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stealthfti | all galleries >> Galleries >> headwork > through the years...
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through the years...

Here is a display of the three different single valve springs that Volvo used on the SOHC head.

On the left is the original size valve spring; and it's lower seat washer, and it's upper retainer. Used from 1975 until the early '80s, it is still a popular choice for those uprating the performance of their redblocks; having been proven reliable and durable to 6800rpm and a bit higher.

The part numbers for the old style spring set up:

spring: 463739-3
upper retainer: 1266797-8 [previously was 463749-2]
lower washer [seat]: 463399-6

In the middle is the spring, lower seat, and upper retainer that Volvo went with in the early '80s. It works adequately.

The part numbers:

spring: 9135130-4
upper retainer: 9135131-2
lower washer [seat]: 9135132-0

On the right is the latest version of the valve spring, introduced in the early '90s.

The part numbers:

spring: 9135130-4
upper retainer: 9135131-2
lower washer [seat]: 9135132-0

Notice that the part numbers did not change from the middle springs to the latest springs. This was unusual. Normally, when a part was superceded, the numbers were also changed. That did not occur in this instance.

Not shown is a double valve spring configuration that Volvo has had available through the years for competition use.

other sizes: small medium large auto
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Guest 14-Jan-2007 20:32

stealthfti14-Jan-2007 09:25
No, they are not identical, at all. The 1st gen springs are considerably larger outside diameter. Whichever spring you intend to use, you have to have the uppers and lowers that go with that spring.

The only things that are interchangeable are the locks: the keepers.
Guest 12-Jan-2007 16:24
In the photograph it appears the first and third generation valve springs are identical. Do you know if the first and third generation upper and lower retainers are interchangeable? Thanks.