Re: Need help diagnosing pop in freshly rebuilt front end 71RR
[Re: AARCONV]
#1892444
08/15/15 03:29 PM
08/15/15 03:29 PM
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Joined: Jun 2007
Posts: 129 Springfield, MO
Steve88
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Check for cracks around where the k frame mounts to I will double check the K member mounts but the car does has a Bob's Profab K member that I recently installed so hopefully they will be ok.
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Re: Need help diagnosing pop in freshly rebuilt front end 71RR
[Re: TJP]
#1892471
08/15/15 04:23 PM
08/15/15 04:23 PM
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Joined: Jun 2007
Posts: 129 Springfield, MO
Steve88
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Repeat the test with the wheels on the ground and the motor running as the hydraulic pressure may eliminate the end play. IF not time for a steering box. I tried the same test with the engine running and end the play is definitely less with the hydraulic power applied. Could I get someone with a power steering box to try the same test without thier car running to see if they get similar results from the steering box input shaft? It would be just moving the steering wheel back and forth a little without thier car running and observing the input shaft to the steering box. Thanks
Last edited by Steve88; 08/15/15 04:37 PM.
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Re: Need help diagnosing pop in freshly rebuilt front end 71RR
[Re: Steve88]
#1893068
08/16/15 06:03 PM
08/16/15 06:03 PM
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Joined: Jan 2003
Posts: 5,405 Pikes Peak Country
TC@HP2
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the car does has a Bob's Profab K member that I recently installed so hopefully they will be ok.
Did you contact Bob's to see if they have any feedback on their systems doing this? Might be a commonly overlooked item.
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Re: Need help diagnosing pop in freshly rebuilt front end 71RR
[Re: Steve88]
#1893106
08/16/15 07:02 PM
08/16/15 07:02 PM
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Joined: Dec 2014
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ruderunner
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Look closely at any parts that are bolted together, you're looking for shiny spots or chipped paint that indicates a part shifting around. You may need brighyt lights and a magnifying glass.
Angry white pureblood male
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Re: Need help diagnosing pop in freshly rebuilt front end 71RR
[Re: Steve88]
#1893133
08/16/15 07:34 PM
08/16/15 07:34 PM
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Joined: Nov 2010
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Spaceman Spiff
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jersey
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I see you have a lot of aftermarket front end parts, but state you torqued everything according to the service manual. perhaps some/all of these parts have different toque values than stock, and something isn't tight enough, or to tight, causing binding?
526 cubes of angry wedge, pushbutton shifted, 9 passenger killer!
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Re: Need help diagnosing pop in freshly rebuilt front end 71RR
[Re: Steve88]
#1893188
08/16/15 09:31 PM
08/16/15 09:31 PM
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Joined: Jan 2003
Posts: 1,906 Harriman NY
71GTX471
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Retorque the aftermarket K frame.Find an auto tech with a set of chassis ears & go noise hunting.
Last edited by 71GTX471; 08/16/15 09:36 PM.
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Re: Need help diagnosing pop in freshly rebuilt front end 71RR
[Re: Steve88]
#1893347
08/17/15 12:44 AM
08/17/15 12:44 AM
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Joined: Jan 2003
Posts: 4,807 Moved to N.E. Tennessee
GomangoCuda
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Please correct me if I am wrong but the Bobsprofab k members that I have seen have r&p steering, coil over shocks and are intended for light weight race cars. Perhaps you have an Altercation k member instead.
Last edited by GomangoCuda; 08/17/15 12:49 AM.
In theory, there is no difference between theory and practice. In practice, there is.
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Re: Need help diagnosing pop in freshly rebuilt front end 71RR
[Re: GomangoCuda]
#1893475
08/17/15 10:50 AM
08/17/15 10:50 AM
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Joined: Jun 2007
Posts: 129 Springfield, MO
Steve88
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Please correct me if I am wrong but the Bobsprofab k members that I have seen have r&p steering, coil over shocks and are intended for light weight race cars. Perhaps you have an Altercation k member instead. I think Bob's Profab makes a couple different K members or at least did in the past. This one is few years old but takes all of the stock stuff except for a stock style swaybar. I went out last night and double checked everything and made sure that everything is tight. I drove the car in front of my shop some and I did noticed that it is really more of a series of pops rather than just one pop. Going straight everything seems good then a very slight turn to the left I get 2-3 pops right together and same when turning back straight. It does seem to be worse if I turn while backing up. At this point I am open to any idea but I am fairly confident that its not anything being loose because I have checked and double checked all the fastners a couple of times. I can get an occasional pop out of it in my shop but its hard to duplicate the problem when not driving. With the the front wheels off the ground there is no issues at all. With the tires on the ground I get a pop occasionaly with the engine running or not. One I start drving it pops each time I turn and is easily duplicated but of course it is hard to see what is going on while drving.
Last edited by Steve88; 08/17/15 10:51 AM.
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Re: Need help diagnosing pop in freshly rebuilt front end 71RR
[Re: Steve88]
#1893538
08/17/15 01:07 PM
08/17/15 01:07 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
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Lincoln Nebraska
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Any possibility the tbars ain't square? (as in horizontle) with that being an aftermarket setup. When it went together did the bars slide in with what appeared to be a good fit?
live every 24 hour block of time like it's your last day on earth
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Re: Need help diagnosing pop in freshly rebuilt front end 71RR
[Re: Steve88]
#1893565
08/17/15 02:18 PM
08/17/15 02:18 PM
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Joined: Jan 2003
Posts: 4,807 Moved to N.E. Tennessee
GomangoCuda
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It does seem to be worse if I turn while backing up. Strut bar bushings? Are they urethane? If so they can creek and pop, lube them. Check strut bar mounting points on k frame and control arms for cracks.
In theory, there is no difference between theory and practice. In practice, there is.
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Re: Need help diagnosing pop in freshly rebuilt front end 71RR
[Re: GomangoCuda]
#1893631
08/17/15 04:21 PM
08/17/15 04:21 PM
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Joined: Jun 2007
Posts: 129 Springfield, MO
Steve88
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It does seem to be worse if I turn while backing up. Strut bar bushings? Are they urethane? If so they can creek and pop, lube them. Check strut bar mounting points on k frame and control arms for cracks. The torsion bars seemed to go in ok. Once I got control arms clocked where they needed to be the bars slid right. I have been wondering if there is an issue with the strut rods. I used the stock strut rods with the Moog 7026 bushings. Is there a way I could have installed them incorrectly causing the lower control arm to get in bind? I probably should have went with adjustable strut rods since everything is aftermarket and that would have allowed for some adjustability.
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