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Clutch fluid

Discussion in '"Stock" Alpine' started by skywords, May 31, 2016.

  1. skywords

    skywords Donation Time

    Dot 3 as I recall?
  2. hartmandm

    hartmandm Moderator Diamond Level Sponsor

    The stock setup was the clutch hydraulic fluid was the same as the brakes - DOT 4. Don't mix fluid types.

  3. Bill Blue

    Bill Blue Platinum Level Sponsor

    Looks like the "proper" fluid varied. The Series 3 owners manual I have states DOT3.

  4. hartmandm

    hartmandm Moderator Diamond Level Sponsor

    Thanks Bill. I shouldn't answer questions without knowing the series in question. :)

  5. skywords

    skywords Donation Time

    Thanks all I will go with dot 3. The car is a series I. When I disassembled the slave the cup was melted like jello so I want to be sure to use the correct stuff. Again thanks.
  6. 65beam

    65beam Donation Time

    DOT 3 and DOT 4 brake fluids are compatable. they both are blended using a glycol ether base but DOT 4 has a borate ester added to handle higher temps found in todays braking systems. DOT 3 was the norm for when these cars were built but as things evolved it could no longer handle the temps. a DOT 4 won't hurt the rubber and should be used in place of the DOT 3 fluid. never mix DOT 3 with a DOT 4 in a modern vehicle or you may lose full braking action. todays high braking temps will degrade the DOT 3 and it could boil and cause air bubbles in the system. don't mix silicone with these fluids or you have complete chaos. in other words there is no reason to use and old spec DOT 3 fluid when you can use a current spec fluid. that goes for the clutch system also.
  7. DanR

    DanR Diamond Level Sponsor

    Mike, I too speak sometimes without realizing the Series matter.;) I appreciate your feed to the forum and the PIC's of your very nice Alpine.

    Many many many years ago I read that Dot 4 was a replacement for the Dot 3.

    So, what to do with the old Instructions? I guess we should make a pen&ink change and go from there. Mr Bill and I are from the older times and we have a hard time (sometimes) get'n up to par:D

    However, Mr Bill is way ahead of me with his fast or I should say quick bomb. Check the 20-80 readings for a starter.

    65beam has the expertise in the field with petro & such from what I've read from past post. I learned a bit on the DOT 5 also.

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