8N water in oil

FrankS

Member
My 8N threw a fan belt and overheated. Started to miss before I noticed any steam from the radiator. Now have water in the oil so plan to pull the head, get it checked for flatness, and magnifluxed, then install a new Fel-Pro gasket. Rebuilt this engine less than 200 hours ago so I"m wondering if I need to put in new head bolts. Waddaya think?
 
Go back with studs with fine thread nuts. [Cylinder Head Studs Part Number 8N6065A] Then grade 8 nuts and hard flat washers. The fine thread nuts will pull harder than coarse thread bolts.

Then re torque when it's up to temp.
 
Steve is right about fine threads pulling better however I just switched to bolts on my 2N. For me was a cost factor as well as knowing millions and millions of cars/trucks have put on billions of miles using course threaded bolts.
How many overheated and used bolts over? Unless they used strech-to-yield bolts my guess is most. 5 years in automotive machine shop and many many resurfaced heads from blown gaskets I don't call anyone asking for new head bolts.
 

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