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DJ911
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Joined: 24 Oct 2014
Posts: 48
Location: Nottingham


PostPosted: Thu Mar 05, 2020 11:53 am    Post subject: Need to replace heater matrix/core Reply with quote

I've been having steamy windows, a smell of coolant and an intermittent check coolant warning and it looks like I need to replace my heater core. Probably looking at around £600 for the specialist to do it.

Has anyone done this themselves or have access to a guide?

I'm fairly novice when it comes to car DIY - have done some basic jobs like brakes / MAF replacement. Looks like you can get access from the frunk only and I'll need to drain/vacuum the coolant and replace it which is new to me.

Thanks in advance.
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Alex
Le Mans
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Joined: 06 Mar 2014
Posts: 17707
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Thu Mar 05, 2020 1:05 pm    Post subject: Reply with quote

Mine needs doing but waiting till better weather. Access is from under the frunk lid. See guide below:


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DJ911
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Joined: 24 Oct 2014
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Location: Nottingham


PostPosted: Thu Mar 05, 2020 4:46 pm    Post subject: Reply with quote

Thanks for this.

Do you think it's a job that can wait then? It certainly doesn't cause me much of an issue day to day; just the very occasional misting and heat, which kind of helps in the winter months. I guess coolant leaking about isn't ideal.

Maybe i'll wait for the summer too. Was thinking of sourcing a used part possibly. Is it an absolute must to suck out and replace the coolant? If this requires expensive parts, I might be better going wth the specialists.

Sorry, I'm a bit of a novice!
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Alex
Le Mans
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Joined: 06 Mar 2014
Posts: 17707
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Thu Mar 05, 2020 5:04 pm    Post subject: Reply with quote

No coolant loss except what's in the heater matrix - that's what the clamps are for in the description above.

Heater matrix is only £70 new:

https://www.ebay.co.uk/itm/Porsche-911-996-Boxster-986-Heater-Heat-Matrix-Exchange/153743194218
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DJ911
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Joined: 24 Oct 2014
Posts: 48
Location: Nottingham


PostPosted: Thu Mar 05, 2020 6:43 pm    Post subject: Reply with quote

Thanks, so no messing with the coolant then.

That's a good price, used though.

My specialist were saying around £280 for a new part.
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Alex
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Joined: 06 Mar 2014
Posts: 17707
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Thu Mar 05, 2020 6:45 pm    Post subject: Reply with quote

oooops didn't see that Embarassed
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Alex
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Joined: 06 Mar 2014
Posts: 17707
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Thu Mar 05, 2020 6:46 pm    Post subject: Reply with quote

Try that:

https://www.buycarparts.co.uk/hella/12769656
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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7962
Location: Brighton


PostPosted: Thu Mar 05, 2020 7:05 pm    Post subject: Reply with quote

You will also need a new foam panel that seals the heater box / matrix .

Fitting the new one of these is just about the hardest part of this job .. its sticky and unless you are careful it sticks to the bodywork it touches .

It's a very easy job and you will have no trouble .

Just to confirm though .. do you have steamed up windows on the inside when the car warms up and possibly a sticky residue on the windscreen ?

That's the normal type of symptoms for this .. if you are putting a pint of coolant in per week then it won't be this part as a leak from the matrix goes into the car and will soak the carpets .
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My Daughter's Crowdfunding has hit the target .

Thank you all so Very much .

She's not going until july 2020 though .



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MisterCorn
Dijon


Joined: 08 Jan 2011
Posts: 7620
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Thu Mar 05, 2020 9:24 pm    Post subject: Reply with quote

Some details here.

http://911uk.com/viewtopic.php?t=125503&postdays=0&postorder=asc&start=40

MC
 
  
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DJ911
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Joined: 24 Oct 2014
Posts: 48
Location: Nottingham


PostPosted: Thu Mar 05, 2020 10:40 pm    Post subject: Reply with quote

deMort wrote:
You will also need a new foam panel that seals the heater box / matrix .

Fitting the new one of these is just about the hardest part of this job .. its sticky and unless you are careful it sticks to the bodywork it touches .

It's a very easy job and you will have no trouble .

Just to confirm though .. do you have steamed up windows on the inside when the car warms up and possibly a sticky residue on the windscreen ?

That's the normal type of symptoms for this .. if you are putting a pint of coolant in per week then it won't be this part as a leak from the matrix goes into the car and will soak the carpets .


Thanks for this. I recently had a major service and the specialist seemed fairly sure it was the heater matrix. I've definitely been having steaming on the inside of the windows, which made think the air con was on its way out initially, and occasional blasts of heat. The carpets don't seem wet but there is a sweet smell in the cabin that the specialist noticed more than I did TBH.

