Vin999
Active Member
a compression test wouldn't hurt to do, check spark plug/s loose thread/noise as well, ..... if you had major head/gasket issues it should show in driving with power down/misfiring.worse i found the hissing sound coming from front head bolt passgr side i put a small hose in ear to find it so i hope its a loose head bolt not a gasket or worse a head but thanks for reply il keep u posted as to what it is