Ive taken on what seems to be an insermountable task. Pulling and rebuilding my b21. Motor has 150,000 miles and i think i threw a rod so its rebuild time. Problem is i have no idea what im doing. Im to the point now where ive got to pull intake and exhaust manifolds but can not seem to get them off even after removing all the bolts from top side and 2 from the bottom of the intake. obviously im missing something. Please help if you can and warn me of other problems to come.Thanks.