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Air Lock - any advice welcome - sorted thanks

Engine/Gearbox questions and discussion
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vanzep
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Air Lock - any advice welcome - sorted thanks

Post by vanzep » Mon Oct 22, 2012 2:27 pm

Well ive fitted my radiator and fan but just cannot seem to get it bled....

Maybe im missing something so heres what ive done:

Drained old rad and removed it.
Installed new rad and fan
Filled with coolant
left rad cap off
started engine
set heater to max
let it run for about 1 1/2 hours
top hose hot
bottom hose cold
no fan kick in
:evil:

any thoughts - im running out of patience - thsi should have been a 30 minute job now its turning into a pain in the arse :?
Last edited by vanzep on Mon Oct 22, 2012 7:25 pm, edited 1 time in total.
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Post by Merlin » Mon Oct 22, 2012 2:32 pm

Have you open the coolant bleed valve on the block?
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Post by Pushki » Mon Oct 22, 2012 2:35 pm

^^This^^

+ gently squeeze the rad hoses to force the air/coolant to circulate. :)
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Post by vanzep » Mon Oct 22, 2012 2:39 pm

yeah i tried gently squeezing hoses
when i open the bleed valve do i need to have the rad cap on?

i did open it and nothing came out so i closed it again :?
1996-2000 1993 EG9 Blue Civic 1.6 Vti - Traded in against the BB4
2000-2019 1994 2WS BB4 Milano Red JDM Prelude Si VTEC LSD

2015 on > 1991 4WS BB1 Phantom Pearl Grey JDM Prelude Si VTEC LSD
2021 ON > 1998 2WS BB6 White Pearl JDM Prelude Si VTEC

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Post by Merlin » Mon Oct 22, 2012 2:40 pm

Image from teh Wiki - Coolant bleed valve location
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http://www.ludegeneration.co.uk/post14248.html#p14248

The engine must be warm and there must be pressure in the system for it to push the air out of this valve ie. Get the engine warm then open this valve. You need the rad cap on and closed for this to work.

When I bled my sytem last (a few weeks ago) it took a while for enough pressure to build up for the bleed valve to work.
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Post by vanzep » Mon Oct 22, 2012 2:42 pm

ok so warm it up with rad cap off and then put rad cap on and open bleed valve
1996-2000 1993 EG9 Blue Civic 1.6 Vti - Traded in against the BB4
2000-2019 1994 2WS BB4 Milano Red JDM Prelude Si VTEC LSD

2015 on > 1991 4WS BB1 Phantom Pearl Grey JDM Prelude Si VTEC LSD
2021 ON > 1998 2WS BB6 White Pearl JDM Prelude Si VTEC

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Post by Merlin » Mon Oct 22, 2012 2:43 pm

Leave the rad cap on so the pressure builds.
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BA8......... BB4......... BB8.........The JDM Muscle Bus

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Post by vanzep » Mon Oct 22, 2012 2:44 pm

ok going out to give it a go - thanks for the advice :)
1996-2000 1993 EG9 Blue Civic 1.6 Vti - Traded in against the BB4
2000-2019 1994 2WS BB4 Milano Red JDM Prelude Si VTEC LSD

2015 on > 1991 4WS BB1 Phantom Pearl Grey JDM Prelude Si VTEC LSD
2021 ON > 1998 2WS BB6 White Pearl JDM Prelude Si VTEC

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Post by Pushki » Mon Oct 22, 2012 2:47 pm

The manual suggests rad cap off when bleeding.

Have you put some coolant into the reservoir up to the MAX mark?
Have you reconnected the fan electricals?
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Post by Merlin » Mon Oct 22, 2012 2:57 pm

When I was attempting a bleed from an empty system I could not get the bleed valve to give any water, much like Vazep describes. It was only after running the car with the rad cap on that I could get water/air out of the valve :?
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BA8......... BB4......... BB8.........The JDM Muscle Bus

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