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helicoil repair

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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Year and Model: 850 NA 1997
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helicoil repair

Post by jeffsws »


I was recently doing a PCV repair on my 850 and when putting everything back together, noticed a bunch of issues trying to screw the bolts back on. Some of them would screw forever and never tighten. Both of the screws for the oil box and 3 of the screws for the intake manifold. Turning on the car will result in a very rough idle which will eventually stall out. I'm pretty certain it's the vacuum leak at the manifold. But giving it gas will keep it alive...

I bought the following for the intake manifold: ... SwZQRYbRM0

Two of the loose intake bolts are at the top which should be easy enough to get to, but the third problem bolt is the bottom left one, closest to the thermostat. I assume that one will be difficult to get to. Anyone got any advice for that one?

Now for the oil/breather box bolts. What helicoil size would I need to buy? And again the left most bolt is another that will be difficult to fix due to its location. Maybe I'll only be able to fix the right one...

Any help would be great!
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