Finally got my 5a out for a run

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Timharwood69
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Finally got my 5a out for a run

Post by Timharwood69 » Fri Nov 01, 2019 9:43 pm

Evening all,
Looking for a bit of advice re general running of a 45 year old 5a. If have been working on mine since I bought it in March this year and after changing the water pipes, coolant, oil, rear brake shoes and rewiring the melted fuse box I finally managed to get it out on the road. First run was going well until it started to cut out, it would start straight away but cut out again a few yards later managed to get it back home and found the rear brakes binding one side and the brake liner floating about in the drum the other side, hence the rear brake change and the plugs where black so leaned the mixture off a bit. The second outing was a bit more successful as it didn't cut out but still have a couple of problems, the fan comes on with frightening regularity about every minute or so but the temp gauge never goes above 90, just driving around side streets but not sitting in traffic. The second problem is when accelerating it acts as if I am slipping the clutch but its an auto box, or the car is wheel spinning before a bit of a gentle thud before changing gear, bit hard to describe exactly what happens but doesn't happen all the time just seems to be at a certain throttle position going from first to second. The box also seems a bit clunky but I am used to newer automatic cars and the last time I drove anything this old was my old 1973 beetle so not much to compare it to. It hasn't run for a couple of years and previous to that was only driven to the MOT station and back so probably not driven in anger in 4 years, I will try and get it out for a longer run and see what happens but could it be that after such a long lay up it just needs to be driven and get everything moving again. Everything is pretty much standard apart from Accuspark ignition, K&N filter.
Any thoughts and advice greatly appreciated.

Cheers
Tim



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philhoward
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Finally got my 5a out for a run

Post by philhoward » Sat Nov 02, 2019 6:47 am

The fan should come on and off pretty regular and will do unless you’re doing over about 30mph. If the temp doesn’t get much over 90 then it’s doing it’s job perfectly.

The old BW35 gearbox is quite fussy about the kickdown cable adjustment as it’s the only way it knows when and how violent to change gear, so I’d say that’s worth investigation. Check the colour of the fluid when you check the level (instructions are in the manual - it’s not quite straight forward) - if it’s not bright red then needs changing.


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MikeyBikey
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Finally got my 5a out for a run

Post by MikeyBikey » Sat Nov 02, 2019 7:56 am

As per phil's advice, yes the fan comes on regularly. Ive use my 5a extensively, road going and sprinting and, as long as your cooling system is in good order , it will work well. Just make sure the radiator isn't crudded up, same with engine block. Sometimes the pump is an aftermarket one say, QH, that has pressed steel fins rather than the original ford cast ones. These don't work quite as well. I bought a cheap laser temp gun from lidl and it tells you what the engine temp really is.

as long as she's not boiling over, your fine.


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Finally got my 5a out for a run

Post by rkclodhopper » Sat Nov 02, 2019 8:47 am

Tim, assuming your carb is original fit which should be a Weber 38dgas, the mixture screws only influence the idle mixture, screw them both in fully then wind them out three turns, then wind them out or in a bit more at a time until it idles best, do both screws Together, these carbs have fixed main jets so no adjustment is possible to running mixture just the idle mixture as already said. Do you have the automatic choke fitted, the carb would have two water hoses running to it, or it might have been retrofitted with a manual cable operated choke which is easier to check to make sure it’s going right off, the auto version can stick partially on.



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Finally got my 5a out for a run

Post by willholderogri » Sat Nov 02, 2019 9:35 am

The temp sounds ok .I would recommend you change the auto oil they don't last long if it's past it use. I fitted a magnetic oil plug in my bw35 .it requires tapping out metric size but this is a good mod as the original is a flat head screwdriver cheesehead screw. And is a pain in the bum to remove unless you have access to a ramp .


1962 mini, bedford CA , KR200. morris 1000, mini pickup.several escorts,ford grandad.ford cortina X2 ,astra, SE5A x 2 ,ford focus.

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Finally got my 5a out for a run

Post by willholderogri » Sat Nov 02, 2019 9:37 am

Make sure you get the right oil for the box


1962 mini, bedford CA , KR200. morris 1000, mini pickup.several escorts,ford grandad.ford cortina X2 ,astra, SE5A x 2 ,ford focus.

Timharwood69
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Finally got my 5a out for a run

Post by Timharwood69 » Sat Nov 02, 2019 3:56 pm

Thanks for all the advice wont worry about the fan now and will have another tinker with the carb as the idle is a bit rough until it gets warm, the choke has been converted to a manual and seems to be working fine. I might try some hotter plugs if they still come out sooty, I have the 3 prong things they sent out with the new ignition and never used them before so will see what happens. The gearbox oil is nice bright red so assumed it was ok but will check the level again and look at the kick down cable as that would make sense of the problem I've been having.
Thanks all



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