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2003 S60 Fluctuating coolant level. (New coolant reservoir cap) Topic is solved

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
2001 - 2009 S60
2003 - 2007 S60 R

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Re: Fluctuating coolant level.  Topic is solved

Post by veenee » Sun Jan 14, 2018 10:22 am

Ha! So it was just the cap - good for you!

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Re: Fluctuating coolant level.

Post by jonesg » Mon Jan 15, 2018 1:43 am

Cookie-the-Swede wrote:
Sun Jan 14, 2018 10:15 am
There's no milky or discolored oil OR coolant. There's no white smoke coming from the tail pipe. It's not overheating.
I replaced the coolant reservoir cap and it isn't "boiling off" anymore. I still plan on replacing the radiator since it seems to have a small leak in the front right corner of the car.
That could still be the gasket if the problem moved from the cap to the radiator.

You can pull the overflow hose from the bottle at the rad, submerge hose in a bottle of water and watch bubbles from a cold start ,
if bubbles follow engine speed up and down it's the gasket.
Had the same problem on my old volvo, it blew the rad too.

Blown head gasket will not result in coolant in the oil , or oil in the coolant.
Combustion gas will overpressurize the cooling system.

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Re: 2003 S60 Fluctuating coolant level. (New coolant reservoir cap)

Post by RickHaleParker » Mon Jan 15, 2018 4:09 am

I still plan on replacing the radiator since it seems to have a small leak in the front right corner of the car.

If it is just a small leak. I would JB Weld it. Works just as good as a replacement, lot less work and money.

My S90 had a small leak in the radiator core.
  • Drained radiator.
    Cleaned around the leak with a brush and Acetone.
    Placed some JB Weld over the leak, pressed it in with a penny.
    Left the penny in place and let the JB Weld cure.
    Refilled radiator.
Been fine ever since.
Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
Platform P2 2004 S60R, B2524T4, AW50/51 AWD, B8444S TF80 AWD, Bosch Motronic 7.0, BorgWarner K24 turbocharger. V8 conversion in progress.

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