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Author Subject: Coolant system won't bleed
cwspellowe

Seasoned Pro

Location: Calderbank

Registered: 19 Jul 2009

Posts: 6,496

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Post #1
Urgh now I've fixed the fans I've got another problem.

Basically I've been trying to bleed the coolant system. the rad and thermostat have bled absolutely fine, but the top bleed point behind the heatshield won't do anything. I've followed the guide word for word with the header tank but no water comes out even after an hour. the water level doesn't even seem to drop in the header tank.

I know there's an airlock there cos the heating is on the blink but I can't bleed it for the life of me.

also about a litre of coolant is disappearing every month. could be a leak somewhere upstream? but if so its only losing 30ml per day which isn't much, and surely not enough to prevent the system from bleeding..?

suggestions please lads Smile

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Posted 3rd Dec 2009 at 02:06
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,839

Status: Offline
Post #2
have you tried taking the screw fully out of the pipe? sounds like you may have a blocked pipe or worse a blocked matrix.

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Posted 3rd Dec 2009 at 02:29
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cwspellowe

Seasoned Pro

Location: Calderbank

Registered: 19 Jul 2009

Posts: 6,496

Status: Offline
Post #3
just had a think regarding the loss of coolant, blatantly the heater matrix. I've had a ridiculous amount of condensation on the windscreen for a few weeks. I guess I answered my own question there...

now just how to bleed it..?

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Posted 3rd Dec 2009 at 02:29
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cwspellowe

Seasoned Pro

Location: Calderbank

Registered: 19 Jul 2009

Posts: 6,496

Status: Offline
Post #4
yeah screw was all the way out. I'll try and jimmy the bleed pipe tomorrow

oh and don't think the matrix is blocked, it blows hot air for about 10 seconds so something warm is getting to it, but if it's just hot air. I'm guessing that's why it goes cold so quick?

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Posted 3rd Dec 2009 at 02:34
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,839

Status: Offline
Post #5
possible that it has been radwelded up Doh

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Posted 3rd Dec 2009 at 02:33
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cwspellowe

Seasoned Pro

Location: Calderbank

Registered: 19 Jul 2009

Posts: 6,496

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Post #6
funny thing is the previous owner made a thread about the same problem 2 years ago, guess he never fixed it....

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Posted 3rd Dec 2009 at 02:36
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mr2swzo

Regular

Location: County Durham

Registered: 30 Sep 2009

Posts: 361

Status: Offline
Post #7
I had a problem recently with the matrix bleed point too. I took the screw completely out and no coolant came out. It turned out that the pipe was blocked by gunge and i simply used a long nail to scrape out the gunge and hey presto, coolant came through.
Hope you fix it soon, it's a bad time of year to have no heat! Not to mention the damage it may do to your engine.
Posted 8th Dec 2009 at 04:38
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spaniel

Junior User

Location: margate

Registered: 07 Dec 2009

Posts: 60

Status: Offline
Post #8
have you tried gently applying some revs, i had this problem and it cleared it fine for me
Posted 10th Dec 2009 at 01:28
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jeffers Forum Admin

Location: Leeds

Registered: 14 Dec 2003

Posts: 3,702

Status: Offline
Post #9
If your getting condensation, 100% heater matrix gone dude!Sad

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Posted 10th Dec 2009 at 04:59
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c_j_m

Seasoned Pro

Location: Andover

Registered: 23 Sep 2007

Posts: 1,917

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Post #10
2ltr bottle in the rad with the top cut off.
Rases the water above the bleed point allowing to to be bled properly.
Posted 10th Dec 2009 at 06:59
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cwspellowe

Seasoned Pro

Location: Calderbank

Registered: 19 Jul 2009

Posts: 6,496

Status: Offline
Post #11
jeffers wrote:
If your getting condensation, 100% heater matrix gone dude!Sad


c_j_m i've followed the bleeding guide to the letter. I'm siding with jeffers, i think the matrix is f*cked Sad

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Posted 10th Dec 2009 at 20:24
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mike306

Senior User

Location: Lancs

Registered: 11 Jun 2005

Posts: 532

Status: Offline
Post #12
Better wrap up warm matey Razz

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Posted 11th Dec 2009 at 05:21
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c_j_m

Seasoned Pro

Location: Andover

Registered: 23 Sep 2007

Posts: 1,917

Status: Offline
Post #13
It'll still bleed all the air out even if the matrix is leaking slightly.
Just if its a really big leak it'll let the air in.
Posted 11th Dec 2009 at 05:43
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r*byb

Regular

Location: Tamworth

Registered: 15 Sep 2007

Posts: 421

Status: Offline
Post #14
Where is the guide your following ? i need to totally drain mine on Saturday.

Cheers

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Posted 16th Dec 2009 at 05:12
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