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Repair Database Category: Everything Radiator Etc.

Everything having to do with keeping the Volvo engines at the correct running temperature.

July 13, 2014

1998 vs. 1999 Changes & Differences

Well, what are they? MVS Forums member (hey, it’s free, why not register?) j-dawg and the rest of the crew answer this important bit of Volvo trivia. This is actually one of the more interesting bits of P80 lore, to me. No idea why. 98- cars don’t have the electronic throttle, VVT, solid lifters, as […]

1998 vs. 1999 Changes & Differences
September 25, 2013

Coolant System Flush, Volvo 850, S70, V70 – Video

MVS Forums member Robert shows us in a YouTube video how to do a key winterization procedure: “I flushed the coolant system in my 850. This process should be the same for most FWD Volvos, including the S70, V70, S40, C70, etc.” Coolant System Flush, Volvo 850, S70, V70 – Video

Coolant System Flush, Volvo 850, S70, V70 – Video
December 11, 2012

Blown Heater Hose: 1998 S70 T5

I was out driving home after getting home, getting a text to pick up some cough medicine and doing so, and almost made it home. I accelerated to 50 after the person in front of me turned left and heard POP! followed by a huge trail of steam behind my car. I immediately pulled her […]

Blown Heater Hose: 1998 S70 T5
October 14, 2012

DIY: 1998 V70 ECT (Engine Coolant Temp) Sensor Replacement

So, when it is cold, the ECU injects extra fuel to start the engine. The problem is, when the ECT fails, it usually fails in “HOT” position (short-circuit inside the sensor), I have these 2 symptoms:

Aux fan runs on its own for about 6 minutes or so.
Hard start when COLD (ECU thinks it is hot and no need to inject extra fuel when it is COLD).

DIY: 1998 V70 ECT (Engine Coolant Temp) Sensor Replacement
July 8, 2012

Head Gasket Change Parts List

You want to do the valve seals while you’re at it. This is not an overkill because they are probably nearing the end of their life cycle and will develop oil seepage (just to make you feel regretful one day that you have to redo the gasket).
On another note, have you ever overheated the engine? Even if you haven’t, the mating surfaces for the head gasket need to be planed. There is usually a reason for the gasket to fail (and not always an apparent one).

Head Gasket Change Parts List