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Thread: Putting a 1,6 HF back on the road

  1. #41
    Legendary Lancista Marnix's Avatar
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    Re: Putting a 1,6 HF back on the road

    Don't overdo the size of the small leak hole: About 1mm diam. is what is needed.
    Lancia Fulvia 2C 1964
    Lancia Fulvia Coupe Rallye 1,3 1968
    Porsche 924 1979
    Alfa Romeo 33 1.4IE 1993

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    Active Lancista Akonaut's Avatar
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    Re: Putting a 1,6 HF back on the road

    Karl,

    actually the radiator was leaking from a crack in the lower waterbox. This crack was right beside a welding spot with which the support made of sheet metal was fixed to the waterbox. All of that was covered with tin solder, so the leak was quite small and the coolant dripped into the support panel first, leading to its deterioration. It became a hole only when I removed the rusty parts and the "spot" was broken out of the brass. Anyhow it was only ment to show one of the places where to look when investigating coolant loss.

    My company is a manufacturer of temperature control valves. Due to this we have spent a lot of time with cooling circuits and I personally did a lot of research on Flaminia cooling circuits leading to some very helpful developments. For instance these:



    The one on the left should be known to you, the other one is for Aurelia. You are on the servo seal-list, I will send an email to you about the thermostat.

    One word about the bleeding hole. As Brian correctly said, its main purpose is to allow a small coolant flow, setting the thermostatic element into action, the air vent is secondary, the air will start moving as soon as the valve opens anyway. Therefore the position of the bleeding hole is not so critical.

    Furthermore I do not believe that a radiator cap with higher relief pressure value will solve the water loss. As far as I can see there are two reasons why the cap will open (act as a pressure relief valve, what it actually is). 1. You have steam pressure in the top water box, because of high temp in the system, that is what I would say is the intended function. 2. You have water pressure from the coolant having passed the engine and being pumped up into the top water box of the radiator while the radiator itself has too much flow resistance (clogged). Both effects may add to each other, but turning up the relief pressure by means of a different cap most likely will not solve the problem.

    Hubert
    Last edited by Akonaut; 30th October 2018 at 11:18 AM.
    Flaminia GT 3C, Flaminia Convertibile 3C, Flaminia Coupé-project-, Flavia Convertibile 1.8, Fulvia Sport 1.3S, A112 Abarth 70HP, Mercedes Benz Unimog U406

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    Re: Putting a 1,6 HF back on the road

    Thanks for all the good advice!

    I did some work on the car yesterday, so i removed the thermostat to drill it for a bleeding hole. Upon closer inspection it turned out it already hade a bleeding hole...
    So I reinstalled the thermostat, filled up water and took her for a spin round the blocks. The temperature rose steadily and got up to 90, when I decided to turn home, then it dropped to around mid 70s so I continued for a while and it seemed steady there. When Home I checked the water level and the water was a bit brownish, so I replaced the water and flushed the radsiator and the rest of the system as good as I could.
    I will try to make a couple of more short runs and flush the system to see if I get the brown stuff out (The car had a blown head gasket when I bought it (even though I was not informed of that...), so hopefully it is only old engine oil, worst case someone tried to fix the head gasket with radiator sealant)
    Once the system is clean I will fit the highly anticipated super thermostat, that will give better cooling and give it a smother start.
    Karl

    1964 Flaminia Touring Convertible 3C 2.8
    1965 Fulvia Berlina (Appendix K project)
    1969 Fulvia 1,6 HF
    1999 Ypsilon
    2003 Thesis 3,2
    2011 Delta 1,8 Di T-Jet

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    Legendary Lancista bmarler's Avatar
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    Re: Putting a 1,6 HF back on the road

    sounds promising. 90c is not horrible, 80 would be better, 70 might be a bit cool. keep in mind the gauge itself is probably off a little too. as you plan, flushing the system will be a good thing, and i'd keep flushing till it comes clean. (as long as the temps are kind to pure water anyway)
    my 1,3 tends to run up to 85 or so before it settles down to 75-ish and stabilizes so i don't think you're too far off.
    bmarler/
    1967 fulvia sport zagato
    1961 appia vignale convert.

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    Legendary Lancista Marnix's Avatar
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    Re: Putting a 1,6 HF back on the road

    Can't say for a 1,6, but most 1,3 run at between 70 and 75 under normal driving conditions. Be aware that the temperature gauge reading on the Fulvia is not very accurate and not to be relied on for absolute values, better use one of the infra red temperature probes.
    Lancia Fulvia 2C 1964
    Lancia Fulvia Coupe Rallye 1,3 1968
    Porsche 924 1979
    Alfa Romeo 33 1.4IE 1993

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    Re: Putting a 1,6 HF back on the road

    One advantage of doing work under the dashboard is that you can take the dash home and fix it as well. Loads of cracks and lost colour in the old thing.

    Some very gentle sanding down, filling in the cracks and adding some colour and then finally a new coat of lacquer:
    Attached Thumbnails Attached Thumbnails IMG_1484.JPG  
    Karl

    1964 Flaminia Touring Convertible 3C 2.8
    1965 Fulvia Berlina (Appendix K project)
    1969 Fulvia 1,6 HF
    1999 Ypsilon
    2003 Thesis 3,2
    2011 Delta 1,8 Di T-Jet

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