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...

 

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.

 

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?

 

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

 

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

 

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

 

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...

 

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

 

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

 

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

 

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

 

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

 

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

 

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

 

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

 

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.

 

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

 

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

thanks man...