1/8th connector on the new T i made for under the snout and then routed it up to where the higher T is.I then removed the old higher up T and made a new Tee for this nipple just like i did for the one under the snout.I cut a small piece of 4 mm line (Long enough to fit the nipple and a T connector end into it)and then stuck it onto the upper nipple.Using a 1/8th by 1/8th by 3/16 T connector out of the 2 pack i bought i pushed the 3/16th side into the other end of the hose on the nipple.(Again tight fit but it does fit no issues). I then connected the 4mm line from the T from under the snout to one of the 1/8th inch connections on the T.
Next i removed the last piece of hose running from this T over to the BBV and cut a new piece out of the 4 mm line the same length.Not needing any T connectors here i pushed the 4 mm hose onto the other 1/8th inch connection on the upper T and ran it over (routing it nicely) and connected it to the BBVs nipple.Again tight fits but the hose goes on no problems.
Bam i just fixed my broken V tee under the snout plus i replaced all the lines on this part of the vac system and other T connector with brand new lines and T connectors insuring no cracks,punctures or anything in this part of my cars vacuum system for cheaper then the dealership wants just for the one T connector for under the supercharger snout.
I wrote this DIY up for everyone on here because i had the hardest time figuring out what size lines i needed or what connectors i needed,and having to figure out conversions from MMs to inches and such.Nobody on this site knew what sizes were needed they have done this fix too but did not remember what sizes lines or connectors were needed.I figure someone on this site will run into the same problem and not want to spend almost 20 bucks for just a factory vacuum T connector,or 50+ dollars for this vacuum system kit from the dealer or 20 bucks from ZZP for there vacuum system kit they offer.Again i did this fix for 11.98 and the connections are air tight due to how i made my part list so things were super tight fits.Below are pics of old lines,New hose,The packages of the Vacuum Ts and a few pictures of how i made the Vacuum T connections fit onto the nipples.
Now prices can and will be different from store to store,you can buy plastic T connections,Metal or Brass T Connectors,you can buy thin wall hose or silicon hose and all these things will very in prices but now everyone has correct sizes needed or you can just goto O'Reillys and have Part numbers needed and know the exact price!
This job took honestly 20 minutes if that,what takes the most time is cutting the lines to match other then that its just pushing things together!
I now know that i had some slight vacuum leaks here in this system due to stress fractures (cracks) in the other T out of round holes on all the T connectors and such..Car runs great it actually runs better then before i broke the vacuum T in the first place...Which again makes me realize i had a few small leaks in the old system.
Edited by CrazyCraigGSE, 22 July 2012 - 05:15 AM.