Upper rubber suspension travel rubber bumper size?
Have a missing rubber conical shaped rubber upper front suspension bumper missing and want to replace it with whatever the correct part is. Ordered one from Paragon (P. N 701K ) and it is taller than the one still intact and on the other side of the car. Obviously one is incorrect - but which one? Any images of an original conical bumper - it has a knot on the flat end that pushes through a hole in the frame, it is not the camel humped one that is bolted to the "A" arm. The car in question is a 1966 Feb 22 built conv. . Thanks in advance for your help!
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Re: Upper rubber suspension travel rubber bumper size?
Thanks, Gary. The bumper received is a 1 7/8" tall from the flat surface to the tip - Paragon says it is GM 3742247 equal. The one remaining on the car is 1 1/8 " tall measured from the flat surface to the tip, so a considerable difference. I also suspect from a bit of research that the GM part number has morphed to allow this to happen somewhere along the line. The image in the Paragon catalog appears to be the short and fat looking one but is in reality the taller replacement. Have a call in to their tech line - maybe someone knows the answer since have only been able to talk to the lady who answers the phone. Some pre-enjoyed (nice way of saying used) bumpers on e-bay as you pointed out and they look to be the correct size. Hope that some vendor offers the correct replacement but seems another simple item will turn into a sub project as often happens. Will post the results. Looks like Corvette America has the correct part pictured (their part number 42486) but too early to get in touch with them for a hands on measurement.Comment
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Re: Upper rubber suspension travel rubber bumper size?
John,
There is one NOSComment
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Re: Upper rubber suspension travel rubber bumper size?
John,
Older Paragon catalog shows their number 1342K for upper bumper 63-75.. Appears to be shorter and fatter in picture as compared to the 701K
I have a pair of the 701K which are 1 1/2" tall.
RayComment
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Re: Upper rubber suspension travel rubber bumper size?
Ray,
In a 2009 DB posting, Carl French said:
Paragon 701 is 1.5" tall and 1.5" in diameter at the base
Paragon 1342 is 1.5" tall and 1.82" in diameter at the base
The Paragon 1342 part appears to have been discontinued. They sell the 701 part for all C1 and C2 and C3. I bet for consolidation reasons, not for accuracy reasons.
GaryComment
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Re: Upper rubber suspension travel rubber bumper size?
Gary,
Thanks for the update. I agree, for all the consolidation reasons, this is the number that has survived for all the listed applications.
RayComment
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Re: Upper rubber suspension travel rubber bumper size?
John-------
Here's what I can tell you about these bumpers:
According to GM all 1963-82 Corvettes were originally fitted with upper bumper of GM #3742247. This bumper was also used for 1958-64 full size Chevrolets (for those of you that are unaware, the front suspension on all 1963-82 Corvettes was essentially the same as 1958-64 full size passenger cars). This bumper is 1-1/2" OD at its base and 1-3/8" in height (excluding the retention button)
Curiously, though, GM simultaneously cataloged 2 upper front bumpers in SERVICE. The GM #3742247 was cataloged for 1963-82 Corvettes. However, at the same time, GM cataloged bumper GM #384220 for 1963-75 Corvettes. Why this was done I do not know. However, from experience this "feels like something other than a mistake" to me. This is especially because the 384220 would function perfectly in place of the 3742247. The 384220 is a very old part number and was used on many other Chevrolet models as well as other GM car lines. It is 1-13/16" OD at its base and 1-1/2" in height (excluding the retention button). The retention buttons for both the 3742247 and 384220 are identical allowing either to be used in the same size hole.
Here are some photos of both bumpers [not for sale]:
DSCN3985.jpgDSCN3986.jpgDSCN3987.jpgDSCN3989.jpgIn Appreciation of John HinckleyComment
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Re: Upper rubber suspension travel rubber bumper size?
Joe,
Did C1s originally use the 384220 bumper?
GaryComment
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Re: Upper rubber suspension travel rubber bumper size?
Joe, thanks for all of the information! Talked to the tech guy at Paragon about their 701 reproduction bumper and he was aware that it was taller than the ones they used to sell. Those early reproduction parts are now not available. the 701 is 1 1/2" in diameter at the large end and a 1 3/4 inches tall. Yesterday I called around and pestered anyone who sells parts that would spend the time looking at their stock and it seems that only the taller (701 type) is now available. Only place I had any luck was Mid America in Effingham Il where I talked to a wholesale account sales guy named Duane Hudleston who is a long time contact. He went to the warehouse and pulled their bump stop (P/ N 696-620) and gave me the height of the bumper not including the tit. I ordered a pair yesterday afternoon and received them this morning and the measurements are as follows: 1 7/16" diameter at the bottom, and 1 7/16" tall. I They look like the short, fat bumpers that Joe has provided as GM part ----220. The ones from Mid America are very close is not the same as the one remaining in our car. Again, I have no clue if this remaining bumper is original or a replacement sometime in the past. I was told that Moog at one time made what the guy remembered as an exact look alike for the short and fat bumper but had dropped that listing some time in the past. Was unable to find any old Moog listings to get a part number so could not search for obselete stock. Looks as if I will be using the Mid America supplied bumper - still not knowing what the original part looked like when installed February of 66. Perhaps those of you with an original C2 can look and see what your car came with and provide something concrete in the way of correct appearing suspension bumpers for production in that general time frame. Thanks to all for their help and knowledge.Comment
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