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Flushing the coolant on a 440 1994 1.8

Discussion and advice for 440, 460, 480 owners.

1986 - 1997 440
1986 - 1997 460
1986 - 1997 480

newold440
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Flushing the coolant on a 440 1994 1.8

Post by newold440 » Sun Jun 29, 2008 11:33 am

Hi, can anyone tell me the correct procedure to flush the head through on a 440 1.8 of the 1994 vintage?.
Im ok with flushing the radiator but I intend to change the coolant and would like the whole system to be clean as it appears to have been neglected by its previous owner.

Thanks in advance

Matt



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billofdurham
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Post by billofdurham » Sun Jun 29, 2008 12:12 pm

Welcome to Matthew's Volvo Site.

Before draining the system ensure that the heater control is set on 'Hot'. Drain the system. Remove the two hoses from the engine to the radiator and, for full flushing, remove the thermostat. Replace the themostat housing temporarily. No need for a new gasket at this stage. Using a hosepipe flush the engine/heater through the top pipe on the head. Don't use too much water pressure. This actually back flushes the system which is the best way to flush radiator or engine.

When the water runs clear replace the thermostat, using a new gasket, reconnect the hoses and slowly refill the system with water/antifreeze mix. The heater control must still be on 'Hot' whilst refilling to prevent air locks. Whilst filling gently massage the two big hoses to help expel air.

Bill.


Work was good - retirement is better.

1996 850GLT 2.5 20v Estate Manual.
1995 Peugeot Boxer 2.5Tdi Autosleeper.
Previously:
1984 244DL, Manual, Beige.
1987 744GLE, Manual, Green.
1991 960 3.0 24v, Auto, Silver.
1994 940T Wentworth, Auto, Blue.

newold440
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Post by newold440 » Tue Jul 01, 2008 11:16 am

Thanks for the quick reply bob. Will be giving it a try tonight.

Cheers



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billofdurham
MVS Moderator
Posts: 6507
Joined: Thu Feb 02, 2006 3:31 pm
Year and Model: 855, 1995
Location: Durham, England
Has thanked: 0
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billofdurham

Post by billofdurham » Tue Jul 01, 2008 12:57 pm

Cheers, you are welcome but Bob's my uncle.

Bill.


Work was good - retirement is better.

1996 850GLT 2.5 20v Estate Manual.
1995 Peugeot Boxer 2.5Tdi Autosleeper.
Previously:
1984 244DL, Manual, Beige.
1987 744GLE, Manual, Green.
1991 960 3.0 24v, Auto, Silver.
1994 940T Wentworth, Auto, Blue.

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