1st time building a 4.9l 300
#1
1st time building a 4.9l 300
I'm fixing to try & build a straight 6 for my 89 bronco. its not carbed so what i seen so far tells me I'm limited. I'm going from the ground up & know ill have to go with bigger pistons (light rust on the walls in the block). I'm planning on using the crankshaft in it but want to move up with the cam (just don't know witch one yet) new push rods, lifters. thinking keep the valves. port & polish head, grind & cleanup upper & lower intake (maybe a bigger tb later.....my biggest thing at the moment now is finding a cam,push rod & lifter setup that works the best. any ideals?
#2
You are in the right place...just keep on reading and taking notes. Try here too: FORDSIX PERFORMANCE • View forum - 240-300 "Big Block" Six Performance
#4
#6
If I were you, I'd do a search in this forum on 'rebuild', and start taking notes (copy and paste) into files, so you have the info when it is time to start buying and machining.
Tips: Buy the Felpro 'heavy duty' head gasket. A lot of the kits you buy will have off brand names. Get the head gasket separate. Felpro makes 3 ratings for your engine. You want to KNOW which one you are getting.
2.) Have the block and head magnafluxed before any work is done. That will tell you if there are any cracks.
3.) buy the little 'sleeve' with the timing cover kit. It insures a good seal on the crank, where it goes through the seal.
4.) most cam makers also sell a head/valve train kit with the cam. Get it. You don't want to mix and match here.
5.) Spend a little bit more $ and have the lower end balanced if you are going to keep the engine.
6.) spend $30 and wire wheel EVERY bolt. Keep everything clean as a fricking hospital. I mean it.
7.) read about everything before you do it.
Good luck.
Tips: Buy the Felpro 'heavy duty' head gasket. A lot of the kits you buy will have off brand names. Get the head gasket separate. Felpro makes 3 ratings for your engine. You want to KNOW which one you are getting.
2.) Have the block and head magnafluxed before any work is done. That will tell you if there are any cracks.
3.) buy the little 'sleeve' with the timing cover kit. It insures a good seal on the crank, where it goes through the seal.
4.) most cam makers also sell a head/valve train kit with the cam. Get it. You don't want to mix and match here.
5.) Spend a little bit more $ and have the lower end balanced if you are going to keep the engine.
6.) spend $30 and wire wheel EVERY bolt. Keep everything clean as a fricking hospital. I mean it.
7.) read about everything before you do it.
Good luck.
#7
You lifters and cam are married. If the cam is changed, the lifters are tossed, trash. You can reuse your old push rods. Clean everything!! blow air through them.
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#8
#9
It is rare for a block to crack, but still it does happen. Usually the head will crack if over heated. Magnafluxing eleminates any guessing. If you do need a new block, check Craig's list, or pull one yourself at the bone yard. I think you can get one for about $150. But before you strip down the new junkyard one, find out from the machine shop whether or not your crank can be reused.
Get a block with the same style oil pan, sump in the same location, dipstick in the same place.
Get a block with the same style oil pan, sump in the same location, dipstick in the same place.
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