Distributor hold-down bracket? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

FLcustom10 · 07-23-2011, 08:45 PM

Should it be installed curved up or curved down? Does this look right?

69heavychevy · 07-23-2011, 08:53 PM

down

lil hoodlum · 07-23-2011, 09:12 PM

Your question confuses me. The top part curves up and the bottom part curves down.

But yes, I do believe you have it installed corectly. Just add you bolt and your golden!

Keith

bbadfred · 07-23-2011, 09:20 PM

Curve up so that the bolt and hold down put even pressure on the dist flange and the manifold boss. So it does not have to be super tight to hold the dist from rotating and change the timing.

chevytruckluver · 07-23-2011, 09:51 PM

picture 2 looks to be correct, it should be arched if you were to look at it from a side view and the bolt would try to flatten out the arch as it is tightened down.

fastwillie 696969 · 07-23-2011, 10:05 PM

to me it looks like pic 2 is correct with the rust on the under side of the bolt head .

FLcustom10 · 07-23-2011, 10:07 PM

Thanks guys.

Lee H · 07-23-2011, 11:51 PM

To be clear the curve or crown should be up.
Posted via Mobile Device

fastwillie 696969 · 07-24-2011, 03:32 AM

this would be a good question for mechanic A or mechanic B for the ASE test

Monty · 07-24-2011, 08:29 AM

the convex or 'bumps' should be down. they are the contact points with the manifold and distributer. that is how the engineers controll the location of the pressure points, even with casting variations and tolerance stacking...

each leg of the distributor 'fork' often has a crown or radius facing the same way (down) as the bump on the manifold leg of the clamp. this puts down pressure on two points 180* from each other on the dist collar.

picture #2 is the right way

FLcustom10 · 07-24-2011, 08:57 AM

I'd be mechanic 'C' Fastwillie!

Good explanations.

07-23-2011, 08:45 PM	#1
FLcustom10 Registered User Join Date: Feb 2007 Location: Tallahassee, FL Posts: 322	Distributor hold-down bracket? Should it be installed curved up or curved down? Does this look right? Attached Images

07-23-2011, 09:12 PM	#3
lil hoodlum Registered User Join Date: Oct 2009 Location: Denton, Texas Posts: 1,735	Re: Distributor hold-down bracket? Your question confuses me. The top part curves up and the bottom part curves down. But yes, I do believe you have it installed corectly. Just add you bolt and your golden! Keith

07-23-2011, 09:20 PM	#4
bbadfred bbadfred Join Date: Mar 2008 Location: rantoul Il Posts: 461	Re: Distributor hold-down bracket? Curve up so that the bolt and hold down put even pressure on the dist flange and the manifold boss. So it does not have to be super tight to hold the dist from rotating and change the timing.

07-23-2011, 09:51 PM	#5
chevytruckluver Eat, Sleep, Drive a Chevy Join Date: Apr 2010 Location: the town of the cow, Texas Posts: 1,152	Re: Distributor hold-down bracket? picture 2 looks to be correct, it should be arched if you were to look at it from a side view and the bolt would try to flatten out the arch as it is tightened down. __________________ Trey Silence may be Golden, but Duct Tape is Silver! 72 Short Step 57 "big window" short step

07-23-2011, 10:05 PM	#6
fastwillie 696969 ~Rest In Peace~ Join Date: May 2005 Location: CALIFORNIA NOR CAL Posts: 9,707	Re: Distributor hold-down bracket? to me it looks like pic 2 is correct with the rust on the under side of the bolt head . __________________ is it fast ? it has a lighting bolt donut? B___H please, I can remove 90% of your so called "beauty" with a kleenex

07-23-2011, 08:53 PM	#2
69heavychevy Registered User Join Date: Jan 2007 Location: Garland,TX Posts: 431	Re: Distributor hold-down bracket? down

07-23-2011, 10:07 PM	#7
FLcustom10 Registered User Join Date: Feb 2007 Location: Tallahassee, FL Posts: 322	Re: Distributor hold-down bracket? Thanks guys.

07-23-2011, 11:51 PM	#8
Lee H Registered User Join Date: Jun 2010 Location: Upland Ca Posts: 4,147	Re: Distributor hold-down bracket? To be clear the curve or crown should be up. Posted via Mobile Device __________________ 1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703

07-24-2011, 03:32 AM	#9
fastwillie 696969 ~Rest In Peace~ Join Date: May 2005 Location: CALIFORNIA NOR CAL Posts: 9,707	Re: Distributor hold-down bracket? this would be a good question for mechanic A or mechanic B for the ASE test __________________ is it fast ? it has a lighting bolt donut? B___H please, I can remove 90% of your so called "beauty" with a kleenex

07-24-2011, 08:29 AM	#10
Monty Registered User Join Date: Jun 2011 Location: Montana Posts: 78	Re: Distributor hold-down bracket? the convex or 'bumps' should be down. they are the contact points with the manifold and distributer. that is how the engineers controll the location of the pressure points, even with casting variations and tolerance stacking... each leg of the distributor 'fork' often has a crown or radius facing the same way (down) as the bump on the manifold leg of the clamp. this puts down pressure on two points 180* from each other on the dist collar. picture #2 is the right way Last edited by Monty; 07-24-2011 at 08:43 AM.

07-24-2011, 08:57 AM	#11
FLcustom10 Registered User Join Date: Feb 2007 Location: Tallahassee, FL Posts: 322	Re: Distributor hold-down bracket? I'd be mechanic 'C' Fastwillie! Good explanations.

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