Question on 1971 LT-1 Vacuum Line Connector Color?

[Paul C.]

Page 135 of the new NCRS 1970-1972 TIMJG states:

"On 1970-71 LT1s and LS6s use a plastic opaque gray four-port connector to join vacuum lines routed to the diverter valve, choke pull-off, TCS or CEC solemoid, and carburetor. (See figure M15.16. On1972 LT1's this fitting was opaque white"

My 1971 LT1 has a white 4 port connector. I have never seen a gray one. None of the corvette part suppliers show a grey one. I assume this information is correct so does anyone know where I might obtain a grey one?

Thank you for your help.

[Robert G.]

Re: Question on 1971 LT-1 Vacuum Line Connector Color?

I believe my 71 Lt-1 is white/opaque not gray

[Paul C.]

Re: Question on 1971 LT-1 Vacuum Line Connector Color?

I agree that all the LT1's I have seen have white ones but the TIMJG says it should be grey, I'm hoping other 71 LT1 owners will weigh in on this. Does anyone have one with grey and I was hoping someone who wrote the TIMJG would respond and let us know what is correct? Maybe our cars are incorrect???

[Mike E.]

Re: Question on 1971 LT-1 Vacuum Line Connector Color?

My gray one became opaque white/cream colored when I soaked it and carefully cleaned the inside. Initial appearance is gray.

[Mike E.]

Re: Question on 1971 LT-1 Vacuum Line Connector Color?

I can't edit my thread above, so I will add a new one. I was on the team for the new 70-72 JG, and I don't know that we ever carefully addressed the color. They look gray on the car if it has any miles on it, because of the deposits on the inside. Attached is a picture--best guess is about 1 1/2" wide, 1" tall. I would go down to the shop and measure, but just drove 3 hours in the 6"+ of snow, and just plain don't feel like doing that!
Here is a picture of the uncleaned one.

[Gary B.]

Re: Question on 1971 LT-1 Vacuum Line Connector Color?

Picture please?

Some, most of the aftermarket "white" 4-port fittings do not have the right configuration. They are a solid white, not opaque white or as the threads below say, gray before they are cleaned.

Gary Bosselman

[Gary B.]

Re: Question on 1971 LT-1 Vacuum Line Connector Color?

I have marked up my copy of the 6th Edition TIM&JG. Sorry for the error.

Picture below is 4-NOS ones I bought at Carlisle a few years ago. As you can see they run from a cream color to a more white color? I probably call it opaque-cream in the manual.

Gary Bosselman

[Ron G.]

Re: Question on 1971 LT-1 Vacuum Line Connector Color?

Paul, you asked that all 1971 LT-1 owners would weigh in on this post regarding the white 4 post fitting connector to the vacuum lines. After looking at mine last night it seems that I still retain the original 4 port vacuum fitting connector that was installed when it left the factory. My car has a biuld date of December 19th 1970. The last four of the Vin are 4504. it is definitely an off-white opaque with 4 ports. - Ron

[Paul C.]

Re: Question on 1971 LT-1 Vacuum Line Connector Color?

Do all the original connectors have the 9R-470 numbers on them? I'm sure mine is a replacement and has no numbers of it. Glad I could starighten this out for any future LT-1 owners. My car was built in January 1971. Thanks to all who replied and took the time to look at their car--it is greatly appreciated.
Paul

[Mike E.]

Re: Question on 1971 LT-1 Vacuum Line Connector Color?

FWIW, in the shadow of the left-hand upright is a 1. So the molded-in number is 19R-470.

[Paul C.]

Re: Question on 1971 LT-1 Vacuum Line Connector Color?

I wondered if there was a faint 1 because the only original part I could find was 19R-470. Didn't think the GM engineers would make 2 different pieces of plastic for the same engine in 1970 & 1971. Thanks.

[Mike E.]

Re: Question on 1971 LT-1 Vacuum Line Connector Color?

In defense of our gray mistake. Here is a piece I just took off an unmolested car. The hoses are the ribbed originals. The pictures show from as-removed to cleaned in an ultrasonic cleaner and run through with some of my wife's cotton swabs with most of the cotton removed. On bowtie cars they appear gray because the car has not been disassembled for cleaning, but when cleaned, they are as described in above posts.