New Vacuum lines!

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New Vacuum lines! - 5/9/2008 9:52:14 PM    pg Posts: 894 Joined: 8/7/2006 Status: online After 34 years I changed all the vacuum lines under the hood, took only an hour, but an easy project! I can't believe the great results, the lights pop up together and go down together. I had tried cutting off about 1/2 inch where they connected and that made it better, but with the new lines everything works like new. PG. _____________________________ my Vettes birthday, May 1, 1974 Post #: 1

RE: New Vacuum lines! - 5/9/2008 10:27:36 PM    aldous Posts: 122 Joined: 1/5/2008 Status: offline Interesting... so the lights go together... I'll do soon a check at vacuum lines for leaks, above all for the influence on engine operation I suppose that more than a Corvette goes bad because of leakage at vacuum lines ( poor engine operation) the leakages are usually where the hoses connects, right? _____________________________ Aldo from south Italy 1979 L82 ,4 speed, edelbrock performer rpm intake, edelbrock 600cfm carb,double hump 64cc heads 2.02/1.6 valves, Hedman Hedders dual headers, Flowmaster 40 series, Goodyear Eagle GT+4 255/60/15 , 4 Bilstein HD shocks (in reply to pg) Post #: 2

RE: New Vacuum lines! - 5/10/2008 10:56:27 AM    73shark Posts: 901 Joined: 4/18/2006 Status: offline quote: ORIGINAL: aldous the leakages are usually where the hoses connects, right? Or any place where they are near heat like near the engine because they become brittle and develop fine cracks.  Sometimes can break. _____________________________ So many toys, so little time (in reply to aldous) Post #: 3

RE: New Vacuum lines! - 5/11/2008 8:34:46 AM    Rich G.   Posts: 84 Joined: 1/12/2007 Status: offline Who's hose kit did you buy? I keep reading that some brands aren't right. (in reply to 73shark) Post #: 4

RE: New Vacuum lines! - 5/11/2008 3:08:02 PM    pg Posts: 894 Joined: 8/7/2006 Status: online Hi rich G, I got them from www.riksvet.com and I used this free vacuum guide http://www.corvette-101.com/vacuum.htm PG. _____________________________ my Vettes birthday, May 1, 1974 (in reply to Rich G.) Post #: 5

RE: New Vacuum lines! - 5/11/2008 4:36:43 PM    SCHOON Posts: 253 Joined: 9/8/2006 Status: offline PG, Question for you. When I pull my headlight switch out the lights go on but the doors do not open. I have been using the pull down switch to open the doors. Looks like a bear to get at the switch. I am hoping that's not the problem. Schoon (in reply to pg) Post #: 6

RE: New Vacuum lines! - 5/11/2008 5:22:23 PM    pg Posts: 894 Joined: 8/7/2006 Status: online Hi SCHOON, this is the way I think it works. When the head light switch is pushed in (off position) vacuum can pass thru the two ports on the side of the switch. When you pull the head light switch all the way out (head lights on) the vacuum is blocked, that makes the head lights go up. When you pull down on the "Override" switch, that also blocks the vacuum and makes the head lights go up. Vacuum: starts at the intake manifold then goes thru the filter then goes thru the check valve then goes thru the head light switch then goes thru the pull down switch and ends up thru a "T" at the top port of each relay. So my guess is that the vacuum part of the head light switch is not stopping the vacuum. PG. _____________________________ my Vettes birthday, May 1, 1974 (in reply to SCHOON) Post #: 7

RE: New Vacuum lines! - 5/12/2008 2:50:35 AM    Texas Jim   Posts: 341 Joined: 12/15/2005 Status: offline I found first-hand that if you have a vacuum problem / the headlights, that when the switch is pulled f/ the headlights to be on, the vacuum leak isn't isolated to the headlight system, but causes a vacuum leak in the running of the engine and the car runs like crap w/ the lights pulled due to the leak, like any vacuum leak would cause in the running of the engine.  So, don't put-off fixing your vacuum leak in the headlight system, as your 'Vette will run terrible in the dark- not due to a ghost. (in reply to pg) Post #: 8

RE: New Vacuum lines! - 5/12/2008 6:33:11 AM    aldous Posts: 122 Joined: 1/5/2008 Status: offline I'm pretty sure that the vacuum lines on my car are OK, otherwise my engine would run poor... but one of these days I'll try to remove all the "services" from the manifold vacuum and see if the engine runs better. If so , a leakage have to be somewhere... Actually my heating system doesn't work. I don't have air flowing in the cockpit even if the fan runs... _____________________________ Aldo from south Italy 1979 L82 ,4 speed, edelbrock performer rpm intake, edelbrock 600cfm carb,double hump 64cc heads 2.02/1.6 valves, Hedman Hedders dual headers, Flowmaster 40 series, Goodyear Eagle GT+4 255/60/15 , 4 Bilstein HD shocks (in reply to Texas Jim) Post #: 9

RE: New Vacuum lines! - 5/12/2008 1:20:09 PM    SCHOON Posts: 253 Joined: 9/8/2006 Status: offline So I will replace all my vacuum lines in the engine compatment and see if my car runs better. But how do I do I replace the vacuum lins to the headlight switch. PG, Just ordered the vacuum hose kit from the place you recomended. < Message edited by SCHOON -- 5/12/2008 2:26:07 PM > (in reply to Texas Jim) Post #: 10

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