Manufactured of high quality aluminum alloy which expands and contracts at the same rate as the aluminum cylinder head. Selecting similar materials make for a more stable seal between
the two components.
| Part Number: 188441 Manufacturer Number: 11 53 1 740 478 |
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The factory water manifold on most 24 valve, six cylinder vehicles is made of plastic. Unfortunately, plastic will not handle the heat or over-torquing of the mounting bolts. We have discovered that even the new plastic manifolds from BMW can be warped by as much as 1/16". Water leaks resulting from the failure of the original plastic component have claimed many engine failures. We have now reproduced this item in a more stable, low-pressure cast aluminum.
