Ignition lock cyl replacment? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

SSC's76 · 01-06-2007, 08:41 PM

I hate some of these GM ignition lock cylinders! I'm changing out a 78 lock and the plastic relase is missing. This wouldent be a problem if it had the screw to release like the newer ones but it doesent. Any advise for getting this POS out besides drilling? Ive attempted to use a small pick to push whats left of the release but with no luck!

ChevyTech · 01-07-2007, 03:43 PM

It is possible you are not in the right spot.

Sometimes there is a bit of flash over the opening to release the cylinder. I have seen some that the hole is not visible, being totally covered with aluminum, so it is easy to reach down the wrong hole trying to release the cylinder.

Take your pick and push on the aluminum a little to the right of the hole you see and make sure the correct hole is not covered over.

Notice the slot – the white arrow that is not pointing to a screw.

If the photo does not show here is the site it is from:
http://buickperformance.com/tiltstee...lumnwobble.htm

SSC's76 · 01-07-2007, 07:57 PM

No unfortunately I had the correct spot. The first design lock cyl sucks and if the plastic release tab is gone it sucks worse! I did get it out but I had to do it the hard way by pulling the whole POS apart and chiseled the back of the lock out.

Agghh life sucks sometimes!

**Zoomad75** · 01-09-2007, 12:49 PM

I just had to do the rack in my 75 and it looked just like the pic above for lock cylinder removal. Just used a pick and fiddled with the clylinder and it popped right out. Part of the problem is that the part you are trying to push down to release the cylinder is not exactly flat. It's got a beveled edge, so trying to push mine down with a pick was tricky. It would have worked better for me to use a small flat screwdriver or I've used a stiff feeler gauge.

Sorry to hear you had a hard time with it.

01-06-2007, 08:41 PM	#1
SSC's76 No No Join Date: Jun 2005 Location: Pueblo Colorado Posts: 1,781	Ignition lock cyl replacment? I hate some of these GM ignition lock cylinders! I'm changing out a 78 lock and the plastic relase is missing. This wouldent be a problem if it had the screw to release like the newer ones but it doesent. Any advise for getting this POS out besides drilling? Ive attempted to use a small pick to push whats left of the release but with no luck! __________________ 1976 Custom Deluxe SWB Med FMB.3/4 Drop. Gen VI 454, Muncie HD 3 speed With Modified OE Hurst Shifter, 3.73 12 bolt, GMPP HO roller cam, Hooker headers, Performer intake with modified Q-jet, Accel distributor. Best 1/4 12.3 @108. Funnest run 19.84 @88 full 1/4 mile burn out. 1997 K1500 ext cab 5.7 stock except muffler

01-07-2007, 03:43 PM	#2
ChevyTech Registered User Join Date: May 2004 Location: Minnesota Posts: 4,621	Re: Ignition lock cyl replacment? It is possible you are not in the right spot. Sometimes there is a bit of flash over the opening to release the cylinder. I have seen some that the hole is not visible, being totally covered with aluminum, so it is easy to reach down the wrong hole trying to release the cylinder. Take your pick and push on the aluminum a little to the right of the hole you see and make sure the correct hole is not covered over. Notice the slot – the white arrow that is not pointing to a screw. If the photo does not show here is the site it is from: http://buickperformance.com/tiltstee...lumnwobble.htm

01-07-2007, 07:57 PM	#3
SSC's76 No No Join Date: Jun 2005 Location: Pueblo Colorado Posts: 1,781	Re: Ignition lock cyl replacment? No unfortunately I had the correct spot. The first design lock cyl sucks and if the plastic release tab is gone it sucks worse! I did get it out but I had to do it the hard way by pulling the whole POS apart and chiseled the back of the lock out. Agghh life sucks sometimes! __________________ 1976 Custom Deluxe SWB Med FMB.3/4 Drop. Gen VI 454, Muncie HD 3 speed With Modified OE Hurst Shifter, 3.73 12 bolt, GMPP HO roller cam, Hooker headers, Performer intake with modified Q-jet, Accel distributor. Best 1/4 12.3 @108. Funnest run 19.84 @88 full 1/4 mile burn out. 1997 K1500 ext cab 5.7 stock except muffler

01-09-2007, 12:49 PM	#4
Zoomad75 K5Camper Join Date: Mar 2004 Location: Pueblo, CO Posts: 1,513	Re: Ignition lock cyl replacment? I just had to do the rack in my 75 and it looked just like the pic above for lock cylinder removal. Just used a pick and fiddled with the clylinder and it popped right out. Part of the problem is that the part you are trying to push down to release the cylinder is not exactly flat. It's got a beveled edge, so trying to push mine down with a pick was tricky. It would have worked better for me to use a small flat screwdriver or I've used a stiff feeler gauge. Sorry to hear you had a hard time with it. __________________ Rob Z. 1975 K5 350/465/205/D44/12b 4" lift on 35's- RIP 1991 K5 8.1L/NV4500/241/D44/14b FWC Camper

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