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Manifold Flex Pipe Exhaust leak looking for Ideas please?

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.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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theWIFES_S70
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Year and Model: 1998 S70 base
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theWIFES_S70

Re: Manifold Flex Pipe Exhaust leak looking for Ideas please?

Post by theWIFES_S70 » Wed Nov 16, 2016 12:19 pm

plumsmooth wrote:
preventing the car from breathing
Has the Volvo had a PCV replacement yet?
PCV is great on our car. I replaced it a year and a half ago and I've only run full synthetic since. There's no positive pressure from the crankcase at all. The engine purrs and hums at 900.

It's exhaust/cat problems for sure. It's all rotted away, there are holes and rust and leaks everywhere. I have a feeling the cat is really bad. I've had two cats go bad before and they sounded similar to this--the instantly loud exhaust noise a specific rpm (on this car it's about the 3Krpm range). If we didn't have that stupid 02 sensor behind the cat I would've just taken off the cat and put a straight pipe back there... But alas!
1998 Volvo S70, N/A, 5-speed, 183K
2007 Volvo S40, 2.4i, 5-speed, 97K

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