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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKIV-A4 TDIs (VE and PD)

VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

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Old February 19th, 2019, 20:51   #1
red loctite
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Default The dreaded heater core replacement

I am preparing for the daunting task of replacing my heater core this weekend. I have 1 day to do it. I have read and viewed many posts. The only thing i am concerned about is the heater core itself. I want to buy an OEM, but the finances just won't allow ot. I am going to do a thermostat at the same time in Hopes it won't be as bad for heat as a lot of people say it is. I am going to get a Spectra brand from Autovalue here in Alberta. I am also going to grab a roll of foam just in case. What size foam will I need and how thick? I am definitely not looking forward to it, but it is too far from warm weather to put it off. It is so bad, I can't even drive it because it is so cold. The mist freezes on the windows pretty fast......
Wish me good luck Saturday. I am making sure I have lots of ziploc bags and egg cartons for bolts....
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Old February 19th, 2019, 20:54   #2
Turbo_B5
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Default The dreaded heater core replacement

No dude go to concept1 in Calgary/Westside in Edmonton and get a replacement heater core from them. Whatever they suggest. Not some sh itty random parts bin store. Not a job you wanna do twice.


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Old February 19th, 2019, 20:59   #3
STDOUBT
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And get a high-temp thermostat (195F/90C) - not an OEM that will open to the radiator (and begin cooling off) well before full operating temp.
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Old February 19th, 2019, 20:59   #4
red loctite
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Quote:
Originally Posted by Turbo_B5 View Post
No dude go to concept1 in Calgary/Westside in Edmonton and get a replacement heater core from them. Whatever they suggest. Not some sh itty random parts bin store. Not a job you wanna do twice
I will call them tomorrow and see. I didn't think to call them. I got an oil pan for my old 2.slow and it was pretty cheap, I hope a HC will be a decent price. Thanks for the info
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Old February 19th, 2019, 21:01   #5
red loctite
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Quote:
Originally Posted by STDOUBT View Post
And get a high-temp thermostat (195F/90C) - not an OEM that will open to the radiator (and begin cooling off) well before full operating temp.
And its egr deleted too, so the higher temp should help with heat in the winter
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Old February 19th, 2019, 21:03   #6
Turbo_B5
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Default The dreaded heater core replacement

My co worker was complaining his wife’s Tdi wouldn’t heat up like his did. Told him to change the thermostat and that was the issue. Get one from concept1 aswell. Not sure if it will be true 90c as mentioned above. I run genuine thermostat with borh grills blocked off. The heat was great this evening in Edmonton at like -5c


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Old February 20th, 2019, 01:25   #7
mk116v
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I did mine recently. I'd suggest covering the blend doors with aluminium duct tape. I've used it on several occasions and have had great resutls. I also replaced the foam seals between the vents and the dash with heavy duty rubber seals made by 3M that I found at yhe local hardware store. All I can say is take your time doing it, and good luck.
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Old February 20th, 2019, 04:18   #8
WildChild80
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Is your heater core leaking? If not it's probably just the blend door foam that's missing. I had the same problem and was about to do the same when I decided to try the metal tape...I have heat, now if your engine isn't coming up to temp, then you have a thermostat issue

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Old February 20th, 2019, 05:21   #9
red loctite
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Quote:
Originally Posted by WildChild80 View Post
Is your heater core leaking? If not it's probably just the blend door foam that's missing. I had the same problem and was about to do the same when I decided to try the metal tape...I have heat, now if your engine isn't coming up to temp, then you have a thermostat issue
No doubt its leaking.
The "smoking gun" is the "smoking" vent
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Old February 20th, 2019, 05:31   #10
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Lol

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Old February 20th, 2019, 11:35   #11
BobnOH
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If you are limited to 1 day I would suggest just the the heater core. You'll do good to get that done in 1 day, unless of course you've done it before.
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Old February 20th, 2019, 11:44   #12
red loctite
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Nope. Never done it before. Read lots about it and watched videos. I'm as ready as possible. I got a nissen heater core from concept 1 in calgary
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Old February 20th, 2019, 11:46   #13
red loctite
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Anyone know what warmer thermostat I should use? Part number?
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Old February 20th, 2019, 11:48   #14
~TDIguy~
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I was about to tackle mine and decided to check with the local shop first on a quote to have it replaced. Luckily they went by book time which is 3.15 hours according to him, they stuck to there quote and got me out the door for a total price of 570$! he said they had over 10 into it though. Might be worth your time to check around just in case.
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Old February 20th, 2019, 11:53   #15
red loctite
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I think they mis quoted you. You got a deal. No way I'd pay 500 to someone
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