• The Roadster Factory Recovery Fund - Friends, as you may have heard, The Roadster Factory, a respected British Car Parts business in PA, suffered a total loss in a fire on Christmas Day. Read about it, discuss or ask questions >> HERE. The Triumph Register of America is sponsoring a fund raiser to help TRF get back on their feet. If you can help, vist >> their GoFundMe page.
  • Hey there Guest!
    If you enjoy BCF and find our forum a useful resource, if you appreciate not having ads pop up all over the place and you want to ensure we can stay online - Please consider supporting with an "optional" low-cost annual subscription.
    **Upgrade Now**
    (PS: Subscribers don't see this UGLY banner)
Tips
Tips

Plugs for Air Injector rail

Share this page

B

Bassfishman

Freshman Member
Offline
Plugs for Air Injector rail

I purchased some Allen head plugs for my MGB. I was reading over smog removal instructions I have obtained from someone on a PDF document and found this statement:
"Remove the Air Injectors and replace them with 7/16"-20 fine threaded bolts 3/4" in length. Do not be tempted to use Allen head plugs because they will have to be bottomed out into the head, projecting into and thus creating an obstruction to air flow in the exhaust ports. "

should I toss the allen head plugs and use bolts? I see so many MGB with the allen head plugs. /ubbthreads/images/graemlins/confused.gif
 
Nunyas

Nunyas

Yoda
Country flag
Offline
Re: Plugs for Air Injector rail

I dunno about that. I reckon if you use hi-temp loctite on them and don't screw them in as far as the PDF says you 'have to' you'll be ok and won't disrupt the exhaust port flow.

Lots of people use allen head screws to plug their air pump injection holes. So, i can't imagine it being all _that_ bad if done right.
 
Scott_Hower

Scott_Hower

Luke Skywalker
Offline
Re: Plugs for Air Injector rail

[ QUOTE ]
Do not be tempted to use Allen head plugs because they will have to be bottomed out into the head, projecting into and thus creating an obstruction to air flow in the exhaust ports. "


[/ QUOTE ]

I call BS on that. Have a look at the plug, most are concave at the bottom. There's no part that fits below the plane of the orifice. I seriosly doubt you could detect any gasflow differences between bolts and allen head plugs.
 
DrEntropy

DrEntropy

Great Pumpkin
Platinum
Country flag
Offline
Re: Plugs for Air Injector rail

Yay Scott! BS fer sure: There are smaller diameter "tubes" projecting into the exhaust ports from the holes anyway! /ubbthreads/images/graemlins/thumbsup.gif
 
P

Phantomracer

Senior Member
Offline
Re: Plugs for Air Injector rail

I have never seen or heard of a single incident of a problem on any motor with those plugs. Sounds like a urban legend

Paul
 
G

Guest

Guest
Guest
Offline
Re: Plugs for Air Injector rail

Been using the allen head plugs for years without a problem.
 
T

twigworker

Jedi Trainee
Offline
Re: Plugs for Air Injector rail

The Allen screws are the neatest and more "official looking" way to go. You can also use brass pipe plugs, the ones with the square heads on them. The brass might be a little easier to get out should you have to remove them for some reason in the distant future. Jack
 
G

Guest

Guest
Guest
Offline
Re: Plugs for Air Injector rail

The problem in using pipeplugs is the thread is not correct. You can use 7/16" bolts. cut off, screwed in the holes and then piened over so that they just dissappear from sight. Takes a bit of work to do it right but when done properly there is no trace of the holes being plugged
 
C

ccougill

Jedi Warrior
Offline
Re: Plugs for Air Injector rail

Gerry, how long are the allen screws you are using?
 
tony barnhill

tony barnhill

Great Pumpkin - R.I.P
Offline
Re: Plugs for Air Injector rail

Gerry - you use Teflon tape or anything on them?
 
G

Guest

Guest
Guest
Offline
Re: Plugs for Air Injector rail

I just use a good neversieze. The oil in the neversieze will burn out leaving the solids behind, be they nickle, moly or copper. Loctite will not hold up when the metal gets close to 400 degrees
 
Similar threads
Thread starter Title Forum Replies Date
trglory TR2/3/3A TR3a spark plugs Triumph 1
K TR2/3/3A Heavily carboned spark plugs in relation to a failed FO8 gasket? Triumph 12
bighealeysource Leaking Overdrive and Gearbox Drain Plugs Austin Healey 19
L T-Series Spark plugs again ? MG 2
B TR6 Gas on spark plugs Triumph 7
S TR2/3/3A Aluminum oil gallery plugs Triumph 9
kodpkd Spark Plugs Austin Healey 3
L TR4/4A spark plugs Triumph 9
A MGB Welsh plugs MG 9
HighAltitudeTR3 T-Series Why are there nuts in my core plugs?! MG 8
M For Sale NOS Champon NA-10 Spark Plugs Jaguar Classifieds 2
Gliderman8 TR6 Spark plugs for TR6 Triumph 7
B TR4/4A Spark plugs Triumph 1
B Resistor type vs non-resistor type spark plugs for 100-6 Austin Healey 17
S Spark Plugs Spridgets 2
AUSMHLY BJ8 NGK Spark Plugs Austin Healey 13
AUSMHLY When to replace spark plugs Austin Healey 1
K TR2/3/3A Anyone running NGK spark plugs? Triumph 26
longbridgehealey NGK plugs Austin Healey 23
S TR2/3/3A little rubber plugs Triumph 3
S TR2/3/3A Overdrive drain plugs leaks Triumph 3
A Oil Galley Plugs Spridgets 0
M TR2/3/3A Crankshaft Oil Galley Plugs Triumph 7
tahoe healey Spark Plugs Austin Healey 20
I Weeping Core Plugs Austin Healey 6
G spark plugs Austin Healey 10
R General Tech Aluminum oil gallery plugs Triumph 3
S TR4/4A 1/2" blanking plugs Triumph 2
I Tips for installing intake manifold plugs in a stock Bugeye? Spridgets 6
vickxxx T-Series 1952 MGTD spark plugs. MG 4
Tim Tucker TR4/4A Reading my TR4's plugs [L-87YC] Triumph 8
KVH TR4/4A Stumped Again on Carbs Fouling Plugs Triumph 16
Marvin Gruber Auto Zone $15 freeze plugs Austin Healey 3
Got_All_4 General Tech How do i get these out? Tranny cover plugs Triumph 6
KVH General Tech Carbs flooding and Plugs Fouling Triumph 9
M Can you identify these plugs? Spridgets 18
Simon TR4a TR4/4A Spark plugs, what do you use? Triumph 4
gbtr6 TR6 What spark Plugs do you use? Triumph 1
GTP1960 TR2/3/3A Resistor plugs vs. non-resistor plugs? Triumph 6
F Brass freeze plugs BJ8 Austin Healey 4
T TR6 Black sooty plugs continue - What now? Triumph 29
GTP1960 TR2/3/3A Rough running / a lot of carbon on the plugs Triumph 11
M Stag Wiring plugs for gear lever knob overdrive switch. Triumph 1
S MGB 1969 MGB No spark to plugs MG 5
R Spark plugs for 61, BT7 Austin Healey 2
M TR4/4A Spark plugs. Triumph 1
sundown TR6 1973 TR6 plugs Triumph 4
trglory TR6 Exhaust manifold plugs Triumph 4
T TR4/4A What gap on Champion L-87YC spark plugs? Triumph 3
CJD TR2/3/3A Oil plugs Triumph 17

Similar threads

Top