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Forum Rules (Click Here) -> Ontario Rodders -> Tech -> The Vacuum gauge:
Post Info TOPIC: The Vacuum gauge:
sasquatch


NORTH BAY, ONT

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The Vacuum gauge:
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Just for the heck of it here is what a vacuum gauge will tell you.

Exhaust or intake valve sticking.

Sparkplug misfiring.

Burned exhaust or intake valve.

Piston rings or cylinder walls worn.

Ignition timing off.

Valve timing off.

Valve timing off due to worn camshaft lobe or timing gear.

Intake gasket , carb gasket or PCV hose leaking.

Sparkplug or breaker point gap out of adjustment, damaged plug or high tension cable.

carb out of tune.

Exhaust system restriction.

Head gasket leaking.

Valve guides worn.

All that from suction engine pulses. A vacuum gauge is the first thing to hook up to a problem engine.



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scott420p


BRAMPTON, ONT

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I just found this as I'm intrigued by this vacuum gauge and mechanical ways to fix things. http://www.secondchancegarage.com/public/186.cfm 

There are 15 different readings on this page along with the meanings. Hope this helps.



-- Edited by scott420p on Tuesday 6th of August 2013 08:56:34 PM

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parklane


St THOMAS, ONT

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Yes, I've heard that. Now can somebody tell/show/discribe how to tell what the problem is??



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sasquatch


NORTH BAY, ONT

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If you mean what tells what, a good vacuum gauge will come with a sheet showing what the different needle fluctuations mean, and describe the needle action.

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sasquatch


NORTH BAY, ONT

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Great posting Scott, thanks for finding this, hope this helps people, the price for a decent vacuum gauge is little compared to what it will tell you.

Amazing what different engine pulses will tell you once you understand what the needle's reactions are.

"Old School Rule" , first thing you reach for is the vacuum gauge.

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hemi43


ONTARIO

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If you buy a vacuum gauge from Canadian Tire it will read 10" of vacuum right in the box until you get it home, because Canadian tire sucks!!

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Fordy Acres Car Farm


DORCHESTER, ONT

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scott420p wrote:

I just found this as I'm intrigued by this vacuum gauge and mechanical ways to fix things. http://www.secondchancegarage.com/public/186.cfm 

There are 15 different readings on this page along with the meanings. Hope this helps.



-- Edited by scott420p on Tuesday 6th of August 2013 08:56:34 PM

 Thanks Scott! I've bookmarked this site for future reference!!!



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58Chev


ETOBICOKE, ONT

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Very interesting and informative. Now for those of us who have not seen a vacuum gauge, what would be a decent one to purchase?

Pictures would help..  



-- Edited by 58Chev on Wednesday 7th of August 2013 06:38:01 AM

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flatblack55delivery


PORT HOPE, ONT

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Really really interesting,thankyou. Ed

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sasquatch


NORTH BAY, ONT

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The gauge i bought years ago i bought from a jobber, and it just says "Hastings", but i doubt if Hastings made it. (Hastings were noted for Piston rings)
Any good jobber like Nappa or others should have a decent gauge. It will come with an explanatory sheet showing what the different needle reactions mean.
And as stated in Scott's posting almost all that i have seen over the years will also show fuel pump pressure.

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Rochie


LONDON, ONT

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WAAAYYYY back when I was a green apprentice, my boss said "when the tool guy comes around buy a Vacuum guage from him and learn how to use it>" I did and I still have that same guage! Saved my butt a few times.

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parklane


St THOMAS, ONT

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Thanks Scott. I've had one for years, that I use to check fuel pressure, and for timing, but never had a explanation of all the other things.



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scott420p


BRAMPTON, ONT

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No problem anything to help. Now I just have to get myself a vacuum gauge and figure it out lol.

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