Hello,
My coolant expansion tank cap seems to be weeping a little, should the cap screw down onto a rubber washer?
If so then I must have lost mine at some point.
Many thanks
Coolant Expansion Tank Cap
Moderator: martauto
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Brianmoooore
- E30 Zone Team Member
- Posts: 49353
- Joined: Mon Jan 10, 2005 11:00 pm
Flat rubber washer at the top has nothing to do with keeping coolant in. The O rings on the side are the pressure seals.
The cap in the pic. is from an iS, which uses a different (2 bar) cap from the 1.4 bar cap fitted to most other E30s. Unless your car is an iS, the original cap should have been replaced under a safety recall around seventeen years ago, which is still active. Most replacement caps have a yellow disc at the bottom instead of black, so if yours doesn't appear to have been changed, visit your dealer for a free replacement.
The cap in the pic. is from an iS, which uses a different (2 bar) cap from the 1.4 bar cap fitted to most other E30s. Unless your car is an iS, the original cap should have been replaced under a safety recall around seventeen years ago, which is still active. Most replacement caps have a yellow disc at the bottom instead of black, so if yours doesn't appear to have been changed, visit your dealer for a free replacement.