89 Volvo 740 TurHigh pitch squeal followed by loss of power

[email protected] · Post by **[email protected]** » 16 Dec 2006, 19:36

i have a 89 Volvo 740 Turbo 104K miles. The turbo started to have a high pitched squeal. I drove it home and just before I got home, It would lose power whenever the turbo would kick on (based on the gauge). Any ideas what to check?

able · Post by **able** » 15 Jan 2007, 12:37

take a look at the harmonic balancer it spins on the inside but the outside ring where the pulleys are is spining at a different rate esp. under load[/b]

chester10 · Post by **chester10** » 25 Jan 2007, 23:46

able wrote:take a look at the harmonic balancer it spins on the inside but the outside ring where the pulleys are is spining at a different rate esp. under load[/b]

If it is like a high pitch squeal then the pump is going bad there might be some water in it. Sometimes the battery leaks acid into it and the acid eats up the pump. You have the same problem as with my dad, i guess replacing a new one would be the best way, that's the only thing he did. Perhaps you should purchase a high quality Volvo 740 Parts. That was what he did when he was in that situation same as yours.

780 bertone · Post by **780 bertone** » 26 Jan 2007, 08:47

check all your intake hoses by that i mean check hoses from intake to turbo check all hose clamps for tight and check hoses for being cracked an intake leak will cause the high pitched noise and definitely a loss of power.let me know what you find.