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Winter is on its Way!

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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jbo6924
Posts: 89
Joined: 10 January 2010
Year and Model: 1998 v70 t5
Location: New Jersey

Re: Winter is on its Way!

Post by jbo6924 »

OK, Thanks!

mindshadow
Posts: 257
Joined: 26 May 2009
Year and Model: none
Location: Birmingham

Post by mindshadow »

Regarding the thermostat issue, if your needle moves down while running the heat (from the middle 3 o'clock tick mark to the one right below it) when the heater is turned on is that an indicator of a bad thermostat? I've noticed my heater is acting a tad funny. It'll run fine some of the time and sometimes it's not very effective and won't blow any heat at all. A/C runs fine though.

jbo6924
Posts: 89
Joined: 10 January 2010
Year and Model: 1998 v70 t5
Location: New Jersey

Post by jbo6924 »

Still having trouble with the heat. Any photos out there of the heater core and the tubes to be checked for being clogged? :oops:

jblackburn
MVS Moderator
Posts: 14043
Joined: 8 June 2008
Year and Model: 1998 S70 T5
Location: Alexandria, VA
Has thanked: 9 times
Been thanked: 19 times

Post by jblackburn »

Regarding the thermostat issue, if your needle moves down while running the heat (from the middle 3 o'clock tick mark to the one right below it) when the heater is turned on is that an indicator of a bad thermostat? I've noticed my heater is acting a tad funny. It'll run fine some of the time and sometimes it's not very effective and won't blow any heat at all. A/C runs fine though.
Yeah, you've got a bad thermostat. Change the ECT sensor while you're in there as well, since it usually goes out in short order with a bad thermostat.

Here's a picture of the tubes (those two brown ones); you'll see them at the back of the engine by the turbo intake pipe.
Image
BTW, if your pipe looks that messy, you're in for a PCV cleaning too ;) Again, this is only a real long shot. Usually the flow is just fine, but I have seen a clogged heater core on a car once before. If you turn the ECC control from full cold to full hot, do you hear something moving in the dash and the air flow change pitch a bit?
'98 S70 T5
2016 Chevy Cruze Premier


A learning experience is one of those things that says, "You know that thing you just did? Don't do that."

mercuic: Long live the tractor motor!

jbo6924
Posts: 89
Joined: 10 January 2010
Year and Model: 1998 v70 t5
Location: New Jersey

Post by jbo6924 »

That's great! I'll check it in the morning. and keep you posted.
Thanks.
Jim

jbo6924
Posts: 89
Joined: 10 January 2010
Year and Model: 1998 v70 t5
Location: New Jersey

Post by jbo6924 »

I've been told by the Dealer that I'm in need of a Heater-core, and various other items that are connected to such. Costly...anyone out there ever re-build an heater core or do we just Toss and Replace? Need to be smart with the $'s.
Any input always welcome. I'm confident I can do the work myself..."with a little help from my friends."
Jim

jblackburn
MVS Moderator
Posts: 14043
Joined: 8 June 2008
Year and Model: 1998 S70 T5
Location: Alexandria, VA
Has thanked: 9 times
Been thanked: 19 times

Post by jblackburn »

It's like a mini-radiator - if it starts leaking, just toss it and replace it. FCP Groton has the best price on one that I have seen, as I too am in the market for one (mine was just O-rings, but I did my shopping around first - they ALL will go at some point).

Here's how to go about it: http://volvospeed.com/vs_forum/index.ph ... e-install/

BTW, you'll need to get the O-rings from your dealer. The green FCP ones are junk and leak.
'98 S70 T5
2016 Chevy Cruze Premier


A learning experience is one of those things that says, "You know that thing you just did? Don't do that."

mercuic: Long live the tractor motor!

jbo6924
Posts: 89
Joined: 10 January 2010
Year and Model: 1998 v70 t5
Location: New Jersey

Post by jbo6924 »

Will Do! Thanks for the up-date. I checked the pricing and also found Groton to be the most economical. I'll be ordering this week...and will keep you all up to date on the progress/process. Maybe I could take some photos of the process.

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