I have a 91 turbo. Pulled the head off because had all the BHG symptoms: muddy coolant, emptying the over flow bottle, excessive steam from exhaust. OEM head gasket was blown at coolant ports on #5 and #6 on exhaust side. Reinstalled Factory hg with ARP bolts @72ft-lb. Still have exhaust gases in coolant and muddy coolant. Any suggestions?