Re: 572 B1 engine install
[Re: AndyF]
#3032743
04/11/22 08:44 PM
04/11/22 08:44 PM
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Joined: Jan 2003
Posts: 16,928 NC
440Jim
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It was drilled very close to 0.750" dia. I was going to just buy a steel "freeze" plug for that size. But, I made some O-ring plugs on my lathe from aluminum stock to match thermal expansion of the hole in the head. When I put them in, they are snug on the O-ring (compression), and I put a smear of RTV above the O-ring for secondary sealing and so it doesn't move. It can't come out since the intake (RB spacers) basically cover all of it.
EDIT: Friend gave me some O-ring design info. A more typical design would be 0.082" depth (vs my 0.089") and more room for the O-ring width 0.143" (vs my 0.105").
Last edited by 440Jim; 04/13/22 04:20 PM. Reason: design info revision
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Re: 572 B1 engine install
[Re: 440Jim]
#3032758
04/11/22 10:08 PM
04/11/22 10:08 PM
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Joined: Mar 2005
Posts: 3,023 NY
B1duster
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Joined: Mar 2005
Posts: 3,023
NY
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Re: 572 B1 engine install
[Re: AndyF]
#3032898
04/12/22 01:49 PM
04/12/22 01:49 PM
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Joined: Jan 2003
Posts: 19,377 Las Vegas
Al_Alguire
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I Live Here
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Well I have had a B1 or 12 and I have NEVER done it. We do pull water from the exhaust side between the siamesed exhaust ports but not on the intake side. Easy fix plug the whole guess I never paid enough attention to the earlier pics of the heads.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: 572 B1 engine install
[Re: 440Jim]
#3033131
04/13/22 12:40 PM
04/13/22 12:40 PM
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Joined: Jan 2003
Posts: 4,276 Morrow, OH
markz528
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Morrow, OH
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It was drilled very close to 0.750" dia. I was going to just buy a steel "freeze" plug for that size. But, I made some O-ring plugs on my lathe from aluminum stock to match thermal expansion of the hole in the head. When I put them in, they are snug on the O-ring (compression), and I put a smear of RTV above the O-ring for secondary sealing and so it doesn't move. It can't come out since the intake (RB spacers) basically cover all of it. As a self-proclaimed O-Ring junkie, I LOVE IT!
67 Coronet 500 9.610 @ 139.20 mph 67 Coronet 500 (street car) 14.82 @ 94 mph 69 GTX (clone) - build in progress......
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Re: 572 B1 engine install
[Re: rickraw]
#3035100
04/19/22 06:18 PM
04/19/22 06:18 PM
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Joined: Jan 2003
Posts: 4,276 Morrow, OH
markz528
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Morrow, OH
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Well that's not good.............
67 Coronet 500 9.610 @ 139.20 mph 67 Coronet 500 (street car) 14.82 @ 94 mph 69 GTX (clone) - build in progress......
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Re: 572 B1 engine install
[Re: 440Jim]
#3035138
04/19/22 08:25 PM
04/19/22 08:25 PM
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Joined: Aug 2003
Posts: 43,251 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,251
Bend,OR USA
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Crap. Setback today. I broke the drive hex on the oil pump drive. I have primed this motor with a drill at least a dozen times during different phase of the build (no lifters, with lifters but no pushrods, pushrods no rockers, and fully assembled. I have run the engine in the garage about 4 times before today. But when I started it today it had zero oil pressure.
I will have to pull the oil pump and do some investigating to see if anything else has a problem. I've had that happen more than once Look inside the oil pump to see what locked it up
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 572 B1 engine install
[Re: Cab_Burge]
#3035338
04/20/22 01:09 PM
04/20/22 01:09 PM
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Joined: Jan 2003
Posts: 19,377 Las Vegas
Al_Alguire
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Well that stinks, but as pointed out couldn't be a better time for it. Time to see what locked it up.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: 572 B1 engine install
[Re: Al_Alguire]
#3035372
04/20/22 03:34 PM
04/20/22 03:34 PM
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Joined: Jan 2003
Posts: 16,928 NC
440Jim
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I unbolted the rack and pinion so I could remove the steering shaft and get the oil pump out without removing the engine. The hex tip of the oil pump drive was still in the oil pump, as expected. There was no debris in the oil pump. The pump turns smoothly by hand (with a hex rod inserted). I measured the outer gear to body clearance and it was fine at 0.009" (brass feeler gage). Spec should be less than 0.014" The tip clearance between inner and outer rotors is within spec (less than 0.010"). It was less than 0.006" Could an engine backfire cause this with stiff valve springs? The day it happened I tried using the MSD start ignition retard, and the engine didn't like it. But then it started the next try (and no oil pressure).
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Re: 572 B1 engine install
[Re: 440Jim]
#3035389
04/20/22 04:32 PM
04/20/22 04:32 PM
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Joined: Jan 2003
Posts: 19,377 Las Vegas
Al_Alguire
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I Live Here
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Las Vegas
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I would never say never on the backfire, but can't imagine how that could occur, but again never say never. I personally hate start retards they seem to cause more issues than they solve. With a separate start and ignition circuit, like 99% of racecars have I have never seen the need for them. I would lean more toward a defect in the oil pump shaft itself, that shaft sure does not look like it was "twisted" off at all. Curious what weight oil and ambient temp?? Maybe a slight alignment problem, I have seen it before and on a older version of a World block......But you would likely notice that on install.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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