What is the torque spec on a Ford 300 straight 6?

Answer 1

Hello, I can offer what I have for free as others don't want to open their greedy mouths to let anyone know a thing. I have been a mechanic for years and do not mind helping anyone but there are those that will censor advice even if it saves others money and assistance. Here is the spec for 1977 through 1984 on the Ford 300 or so called now the 4.9 engine according to my book: Cylinder head bolts: 70-75 lbs. The sequence is drivers side starting on bolt one (fifth bolt in line of bolts or center of line of bolts)and going straight across to bolt 2 on passengers side and then to the side of bolt 2 is bolt 3 and back across to bolt four to the right of bolt 1. This is done in a zig -zag pattern until all bolts are torqued to recommended torque.

segon s version

rear front

13 9 5 1 4 8 12 torque specs are in three steps

11 7 3 2 6 10 14 1) 55lbs 2) 65lbs 3) 85 lbs

all info from the book

Please specify which bolt you are torqueing. In short, you should invest in a Chiltons or Haynes manual for the year you are working on, about $20.00, and well worth the price. They have all the torgue specifications on all parts, but if it says 10 ft/lb for the torque spec for the transmission bands...don't! Sometimes, rarely, there is a misprint.

My information was taken from a Chilton's manual ISBN: 0-8019-7357-0 Part number 7357 for the torque on the 300 six cylinder engine head bolts.

I feel that if a mistake was made in the torque it would be a fault in Chilton, not me. I know for a fact that even the best instruction manuals lie or mislead. I know of one that does not relay all the crucial information on the 1998 2.7 Dodge Intrepid's timing chain tensioner. In that case of installing a timing chain on that engine one must beware of the chain jumping off the crankshaft gear due to not having the oil pressure built up into the tensioner to hold the chain initally tight. In order to reduce this damage happening one must hold a lever against the chain tensioner arm pushing against the chain and roll the engine over with the starter until pressure is built up and stored in the tensioner. Hold the arm tight to the chain while cranking the engine over and over. No book will tell you this and most cases intake valves will be bent if you aren't very lucky. This little help is worth at least 2000 dollars for not having to redo the heads. Just another one of those engineers that know it all and print it.