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My V70 1999 2.4 Sounds like a Tractor - why?

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

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bluebossa
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My V70 1999 2.4 Sounds like a Tractor - why?

Post by bluebossa » Thu Apr 06, 2017 4:54 am

Anyone heard similar to this before and can point me in the right direction?

1999 V70 2.4 SE - UK
2008 XC90 V8 4.4 Executive - UAE

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oragex
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Re: My V70 1999 2.4 Sounds like a Tractor - why?

Post by oragex » Thu Apr 06, 2017 6:18 am

Could it be a very loud serpentine pulley? Such as the a/c one. Does the sound go away without the belt (you can run the car at idle 1-2 min without the belt on). Another way to locate a noise is to use a 2-3ft tube (I use a shower hose) and carefully approach one end to the engine while listening to the other end at the ear.

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Re: My V70 1999 2.4 Sounds like a Tractor - why?

Post by Darkfleet » Thu Apr 06, 2017 6:32 am

Sounds like maybe your exhaust header is cracked?

When cold pull the heat shield (1 bolt) and start it and feel for leaking air at the side of the head closest to the firewall.

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Re: My V70 1999 2.4 Sounds like a Tractor - why?

Post by bluebossa » Thu Apr 06, 2017 11:25 am

Thanks but goes away after revving to 2k?
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Re: My V70 1999 2.4 Sounds like a Tractor - why?

Post by scot850 » Thu Apr 06, 2017 11:40 am

I would suggest one of 2 things:

1) Cracked exhaust manifold or failed gasket or broken flex-pipe in the downpipe. Rev'ing may just cover this issue.

2) More concerning may be lack of oil getting to the head. Raising engine speed may just increase oil flow to starved top end. Try running a thicker oil to see if it helps. The issue may be the oil pan 'O' rings have failed not allowing oil pressure to the head until higher revs.

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Re: My V70 1999 2.4 Sounds like a Tractor - why?

Post by June » Thu Apr 06, 2017 4:32 pm

Sounds like a bad crankshaft pulley balancer. I heard the same noise on 2 family Buick 3800 engines and a friend's Ford and in all 3 cars the balancer had broken lose of the pulley the serpentine belt runs on. All 3 cars only made noise when idling and noise went away when rpm was increased. All 3 cars were normal after replacement and all three balancers had the rubber bushing between the balance weight and pulley was gone also with the engine off you could hand move the serpentine belt a few inches back and forth by hand between the stop pegs. Worth checking, June
My Volvo cars owned
1989 740 GLT ordered
1994 850 4door standard shift ordered
1996 960 ordered
1998 S90 ordered totalled after 3 weeks
1998 V70 GT dealer stock car
2002 S80 T6 ordered totalled
2004 S80 T6 dealer stock car and current car owned

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Re: My V70 1999 2.4 Sounds like a Tractor - why?

Post by bluebossa » Thu Apr 06, 2017 7:01 pm

June wrote:
Thu Apr 06, 2017 4:32 pm
Sounds like a bad crankshaft pulley balancer. I heard the same noise on 2 family Buick 3800 engines and a friend's Ford and in all 3 cars the balancer had broken lose of the pulley the serpentine belt runs on. All 3 cars only made noise when idling and noise went away when rpm was increased. All 3 cars were normal after replacement and all three balancers had the rubber bushing between the balance weight and pulley was gone also with the engine off you could hand move the serpentine belt a few inches back and forth by hand between the stop pegs. Worth checking, June
Thanks June - sounds promising... will check and report back
1999 V70 2.4 SE - UK
2008 XC90 V8 4.4 Executive - UAE

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