Mystery Bolt Topic is solved

DeathRex · Post by **DeathRex** » 01 Apr 2018, 16:33

Oil dipstick tube.

Post by **erikv11** » 01 Apr 2018, 17:29

^^ good guess, an easy one to miss when assembling or checking.

Post by **cn90** » 01 Apr 2018, 18:32

- Could be the bolt underneath the Intake Manifold, the bolt holding the oil dipstick.

Post by **abscate** » 02 Apr 2018, 03:51

DeathRex wrote: 01 Apr 2018, 16:33 Oil dipstick tube.

Well done, yes!!

VolvoAffair · Post by **VolvoAffair** » 04 Apr 2018, 00:02

After much advice, and additional diligence, I discovered that the "mystery bolt" attached the oil cooler thermostat to the engine block. At some point in time, this bolt was swapped for the torx and was tapped to accommodate this larger bolt.

Thanks again!!