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Heater Hoses & Fuel Economy Questions 200 1981

posted by  tqburke on  Sat Jan 31 11:34 CST 2004
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Hi,

One of the heater box hoses in the engine bay has sprung a leak. I can see the connections on the firewall but do you need to remove the intake manifold to get to the other end?

Also, the car's fuel economy has never been great but getting worse with age, mind you it has never run better at 400,000km. I was wondering if anyone has tried different carburetors and achieved better economy?

Thanks,
Trevor








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    Heater Hoses & Fuel Economy Questions 200 1981

    posted by  Trev29 on  Sun Feb 1 00:31 CST 2004
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    last visit: Fri Oct 17 05:56 CST 2014
    [RELATED]

    As you have a carbed engine, you have lots of room to work in, compared to FI.
    I didn't need to remove the intake manifold.

    Those hoses tend to get stuck on to the tubes, so if twisting or a screwdiver doesn't work, cut them off.

    I like the SU carb for its adjustability and durability. Don't know if its best for mpg though. Was getting between 10 and 11 kms per liter city-hwy (20 liters should get me 200 kms), but haven't checked lately. This is with a 3.93 differential and as descibed below.
    --
    1980 245 Canadian B21A with SU carb and M46 trans








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    Heater Hoses & Fuel Economy Questions 200 1981

    posted by  Jim Holst on  Sat Jan 31 11:42 CST 2004
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    last visit: Tue Jan 4 11:05 CST 2011
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    It's possible to do the job without pulling the intake manifold but easier if you do. I did it and it's close quarters. You should replace both hoses. One has a connection to the head and you can usually get at the hose clamp between the 3rd and 4th intake manifold runners. The other hose connects behind the head to the pipe which runs forward under the exhaust manifold to connect to the water pump. It's sort of mechanics by touch.







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