I was going to do some timing work on the Mav today. I started it and let it idle to warm up. I rev'd it a little to have the engine start to stumble and hear a metallic sound. I shut it off then pulled the valve cover, restarted the engine and watched the rocker arms move. I notice the number 6 exhaust arm stop moving. Then the engine fluttered again and died. Either the lifter is dead or the lobe has worn flat. Just damn! Time to start rebuilding a new short block. Ken
Interesting Joe, I hadn't thought of that. I am now putting together a list of what I need to build another 250. My goal is to build a 250hp 257 I-6. I hope to have it completed by Christmas. Ken
bent push rod? valve caught in the guide? Lifter malfunction? I would unbolt the head and investigate a little. If it's a problem like mentioned above it shouldn't cost an arm or a leg.
sportyfamilycar, I do believe it's a bad lifter. The best way to get the dead lifter out is to pull the cam out and push them from the top. If I am going to pull the cam to swap lifters, I might as well rebuild the 40 year old engine to get it to top performance.This is just an early sign of future failure! Thanks, Ken
Coolvettes, I'll pretend you never wrote that! I have a killer V-8 Ford all ready built and ready to go (396 FULLUP sbf in my basement). But I wanted a challenge and now I have one. I am trying to build a killer 250,and have most of the parts to complete it. My thinking is this, what hasn't been done to a V-8? Turbo, supercharged and nitrous. A log head six is the challenge to me. AK Miller built a couple of killer 6's and I'm thinking I can too. I thought of using LP gas until I found out last week it was $4.30 a gallon. Killed that thought. I am building a long rod 250 with 10.2:1 compression, 3 2bbls, killer cam and the rest. This should be fun. Ken
A lifter remover tool is the easiest and best way IMO. . If you do rebuild; if you haven't already pick up the falcon six performance handbook I would recommend you grab it, has good tips you can pass on to your machinist that can make a more efficient motor from that stubborn log head these sixes have good luck
Thanks sportyfamilycar, Taking a lifter from the top, of a 40 year old engine, has never for me worked. I do have a new Falcon Six Cylinder book. I do plan to do all the head mods plus add 3 progressive 2bbl carburetors. The cam will be a custom Schneider cam. The short block will have 300 rods and Keith Black 305 stroker pistons, KB153-STD. This is worth 10.2:1 compression. If I can't get the results with this combo, I'll swap the head for a CL Aluminum Head and 4bbl manifold. As long as I own this Maverick, it will have a 250 in it. So There!!!! Thanks, Ken
New 250 Ken, Save yourself time and money, buy this motor. http://fordsix.com/forum/viewtopic.php?f=86&t=65735 I do have a 250 rebuild kit, I will sell. PM me if interested, I'll get the spec for you. Thanks, Rick
3 - 2 barrels haha. Sounds like a good plan though for the motor, just stuffing it under the stock hood of a Maverick is the trick. Keep the compression like you plan below 11, as they do tend to start knocking 10.5:1 and up on pump gas.
