OK.

76 450 SEL has a unit near the passenger side firewall. Has a bunch of vac. lines on top and rad hose though the bottom. Sprung a leak of Antifreeze today. Patch job done. How can I rebuild this thing. And wjhat is it. Someone told me, "that thing" is like 900 bucks...

Please help.

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1976 Mercedes 450 SEL (170K Miles)
1999 Nissan Altima GXE (45,000 km)
1986 Ford Bronco II 4x4