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'98 V70 T5 Knocking sounds

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

Aphx02
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Year and Model: 1998 V70 T5
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Aphx02

Re: '98 V70 T5 Knocking sounds

Post by Aphx02 » Sun Aug 05, 2018 9:26 am

JimBee wrote:
Fri Aug 03, 2018 5:56 pm
A bearing that is worn enough to cause a knocking sound should be dropping oil pressure. At idle is your oil pressure light coming on?
No, which I hope its not internal. I'm checking for any exhaust leaks by the turbo, and inspecting the belts as well.



sventastic
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Re: '98 V70 T5 Knocking sounds

Post by sventastic » Sun Aug 05, 2018 3:33 pm

Aphx02 wrote:
Sun Aug 05, 2018 9:23 am
Very similar, but I hope its not that. I'm starting first to check for any exhaust leaks by the turbo, checking my belts, and changing my oil to see for any sediments left behind from a worn bearing.
I hope so too. I should have given more backstory, as I'd be rather surprised if yours does indeed have rod knock especially since the oil level is normal and it seems there weren't really any symptoms beforehand. Just odd that it sounds similar. My car ended up about 3L low on oil (unexpectedly burned over a regular oil interval) and began with what sounded like lifter tick, which turned into a knock.
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Aphx02


1996 854R | M56H | 16T | 259k

precopster
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Re: '98 V70 T5 Knocking sounds

Post by precopster » Mon Aug 06, 2018 12:42 am

I had rod knock on my original 2001 T5 engine and I ran it until the rod smashed out through the block-no oil pressure lights at all. I hope it isn't a rod or main bearing
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Aphx02


Current cars:2002 XC70, 2006 Ssangyong Rodius (Stavic), 2006 XC90 2.5T, VW Transporter 2.5TDI

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Aphx02
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Re: '98 V70 T5 Knocking sounds

Post by Aphx02 » Mon Aug 06, 2018 7:06 pm

Update: So I left it running for about 15 minutes, and afterwards, that knocking sound is not heard anymore. Could it be exhaust related that it expands possibly at the exhaust manifold? I've started though having a plan b, c and d. Plan b, buy a used engine. Plan c, have the engine rebuilt or plan d, do it myself, and that would entail cams/ported head, and may get out of hand. I used to road race in 85 Corolla GTS and a 02 SER Spec-V, both vehicles fully built, engine and suspension. The Wagon is my next 'road wagon', at Willow Springs.



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RickHaleParker
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Re: '98 V70 T5 Knocking sounds

Post by RickHaleParker » Mon Aug 06, 2018 7:47 pm

"Could it be exhaust related that it expands possibly at the exhaust manifold?"

Yes it is possible. Build a smoke machine, blow smoke up it's waste pipe, see where the smoke comes out.
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Aphx02


Platform: P80 1998 C70, B5234T3, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
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Aphx02
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Re: '98 V70 T5 Knocking sounds

Post by Aphx02 » Tue Aug 07, 2018 8:19 pm

Update: So that knocking has definitely gone once its warmed up and running. I've already went ahead to purchase an exhaust manifold gasket along with a V70R manifold...Found a couple under 120.00 so I'm purchasing one and I already catalogued cams, piston, block for my stage 3. Here's the vid:



scot850
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Re: '98 V70 T5 Knocking sounds

Post by scot850 » Tue Aug 07, 2018 11:15 pm

I have heard of some owners complaining of cracked exhaust manifolds. Good luck!

Neil.
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Aphx02


2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

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Re: '98 V70 T5 Knocking sounds

Post by scot850 » Tue Aug 07, 2018 11:16 pm

Should have added, you should also check the flex down pipe as they also break with age.

Neil.
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Aphx02


2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

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