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DaytimeNightlife
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'78 SC Valve Spring Replacement New Ones Too Small?
I found 2 broken valve springs in my engine when I was doing a valve adjustment. I decided to order all new springs, keepers, and seals. I was replacing them when I found that the new ones are too skinny.
The larger original had an inside diameter of about 24.5 mm and the new ones are about 22.5 mm. The smaller original was about 17.5 and new one about 15.8 The new ones don't fit in the retainer. I ordered the set of 901.105.901.50 right here from Pelican. I see there is also a set with part number 901.105.901.51. Both say they fit my car. The one ending in 50 is a little cheaper and was ready to ship so I ordered it. I replaced a few before I realized they clearly weren't correct. Can anyone help with any info here?      
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10-28-2025, 09:56 PM
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Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,510
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WTH? Never seen that.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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10-29-2025, 09:29 AM
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Banned
Join Date: Aug 2025
Posts: 3
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The new valve springs are correct, the original ones removed from your engine expanded in size and that's you keep thinking the new ones won't fit
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10-29-2025, 09:37 AM
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DaytimeNightlife
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The springs don't sit flush on anything. I cannot see how this is correct. Can anyone with experience verify that they have installed the small ones and it was ok?
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10-29-2025, 09:49 AM
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i just measured all my extra springs about 14-pairs . Yours is definitively some kinda miss stock..i would return them....
Ivan
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1985 911 with original 502 191 miles...808 198 km "The difference between genius and stupidity is that, genius has its limits". Albert Einstein. |
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10-29-2025, 12:10 PM
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DaytimeNightlife
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Quote:
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10-29-2025, 12:52 PM
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Join Date: Jan 2022
Posts: 204
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Hi
Could you please add some pics of the packaging that the defective valve springs came in ? May help identify who manufactured them etc. Cheers |
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10-30-2025, 01:09 AM
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DaytimeNightlife
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Quote:
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10-30-2025, 06:35 PM
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It's a 914 ...
Join Date: Jan 2008
Location: Ossining, NY
Posts: 4,780
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Someone pulled the wrong parts from the bin and sold them to you. It happens. I had a set of aftermarket springs come to me with two incorrect spring bases once. They were like .020" too small. Springs didnt seat correctly. Check everything!
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10-31-2025, 05:41 AM
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Join Date: Dec 2014
Posts: 13,988
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Don’t buy budget valve springs.
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We are dominated by the relatively small number of persons who understand the mental processes and social patterns of the masses. It is they who pull the wires which control the public mind. |
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10-31-2025, 05:55 AM
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It's a 914 ...
Join Date: Jan 2008
Location: Ossining, NY
Posts: 4,780
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Mine weren't even budget parts. I guess good vendors make mistakes too.
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10-31-2025, 09:31 AM
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DaytimeNightlife
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They came in bags with the correct part numbers attached. It wasn't a mistake of sending the wrong parts. I ordered a new OEM set and they arrive today. I will report back with they're sizing.
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10-31-2025, 10:52 AM
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DaytimeNightlife
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New OEM springs came and are normal size. Buyer beware with anything other than OEM. I blindly trusted Pelican, which was clearly foolish.
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11-11-2025, 01:02 PM
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Quote:
Ivan
__________________
1985 911 with original 502 191 miles...808 198 km "The difference between genius and stupidity is that, genius has its limits". Albert Einstein. |
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11-11-2025, 01:13 PM
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