1973 vaccum hose grommet source

[Roger C.]

Hello all
according to the 1973 aim the firewall hole diameter for the 3 hole vaccum hose grommet is 1-5/8"
I purchased what I thought was going to be the correct diameter from three different vendors
They all are for an 1-1/4 in diameter. Those grommets just fall through the hole.
Is there a souce for the larger grommet, and where would the smaller diameter grommet be used?
Just curious who else has run across this.
Roger

[Alan S.]

Re: 1973 vaccum hose grommet source

Hi Roger,
Is this the grommet you're asking about?
The over-all diameter is 1 1/2" inches.
I have an extra you may have. I'm not sure here it came from. Maybe Smart Parts at Carlisle.
Regards,
Alan

[Roger C.]

Re: 1973 vaccum hose grommet source

Alan,
It is going to require something around 1 7/8"
the one you picture and describe as 1 1/2" is the diameter is the same of the three I purchased from other vendors

Thank you for your offer

I have learned not to throw any thing away on these cars until you know for sure the replacement is going to work

I will look in my bone pile and hope to find the old one

Roger

[Joe L.]

Re: 1973 vaccum hose grommet source

Alan,
It is going to require something around 1 7/8"
the one you picture and describe as 1 1/2" is the diameter is the same of the three I purchased from other vendors

Thank you for your offer

I have learned not to throw any thing away on these cars until you know for sure the replacement is going to work

I will look in my bone pile and hope to find the old one

Roger

Roger------


Is yours a THREE HOLE grommet? I thought that 1973 and later used a TWO hole grommet. In any event, if it is a three hole grommet then 1973 must have changed from earlier. The earlier grommet, GM #3934269, is 1-1/2" OD as measured at the forward edge of the grommet.

[Roger C.]

Re: 1973 vaccum hose grommet source

Joe,

This has been a ten year basket case body off restoration.

I do not know what was original, but I will check on the two hole angle.

Thank you
Roger

[Roger C.]

Re: 1973 vaccum hose grommet source

Joe,
Mystery solved
It is a two hole grommet
I found it in a box I set back
Thank you for the clue

Roger

[Joe L.]

Re: 1973 vaccum hose grommet source

Joe,
Mystery solved
It is a two hole grommet
I found it in a box I set back
Thank you for the clue

Roger

Roger------


I believe this grommet was supplied to PRODUCTION as part of the vacuum harness assembly. Also, I cannot find where it was ever available in SERVICE separately. So, I have no GM part number for it. I do not know if it's reproduced.