cr-rex

iTrader: (114)

i went non-seq and now i have all these open nipples. what size caps do i need? i know theres the one that come on the uim but while looking for more, i lost that one so now i have nothing to compare with.

the caps i have seen come in 4-19mm or in fraction sizes like 3/8 and 1/4. just not sure what size i need...

GoodfellaFD3S

iTrader: (213)

Get the red high-temp ones from mcmaster, the ones pictured won't last more than a month in the furnace we call an engine bay.

cr-rex

iTrader: (114)

i know. i was just posting the picture for reference..

thats a good deal...
http://www.mcmaster.com/#push-on-caps/=hc8bxg

but what size do i need?

Erix7rew

iTrader: (7)

You dont need to cap off the 3 (jdm) 4 (usdm) nipple on the lower intake manifold that are inline. It's just a passage from the motor side to the turbo side

cr-rex

iTrader: (114)

what? i just need to know what size caps the nipples are...

GoodfellaFD3S

iTrader: (213)

Next time I'm at the shop I can look up the sizes we use for ya.

evot23

iTrader: (17)

you can also get at racerpartswholesale and pegasus racing...not always on their online catalog but you can call.

FYI this thread title is misleading lol...

YellowT2

iTrader: (1)

I haven't actually used them, but 9/64" is essentially the same size as 3.5mm vacuum tubing, so I'd try those

ZE Power MX6

iTrader: (157)

Good info, I might need some of these down the road.

ArmenMAxx

iTrader: (21)

9/64" doesnt seem to come in the high temp one.

RXtacy

iTrader: (7)

Just to make things easier for people.
http://www.mcmaster.com/#push-on-caps/=hcjedr

XLR8

iTrader: (52)

Mazdatrix outlines 3.5mm & 6mm lines. The same size caps will be desired.
http://www.mazdatrix.com/c-silhos.htm

For caps, there are many options out there.

Silicone
http://www.stockcap.com/prod_detail.asp?id=181&cat=17
http://www.hosetechniques.com/index....cPath=104_4_67

EPDM
http://www.stockcap.com/prod_detail.asp?id=182&cat=17

XLR8

iTrader: (52)

1/4 & 1/8 are close common sizes to 3.5mm & 6mm. You can get a little closer with the McMaster.

http://mdmetric.com/tech/cvtcht.htm

DaleClark

iTrader: (55)

Search, in my vacuum hose thread I have a lengthy post about vacuum caps. The EPDM caps from McMaster-Carr work fantastic and are reasonably priced.

In that thread I specified the sizes I used.

The silicone ones don't seem to be necessary and I prefer black vacuum caps.

Dale

YellowT2

iTrader: (1)

I read that thread and never saw you specify a size anywhere. The only reference to vacuum cap size I saw in that thread was from someone else who said:
"I purchased the 1/8" caps suggested by Dale from mcmaster and they are too tight, I would go a little bigger. They fit tight and I managed to split the ends on several occasions from over stretching."

The next size up is 9/64" (3.57mm), where the 1/8" are 3.18mm

Radial GT

iTrader: (16)

Remove nipples, drill, and tap plugs. Problem solved forever. That is what I did, I did have the engine out and apart though. But if you want to be damn sure you never have to work them again, that is my suggestion.

YellowT2

iTrader: (1)

To anyone using the McMaster-Carr "chemical resistant" caps:

9/64" work on the 4mm vacuum lines
.223" work on the 6mm lines

both give a nice snug fit, but no problems getting them on

cr-rex

iTrader: (114)

i just ordered the 1/4 and 1/8 sizes from hose techniques...

thanks man...