Where can I source the foam panel? Thanks again.
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DJ911
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Joined: 24 Oct 2014
Posts: 48
Location: Nottingham


PostPosted: Thu Mar 05, 2020 10:42 pm    Post subject: Reply with quote

MisterCorn wrote:
Some details here.

http://911uk.com/viewtopic.php?t=125503&postdays=0&postorder=asc&start=40

MC


Some great pictures there which will really help. I will take this job on I think. I have another car if I get stuck at least!

I don't fancy removing an air-con pipe, is that a must?

Cheers,

Dave
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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7962
Location: Brighton


PostPosted: Fri Mar 06, 2020 8:56 pm    Post subject: Reply with quote

Halfords can degas and regas so it's not a problem .. new seals are best though.

I would think actually getting the matrix out and past this pipe might be a struggle if not removed .. to be honest it's been years since i've done this so i'm unsure but a quick trip to halfords will get the gas out if needed .

Think of the labour saving .. also think of the fun in doing this job .. it's a challenge .. well worth a diy instead of having someone like me doing it and my garage charging you for the pleasure .

It's an achievement and worth the effort imho .
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My Daughter's Crowdfunding has hit the target .

Thank you all so Very much .

She's not going until july 2020 though .



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DJ911
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Joined: 24 Oct 2014
Posts: 48
Location: Nottingham


PostPosted: Sat Mar 07, 2020 8:09 pm    Post subject: Reply with quote

Thanks for the advice, I'll give it a go, take some pictures and report back. All part of the fun! First off I'm removing the front bumper on Monday to clean out the crud. Should be satisfying.
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DJ911
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Joined: 24 Oct 2014
Posts: 48
Location: Nottingham


PostPosted: Thu Mar 19, 2020 3:37 pm    Post subject: Reply with quote

deMort wrote:
You will also need a new foam panel that seals the heater box / matrix .

Fitting the new one of these is just about the hardest part of this job .. its sticky and unless you are careful it sticks to the bodywork it touches .

It's a very easy job and you will have no trouble .

Just to confirm though .. do you have steamed up windows on the inside when the car warms up and possibly a sticky residue on the windscreen ?

That's the normal type of symptoms for this .. if you are putting a pint of coolant in per week then it won't be this part as a leak from the matrix goes into the car and will soak the carpets .


Planning on taking this job on shortly, particularly if I get isolated! Do you know where I can source the foam panel? Haven't had any luck via Google but probably using the wrong search terms.

Thanks in advance. Will post some project pics when I get underway.
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Alex
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Joined: 06 Mar 2014
Posts: 17707
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Thu Mar 19, 2020 4:53 pm    Post subject: Reply with quote

OPC. They're usually pretty good on price. If not then probably rosepassion.

https://www.rosepassion.com/en/diagrams-porsche-996-2000-eu-996-carrera-4-cabrio-manual-gearbox-6-speed/heating-and-air-conditioning-system-385/heating-water-feed-and-return-pipes-2628/99657226302-p95513-gasket-left-hand-drive-95513
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DJ911
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Joined: 24 Oct 2014
Posts: 48
Location: Nottingham


PostPosted: Thu Mar 19, 2020 5:19 pm    Post subject: Reply with quote

Great, thanks.

I can see they've got them in stock at Design911 too but for LHD cars! Does is matter for this part?

https://www.design911.co.uk/fu/prod141269/Porsche-997-996-Boxster-Cayman-Heater-hose-gasket-99657226302/
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Alex
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Joined: 06 Mar 2014
Posts: 17707
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Thu Mar 19, 2020 5:38 pm    Post subject: Reply with quote

Just googled it and it looks like they are different for *HD:

https://www.deroure.com/diagrams.asp?MAK=3&MDL=28&TBL=3366&SMA=0&SMO=0&ST=sensor&SC=0
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DJ911
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Location: Nottingham


PostPosted: Thu Mar 19, 2020 7:13 pm    Post subject: Reply with quote

That's a great site, cheers will order the RHD gasket then.
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DJ911
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Location: Nottingham


PostPosted: Fri Mar 20, 2020 7:30 pm    Post subject: Reply with quote

I got this far today, removed the wipers and plastic section. Took me a little while to work out what needed undoing.



The foam cover looks pretty good, wonder if I might get away with reusing it with some adhesive. Don't really understand what it adheres to but I guess I'll find out!

I'll remove the wiper assembly tomorrow and clamp off the hoses and see if I can move the air con pipe out of the way to extract the matrix.

If all goes well, I'll order the matrix, around £90 from design 911. Seems to be out of stock elsewhere.

Fingers crossed I'll save on the £600 plus quoted!
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DJ911
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PostPosted: Fri Mar 20, 2020 7:30 pm    Post subject: Reply with quote

**accidental duplication**
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