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06-20-2017, 12:02 AM | #1 |
Registered User
Join Date: May 2016
Location: Downey, CA
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Steering box case ruptured! Why?
Hi,
Just out of no where I loose power steering, upon inspection I find a ruptured steering box. The box was replaced maybe 600 miles ago by a nearby garage. Since having the box replaced I completed a lq4/4l60 swap. What could have caused this to fail? Is there and relevance to the motor swap having an affect? |
06-20-2017, 12:21 AM | #2 |
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Join Date: Mar 2003
Location: Colfax-California
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Re: Steering box case ruptured! Why?
I doubt it, just a box whos time was up or was defective. Who knows how many rebuilds there were before you got it
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06-20-2017, 12:32 AM | #3 |
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Join Date: May 2016
Location: Downey, CA
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Re: Steering box case ruptured! Why?
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06-20-2017, 12:46 AM | #4 |
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Re: Steering box case ruptured! Why?
Over pressure issue, what pump are you running on that engine swap?
Metal Fatigue combine with over pressure and that may be why. That would be a first in my 50 some odd years. |
06-20-2017, 01:15 AM | #5 |
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Re: Steering box case ruptured! Why?
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06-20-2017, 12:46 AM | #6 |
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Re: Steering box case ruptured! Why?
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06-20-2017, 06:52 AM | #7 |
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Re: Steering box case ruptured! Why?
You'd think the seals or hoses would blow before that. I don't know how many PSI is involved, but I seriously doubt enough to blow out a cast iron case. Probably a mechanical failure, like a part came loose and went were there's no place for it
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
06-20-2017, 06:58 PM | #8 |
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Re: Steering box case ruptured! Why?
The mechanical Dark Side of driving. That is a great observation.
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06-20-2017, 07:47 AM | #9 |
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Join Date: Apr 2011
Location: Klein Texas
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Re: Steering box case ruptured! Why?
I suspect it was cracked by someone trying to remove the snap ring on the cover. They might have jammed their pin punch in the hole and were too rough trying to remove it.
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My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe |
06-20-2017, 07:57 AM | #10 |
2WD Jimmy
Join Date: Mar 2005
Location: Davis County, Utah
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Re: Steering box case ruptured! Why?
Sure looks to me like it was hit with something.
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06-20-2017, 06:14 PM | #11 |
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Join Date: Dec 2011
Location: Moraga, CA
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Re: Steering box case ruptured! Why?
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(Very) Slow-Going Build Thread: Stock 1970 Short Step with Stock 1970 LT-1 http://67-72chevytrucks.com/vboard/s...d.php?t=567340 |
06-20-2017, 08:03 PM | #12 |
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Re: Steering box case ruptured! Why?
The main issue with this failure sounds like the LS pump is putting out too much pressure, compared to the needs of the box itself...these old boxes run somewhere around 500 psi peak...the LS pumps can put out over 2000 psi...especially the hydroboost pumps...
I would be looking at reducing the bypass pressure of the pump relief valve...maybe slowing down the pump... The failure looks like the assist piston actually pushed the end cap out...metal fatigue due to age, plus wrong pressure...eventual failure...hope this helps... |
06-21-2017, 06:21 AM | #13 |
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Re: Steering box case ruptured! Why?
I can't see duct tape or bailing twine fixing this. RTV?
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
06-24-2017, 02:45 AM | #14 |
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Join Date: Aug 2005
Location: Los Angeles
Posts: 1,342
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Re: Steering box case ruptured! Why?
I saw this happen on a Dodge van once. Casting failed, cracked right down the center. Don't think it was a Saginaw box.
I say just one of those things, I can't see how the pump could make enough pressure to do this to a good housing, and I figure the hose would go first as others have stated. Or the belt would slip.
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