 Mystery spring? |
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| burlybryan |
 Sep 22 2026, 06:34 PM
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#1
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Member  Group: Members Posts: 175 Joined: 25-May 20 From: Saint Paul Member No.: 24,311 Region Association: None 
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I found a mystery spring on my shop floor and wondered (long shot) if it seems familiar to anyone. It's a working metal shop, so it could have come from some other tool or gizmo. It's a pretty robust spring about 1/2" x 3/16" - the kind that would be in the bore of a tool or on a trigger.
For reference, I got my engine back from the rebuilder as a long block and built up the rest of the FI bits, etc in the shop. Thanks for humoring me! Attached image(s) 
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| emerygt350 |
Sep 23 2026, 07:59 AM
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#2
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Advanced Member Group: Members Posts: 3,751 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
Looks like the oil pressure regulator spring. I think. Haven't looked at mine in a while. Maybe it's too small for that. I recognize it from somewhere.... Shift linkage? Ignition switch?
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| burlybryan |
Sep 23 2026, 08:57 AM
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#3
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Member Group: Members Posts: 175 Joined: 25-May 20 From: Saint Paul Member No.: 24,311 Region Association: None
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Is there a spring in the rear clutch or shifter assembly? Those bits have been dangling and banged around for months. I've rebuilt the shifter lever assembly before, but nothing opened up this time. Spring looks too small for an oil press relief valve.
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| Ninja |
Sep 23 2026, 09:13 AM
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#4
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Member Group: Members Posts: 315 Joined: 25-September 25 From: Granbury Texas Member No.: 29,004 Region Association: Southwest Region |
I may be wrong; thought I saw something like this ripping a T4 down.
Spring under distributer drive. I know there is a special thrust washer that usually stays in the block when you remove the dist and then falls out when you turn the engine over. There might be a spring as well to reduce distributor shaft play. Hopefully one to the engine builders can verify this |
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| rfinegan |
Sep 23 2026, 10:00 AM
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#5
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Senior Member Group: Members Posts: 1,224 Joined: 8-February 13 From: NC Member No.: 15,499 Region Association: MidAtlantic Region
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The distributor spring is longer and smaller diameter wire and OD
...but I like the way you are thinking Following, as I do not recall this in any of my builds QUOTE(Ninja @ Sep 23 2026, 11:13 AM)  I may be wrong; thought I saw something like this ripping a T4 down. Spring under distributer drive. I know there is a special thrust washer that usually stays in the block when you remove the dist and then falls out when you turn the engine over. There might be a spring as well to reduce distributor shaft play. Hopefully one to the engine builders can verify this |
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| ctc911ctc |
Sep 23 2026, 10:14 AM
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#6
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Senior Member Group: Members Posts: 1,380 Joined: 9-June 18 From: boston Member No.: 22,206 Region Association: North East States
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My vote - shift lock tension spring in a 901
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| emerygt350 |
Sep 23 2026, 01:21 PM
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#7
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Advanced Member Group: Members Posts: 3,751 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
QUOTE(ctc911ctc @ Sep 23 2026, 10:14 AM) My vote - shift lock tension spring in a 901 Yeah, it's just so clean.... I bet that is it. |
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