Plugging vacuum ports

I am tired of replacing ****ty vacuum caps on my intake manifold after installing the Holley carb, they are cracking again and it is idling like **** again. So whats the best method for plugging them, pull the tubes and tap for screws or fill the holes with filler putty?

I well get replacement caps for the next few weeks and hopefully over spring break I can pull the intake and fix the adapter plates and plug the holes and hopefully get my performance cam installed as well

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Stock block and head, bored 0.040 over with a shaved deck. Holley 5200, Pacesetter header, 2" exhaust, Accel coil and 8.2mm wires, mechanical rocker arms, Probe crank pulley, electric fan and too much compression for its own good. '85 RX7 GSL LSD, lightened flywheel, Miata transmission and dual exhaust soon

Permanant fix is cut them off and braze them up. If you want to leave them open, I use small lengths of vacuum hose with a bolt in the end.

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90' B2600i, FI, 5 speed, 4x4. engine stock. 3" body lift. 2" suspension lift. Electric fan. 130 amp Alt. 33x12.50x15 on 10" rims. http://photobucket.com/bulrid8
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I have also found the AutoZone/Checker-O-Reilly vacuum caps to crack, and after a relatively short time, can't blame the Arizona heat alone for that. I went back to using short pieces of vacuum line and golf tees. Some have suggested better quality vacuum caps can be obtained at Vacuum Caps and Plugs - SummitRacing.com but I haven't tried any of those. I also haven't tried anything from NAPA or CarQuest for these, maybe something in a drawer rather than a shelf bubble pack.

Since the rubber vacuum hose holds up well, I think rubber vacuum caps might be better than plastic.

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http://www.cardomain.com/ride/2334519/1

mr gasket plugs are garbo. ive had napa plugs on mine 4 a long time and they havent cracked yet

Got a NAPA part number for those?

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http://www.cardomain.com/ride/2334519/1

you know ive had the same problem done replaced mine 3 times and its not that hot in tenn

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2600 air lifts on all 4s reverse 4 link bags on bars every thing shaved chrome caddy wheels caddy tail lights and some crazy tube work

no, but that intake sure gets hot! It gets in the neighborhood of 195-200 degrees. (depending on your thermostat temp)

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BriankMizell's Stereo Build

I have/had the same problem, I started replacing the caps as the go with new vac tube and plugging them with screws. That seems to work the best.

I tried some caps from RadioShack once and they did last longer than the ones from Autozone. I got them on sale a few years back (not sure if it was one of those sales of "we are not going to carry it anymore" thought).

FuzzyH

When I do mine I'm gone get solid dowel pins. drill out the holes and heat them up on the intake. take the dowel pins and stick them in the freezer. when I get the holes heated up a bit and stick the cold dowel pins in the hot intake will shrink and the cold dowel pins will swell. closing up the hole for good I hope anyway lol.

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i have no idea on the part number. they just had them in a lil organizer thing but that was before they remodeled our napa n got new owners. but idk y they would b different. but that cold plug idea sounds like id work

easy, 2 dollar fix. Self taping bolts, take em back out, cut em short and put em back in. A little lock tite and paint and it'll look factory

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Past Projects:
1980 Caprice Classic "Goliath the Pimpmobile"
1989 Mazda B2200 LX Extended Cab "Rarity" Archive Pics

Current Projects:
1986 Mazda B2000 Diesel "Project Redemption" Build Thread
1995 Honda Civic "Maggie" Getting a MS1/MS2 conversion after diesel completedFun Videos**My Civic Pics (link fixed)

Make sure you vacuum the filings out of the vacuum port from the self tapping screws. That will go into the cylinders when it's started!

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1955 Chevy 2D HDTP / 1957 Nash Metropolitan
1966 Pontiac GTO Conv & HDTP / 1967 GMC SWB Pickup
1968 Pontiac Firebird / 1969 Pontiac GTO Conv.
1979 Pontiac Firebird / 1991 Mazda B2600i (and a few more B's )
2002 Chevy Silverado 2500HD Crew Cab

lol, I did mine with the intake off. Put it on when I put the holley on

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Past Projects:
1980 Caprice Classic "Goliath the Pimpmobile"
1989 Mazda B2200 LX Extended Cab "Rarity" Archive Pics

Current Projects:
1986 Mazda B2000 Diesel "Project Redemption" Build Thread
1995 Honda Civic "Maggie" Getting a MS1/MS2 conversion after diesel completedFun Videos**My Civic Pics (link fixed)

Yeah, whatever I do it well be when I have the intake off in a couple of weeks to fix the adapter plates ect and install the new cam

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Stock block and head, bored 0.040 over with a shaved deck. Holley 5200, Pacesetter header, 2" exhaust, Accel coil and 8.2mm wires, mechanical rocker arms, Probe crank pulley, electric fan and too much compression for its own good. '85 RX7 GSL LSD, lightened flywheel, Miata transmission and dual exhaust soon

Well I think I am going to go and take some taps and tap out the holes and thread in some bolts, probably 5 or 6mm.

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Stock block and head, bored 0.040 over with a shaved deck. Holley 5200, Pacesetter header, 2" exhaust, Accel coil and 8.2mm wires, mechanical rocker arms, Probe crank pulley, electric fan and too much compression for its own good. '85 RX7 GSL LSD, lightened flywheel, Miata transmission and dual exhaust soon