Can I use a vacuum gauge?

Bad89stang · 12-07-2002, 07:45 PM

Can I use a vacuum gauge to check for an intake manifold leak with the engine turned off?

82 GT · 12-07-2002, 10:31 PM

LOL............ You're kidding..........right?

Bad89stang · 12-07-2002, 10:55 PM

Yea I like to get on here and post up questions that I already know the answer to so that people can make fun of me. Thanks for the help.

Anyways, I am having trouble getting my Edelbrock Performer 5.0 to seal at the ends. It has a large gap between the manifold and the block. I am trying to figure out if I fixed it or not. The gap is much larger than normal and RTV won't do the job. Can I send it to a machine shop and get it decked or something. 82GT don't even bother sending a reply... I have blocked your worthless input. Why don't you post up some more info on how to steal money out of a vending machine? That's where you are really useful.

fiveohpatrol · 12-07-2002, 11:24 PM

You will have zero vacuum with the engine off.

Sounds like you need to take your lower manifold to a machineshop and have them mill it some. What I would do is, clean everything really well, leave it dry (no RTV), put the lower intake on and torque it properly. Then take a set of feeler gages and measure the gap between the block and the intake. Tell the machineshop what the gap is, and if they have anyone there that knows anything about geometry, then they can figure out how much to mill off.

Hope this helps, good luck

-drew

Bad89stang · 12-07-2002, 11:29 PM

That is exactly what I needed to know. I thought there was a gauge where you can apply vacuum and see if it holds, but I guess that applies to something else. I will take it to a machine shop and get it fixed. Thanks for the help.

fiveohpatrol · 12-07-2002, 11:46 PM

you may be thinking of a cooling system pressure gage. This is a very useful tool when trying to find coolant leaks. You pressurize the system to normal operating pressure (16psi for our cars) and then if you have a leak, you will be able to hear it, and feel for it without being burnt from hot engine parts, or getting a finger ripped of in the belt

glad I was of some help

-drew

Bad89stang · 12-08-2002, 01:39 AM

This is a private message that 82GT sent me so that nobody else could see it.

vacuum gauge
"If you don't want people to make fun of you then don't post stupid *** questions like that!!
Can you use a vacuum gauge with the engine turned off?
Honestly, does that make any sense to you?
Actually, I didn't know if you were kidding or not because sometimes people like to joke around like that.
Somebody once asked "How come my rear tires keep going bald?
He was just joking...we had a few laughs and moved on.
You, on the other hand, had to get anal about it though and cry.
BTW, the remark you made toward me about ripping off vending machines, I'm not even going to attempt to explain my reasoning behind posting that thread to you because you wouldn't understand since you don't know how to work a vacuum gauge!!"

Sorry 82GT, but some of us are trying to learn a few things on here. No, I have never used a vacuum guage. We are very proud for you that you have mastered the delicate art. This actually shows YOUR ignorance.

PKRWUD · 12-08-2002, 01:49 AM

hey, in all fairness, i just read this thread for the first time, and I knew what you were referring to from your last PM, and I still giggled. You have to understand, vacuum is only created when the engine is spinning. A problem that some people have is an internal vacuum leak at one of the intake ports. There is no way to check it, except with a vacuum gauge, and that's what it sounded like you were asking. BUT, in your defense, yes, you would be able to check it without the engine running. In fact, you have to disable the ignition to keep it from running when you do the test (for an internal vacuum leak).

What you are asking wouldn't work with a vacuum gauge because the vacuum is inside the manifold, not underneath it. What I don't understand is how there could be such a large gap.

Do what Drew suggested, and post the results. A solid bead of silicone should have worked fine.

Take care,
~Chris

Bad89stang · 12-08-2002, 01:56 AM

I tried what you said with the Ultra black, but it was not even close to sealing it. The bead was super thick as well. It just isn't going to seal without jerry rigging. I don't know if it was manufactured improperly or what. I will just put the stock one back on and get the Edelbrock check out after measuring the gap. Thanks everyone.

P.S. That does make sense about the vacuum... It would have to be measured from within the lifter galley and well, I know that isn't possible.

82 GT · 12-08-2002, 01:28 PM

Quote:

Originally posted by Bad89stang
This is a private message that 82GT sent me so that nobody else could see it.

Atleast I was decent enough to PM you and not waste eveyones time posting it here..........like you!!
Aren't you going to ask us what those numbers mean on that vacuum gauge that you don't know how to use?
Later on, maybe someone can tell you what else you can use a vacuum gauge for.
Did you figure out how to hook up the alternator you had problems with yet?

chuck88 · 12-08-2002, 02:10 PM

Just curious is this a new intake? Did you call edlebrock? I f so what did they say? If they were no help I would certainly not want to buy there products. Please let us know if you called edlebrock and if so what their reaction was.

Thanks

Chuck88GT

12-07-2002, 07:45 PM	#1
Bad89stang Registered Member Join Date: Aug 2001 Location: Ft. Worth, TX Posts: 456	Can I use a vacuum gauge? Can I use a vacuum gauge to check for an intake manifold leak with the engine turned off? Last edited by Bad89stang; 12-07-2002 at 08:37 PM..

