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1999 s70 awd no heat [low coolant] 9144221 [map of ECC damper positions] Topic is solved

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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abscate
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Re: 1999 s70 awd no heat [low coolant] [map of ECC damper positions]

Post by abscate »

Solved the mystery of no low coolant light , bulb tested good.

This is a really bad idea, kids
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Empty Nester
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Post by matthew1 »

oof
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1998 V70, no dash lights on

1997 850 T5 [gone] w/ MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace

2004 V70 R [gone]

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rolsen11
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Post by rolsen11 »

abscate wrote: 15 Feb 2026, 09:34 Solved the mystery of no low coolant light , bulb tested good.

This is a really bad idea, kids
Yikes...
2000 V70 SE - Bought sight unseen in Cleveland, currently my only car. Looks identical to my profile picture

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Post by Chieber »

When did you got Evita? That’s just nuts.
1/2 a shitbox V70 1998 2.5 NA

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abscate
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Post by abscate »

Chieber wrote: 16 Feb 2026, 05:07 When did you got Evita? That’s just nuts.
This is on Karla Kat, a 1999 s70 AWD

She is a capital auction special, I drove her home from DC in blissful ignorance like this.

The coolant level bulb is self tested by the DDM on a 1999, so I knew the bulb was good. Silly me for not checking for a bypassed warning system.

Evita is a 2018 rescue from NJ, a very cool lawyer chemist I still talk to regularly

Juno is a December 2025 rescue from ARF Hampton’s who talks every morning.
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Post by abscate »

Polished this one off with a new level sensor from FCP
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Post by abscate »

Wrapping up this.

I measured the dead volume of the heater core 9144221 as 300 ml +- 50ml

This does not include any pipe volume. Temperature 22c, P= 1012 torr, Jupiter aligned with Mars.
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