I have a loud squealing coming from the front of a 3ltr I got last wed, driving it home the noise was very concerning but the guy I got the truck off says it was just the fan belt... After doing some reading on the friday I decided to replace the belt along with the idler pulley assembly. Started truck up no noise for about 15 minutes then it started again, If I spray some belt grip on the belt noise goes away. but then returns either a few hours later or when I start it again. any advice or suggestions would be appreciated. Alternator is near new air con doesn't work but I can see the belt pulley turning. If I spray even the smallest about of lube or anything at the back of the fan so it blows over the belts and pulleys the sound goes away....I'm already regretting swapping my 4.2 for this truck...