IHADAV8.com - Turbo Buick Tech, and Nonsense

Tech Area => General Buick Tech => Topic started by: Shimy87 on September 18 2013, 02:23:48 PM

Title: vacuum block
Post by: Shimy87 on September 18 2013, 02:23:48 PM

During my latest problem solving session I discovered another potential issue. It appears I have a slight leak in or around the vacuum block? I cant see any obvious issue but if I hold my hand over it the slight hissing I hear is muffled. It appears that the plastic block may have a slight bow in it??? Maybe its leaking at the seal to the TB because of this. Anyone run into this before?

Title: Re: vacuum block
Post by: phil_long on September 18 2013, 03:38:34 PM

the piece sitting under vacuum block is cracked... :O im still scooting around, although that will be my next investment

Title: Re: vacuum block
Post by: Shimy87 on September 18 2013, 03:43:45 PM

the gasket??

Title: Re: vacuum block
Post by: Steve Wood on September 18 2013, 04:46:48 PM

sounds like the gasket to me...

is it snugged down properly?

Spray a little carb cleaner around it and see if the idle changes.

Take it off, put a thin smear of rtv on the base, clean off the top of the plenum, wait 20 minutes, and then bolt it down

Title: Re: vacuum block
Post by: Shimy87 on September 18 2013, 04:56:09 PM

Thanks, i'll give it a try  :cheers:

Title: Re: vacuum block
Post by: earlbrown on September 18 2013, 08:32:27 PM

Years ago I chased that link and couldn't get it to seal to save my life.  I finally got an alum block and solved the problem.

Title: Re: vacuum block
Post by: Shimy87 on September 19 2013, 05:03:52 PM

I saw those but hope I dont have to spend the $40

Title: Re: vacuum block
Post by: Shimy87 on September 19 2013, 08:00:19 PM

Well $40 spent, was going to replace the little hose pieces when I did this and of course the frickin plastic nipple broke off on the end one  :013: :013: :013: 
 
Its how it always goes with this dam car!

Title: Re: vacuum block
Post by: earlbrown on September 20 2013, 01:07:13 PM

I didn't want to spend the money either...    The car kinda insisted!



On the upside that's a part that is a permanent fix.