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manifold bolt

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, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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manifold bolt

Post by loveMy850 »

Hi Guys, And Happy New Year...... What are the best exhaust manifold bolts to buy, and where... mine keep losing up, a friend told me I need new bolts, Ill go along with that.
then again I was also thinking about hitting one of the yards, my friend told me that if they are super tight then they are probably good,that they haven't been removed quite often, had one hell of a time doing my pvc, and it had to come off twice. stupid lower bracket wouldn't line up and dilemma after dilemma, any ways some please get back to me. Thank you!

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Post by erikv11 »

Happy new year!

Exhaust manifold uses studs and nuts, no bolts. Or locknuts, actually. You can get new studs from any auto parts store just bring in an old one to match it up, re-use the locknuts or get them from the junkyard or buy some new ones at any auto parts store.

Intake manifold uses bolts. If you actually mean intake manifold (the one you took off for PCV work) I'd get bolts from the junkyard if that's easily accessible for you. Get a handful. They are all the same size all the way around the intake manifold. Don't over tighten them however, this is very important. You can use loctite blue on these if they are not staying tightened. Don't use red loctite on intake manifold bolts.

You can also get any of these parts online but that would be slower and probably more expensive. You might be able to get good info on the sizes from an online site, especially IPD gives out good info on nut and bolt sizes for example.
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 293k
'06 S60 R, 167k
'07 XC70, 170k
'99 Camry V6 :shock: 130k
gone: '96 NA 850 210k, '98 NA V70 182k

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Post by loveMy850 »

Thanks, I just went to the JY and did that today. They are all really good intake bolts. Thanks man.

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Post by abscate »

Intake bolts 982788 982778 M7x30 mm

An odd size, so we keep a bagful here at MVS in case a member loses one

On edit, corrected part number
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Post by oragex »

As above, intake bolts are 15 ft.lb (20 Nm) which is not a lot - Volvo has a 'paper' gasket . But I'd say, if they keep loosen up, maybe the manifold need be supported by a lower bracket, I know on later NA there is a lower bracket to the manifold . Without it, vibrations from the engine and low bolt torque will cause them to come loose

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Post by volvo_mania »

Slight correction, I think part number is 982778 (Flange screw M7x30).

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