12-07-2002, 10:31 PM	#2
82 GT Import Slayer Join Date: May 1999 Posts: 2,241	LOL............ You're kidding..........right? __________________ '82 GT 351W (.060)Comp Cams 274* Extreme Energy cam, ported & polished heads w/ 1.94/1.60 valves 10.3:1 flat top pistons,stealth intake, Mallory dizzy,Holley 750dp carb, BBK shorties,Flowmaster exhaust,C-4 with 3700 stall converter, B&M pro shifter,8.8 rear, 4:10's, subframes, electric fan, powermaster alternator, 4 core radiator.

12-07-2002, 10:55 PM	#3
Bad89stang Registered Member Join Date: Aug 2001 Location: Ft. Worth, TX Posts: 456	Thanks for the help... Yea I like to get on here and post up questions that I already know the answer to so that people can make fun of me. Thanks for the help. Anyways, I am having trouble getting my Edelbrock Performer 5.0 to seal at the ends. It has a large gap between the manifold and the block. I am trying to figure out if I fixed it or not. The gap is much larger than normal and RTV won't do the job. Can I send it to a machine shop and get it decked or something. 82GT don't even bother sending a reply... I have blocked your worthless input. Why don't you post up some more info on how to steal money out of a vending machine? That's where you are really useful.

12-07-2002, 11:24 PM	#4
fiveohpatrol I'd rather be basketweaving Join Date: Feb 2000 Location: Indianapolis Posts: 2,551	You will have zero vacuum with the engine off. Sounds like you need to take your lower manifold to a machineshop and have them mill it some. What I would do is, clean everything really well, leave it dry (no RTV), put the lower intake on and torque it properly. Then take a set of feeler gages and measure the gap between the block and the intake. Tell the machineshop what the gap is, and if they have anyone there that knows anything about geometry, then they can figure out how much to mill off. Hope this helps, good luck -drew __________________ NMRA O/C 9516 NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft

12-07-2002, 11:29 PM	#5
Bad89stang Registered Member Join Date: Aug 2001 Location: Ft. Worth, TX Posts: 456	Thank you! That is exactly what I needed to know. I thought there was a gauge where you can apply vacuum and see if it holds, but I guess that applies to something else. I will take it to a machine shop and get it fixed. Thanks for the help.

12-07-2002, 11:46 PM	#6
fiveohpatrol I'd rather be basketweaving Join Date: Feb 2000 Location: Indianapolis Posts: 2,551	you may be thinking of a cooling system pressure gage. This is a very useful tool when trying to find coolant leaks. You pressurize the system to normal operating pressure (16psi for our cars) and then if you have a leak, you will be able to hear it, and feel for it without being burnt from hot engine parts, or getting a finger ripped of in the belt glad I was of some help -drew __________________ NMRA O/C 9516 NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft

12-08-2002, 01:39 AM	#7
Bad89stang Registered Member Join Date: Aug 2001 Location: Ft. Worth, TX Posts: 456	82GT This is a private message that 82GT sent me so that nobody else could see it. vacuum gauge "If you don't want people to make fun of you then don't post stupid *** questions like that!! Can you use a vacuum gauge with the engine turned off? Honestly, does that make any sense to you? Actually, I didn't know if you were kidding or not because sometimes people like to joke around like that. Somebody once asked "How come my rear tires keep going bald? He was just joking...we had a few laughs and moved on. You, on the other hand, had to get anal about it though and cry. BTW, the remark you made toward me about ripping off vending machines, I'm not even going to attempt to explain my reasoning behind posting that thread to you because you wouldn't understand since you don't know how to work a vacuum gauge!!" Sorry 82GT, but some of us are trying to learn a few things on here. No, I have never used a vacuum guage. We are very proud for you that you have mastered the delicate art. This actually shows YOUR ignorance.

12-08-2002, 01:49 AM	#8
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	hey, in all fairness, i just read this thread for the first time, and I knew what you were referring to from your last PM, and I still giggled. You have to understand, vacuum is only created when the engine is spinning. A problem that some people have is an internal vacuum leak at one of the intake ports. There is no way to check it, except with a vacuum gauge, and that's what it sounded like you were asking. BUT, in your defense, yes, you would be able to check it without the engine running. In fact, you have to disable the ignition to keep it from running when you do the test (for an internal vacuum leak). What you are asking wouldn't work with a vacuum gauge because the vacuum is inside the manifold, not underneath it. What I don't understand is how there could be such a large gap. Do what Drew suggested, and post the results. A solid bead of silicone should have worked fine. Take care, ~Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

12-08-2002, 01:56 AM	#9
Bad89stang Registered Member Join Date: Aug 2001 Location: Ft. Worth, TX Posts: 456	Silicone I tried what you said with the Ultra black, but it was not even close to sealing it. The bead was super thick as well. It just isn't going to seal without jerry rigging. I don't know if it was manufactured improperly or what. I will just put the stock one back on and get the Edelbrock check out after measuring the gap. Thanks everyone. P.S. That does make sense about the vacuum... It would have to be measured from within the lifter galley and well, I know that isn't possible.

12-08-2002, 02:10 PM	#11
chuck88 Registered Member Join Date: May 1999 Location: Wood Ridge NJ USA Posts: 341	Just curious is this a new intake? Did you call edlebrock? I f so what did they say? If they were no help I would certainly not want to buy there products. Please let us know if you called edlebrock and if so what their reaction was. Thanks Chuck88GT __________________ So what if its "midlife crisis". Wife, 2 kids, busy job, "fixer upper" house, and I still have time for the Mustang!!! I Love my kids!!!

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