mattyb Donating Members 1,097 Member For: 16y 8m 1d Gender: Male Location: Gold Coast, QLD Posted 07/02/10 06:46 AM Author Share Posted 07/02/10 06:46 AM Okay, the engine is out, upside down, and the sump is off. I’ve attached some pictures for you all to have a look at. Here is what I found.-Bent #3 Rod -Crank is hitting on the bottom of the #3 Piston-#3 Rod had Gouged RHS of the Cylinder where it's hitting-#3 Rod has contacted the LHS of the #3 Cylinder and had broken small chunks out of block.(#3 cylinder had only 130psi when compression tested, and #4 & #6 were about 165psi and 175psi also, so am checking them shortly.)My next question is, what would you guys do in my position? Unfortunately I’m not in a financial position to buy an atomic short motor otherwise that would be my first option. Are the FG F6 motors a good option? I’ve heard of a lot of people running really good numbers reliably from them.Are there any other options for short motors other than Atomic and Ford?Cheers. Link to comment Share on other sites More sharing options...
RUS531 RUS531 Donating Members 410 Member For: 18y 5m 27d Gender: Male Location: Emerald QLD Posted 07/02/10 07:33 AM Share Posted 07/02/10 07:33 AM OUCH! Just what we expected hey mate? And the hitting on both sides of the block would explain why the tempo of the knock was high. If you dont want to go hunting for anymore power I would just go the later ford short engine dude Link to comment Share on other sites More sharing options...
mattyb Donating Members 1,097 Member For: 16y 8m 1d Gender: Male Location: Gold Coast, QLD Posted 07/02/10 07:44 AM Author Share Posted 07/02/10 07:44 AM The knocking ws actually the crank hitting the bottom of the piston. My view on it was the initial knocking I heard that disappeared (when I was overtaking the truck) was the rod hitting the side of the block, then the knocking went away, and I'm guessing the next time I overtook, I bent it more, and that knock was/is the crank hitting the underside of the piston. The knocking in the video was the crank hitting the underside of the piston, hence why we couldn't turn the crank that day to leak test it. I'm going out on a limb and thinking that the reason #4 is down on compression could possible be because the crank is bent, warped etc. Link to comment Share on other sites More sharing options...
straughsberry Donating Members 1,846 Member For: 17y 5m 28d Gender: Male Location: Broady, Melbourne Posted 07/02/10 07:55 AM Share Posted 07/02/10 07:55 AM Sorry to hear.I'm not sure of the advantages of the FG short versus the post 06/06 BF or Typhoon motors. The FG uses the same rods according to Ford. They have the same part number. Maybe someone in the know cares to comment about the FG vs post 06/06 BF short?How much power do you want to make? I'd grab a Ford short and throw in some rods for safety. Depends on how much you have to spend. If you need rods, PM me. Link to comment Share on other sites More sharing options...
RUS531 RUS531 Donating Members 410 Member For: 18y 5m 27d Gender: Male Location: Emerald QLD Posted 07/02/10 08:29 AM Share Posted 07/02/10 08:29 AM I'm no expert but I would have thought if the crank was bent or warped you would have huge vibration issues and all the main caps and bearings would have went on one hell of a ride. Link to comment Share on other sites More sharing options...
gravelrash Member 211 Member For: 22y 1m 13d Gender: Male Location: Dalby, QLD Posted 07/02/10 08:41 AM Share Posted 07/02/10 08:41 AM I'm no expert but I would have thought if the crank was bent or warped you would have huge vibration issues and all the main caps and bearings would have went on one hell of a ride.exactly what Cameron said. the crank would be one big skipping rope. id say the only casualties of this war was the rod, piston and block. Link to comment Share on other sites More sharing options...
ebxmple Member 1,322 Member For: 17y 16d Posted 07/02/10 09:05 AM Share Posted 07/02/10 09:05 AM The FG shorts have different pistons but the same rods. Apparantely a better piston but only what I have heard. Theirs a couple of BAs and BFs that have been fitted with an FG short and coping well with between 350 and 390rwkw. Link to comment Share on other sites More sharing options...
mattyb Donating Members 1,097 Member For: 16y 8m 1d Gender: Male Location: Gold Coast, QLD Posted 07/02/10 10:04 AM Author Share Posted 07/02/10 10:04 AM (edited) exactly what Cameron said. the crank would be one big skipping rope. id say the only casualties of this war was the rod, piston and block....and the crank, if it's hit the piston once every rotation since it bent, I'd say the crank's had minimum 20000 hits on the piston (one every revolution since, remembering I had to drive the car for 10km's, and the car was started and run for everyone to make their diagnosis), at best it's gonna be out of balance.We're gonna strip it, and see if the block is salvagable, I'll crack test it, and check the cylinders integrity, and we'll take it from there. Who knows, might just bore the f*ck out of it and make it a 4.3L Edited 07/02/10 10:05 AM by mattyb Link to comment Share on other sites More sharing options...
mattyb Donating Members 1,097 Member For: 16y 8m 1d Gender: Male Location: Gold Coast, QLD Posted 09/02/10 03:08 AM Author Share Posted 09/02/10 03:08 AM Chatted with Dave last night and we have come to the conclusion that... Well we need to strip the motor further to determine the cause. Dave brought it to my attention that the initial knock I heard was probably detonation, which would explain a LOT. So tonight we'll get to the top of the pistons and see what's happened there. Am I better off pulling the head off, or removing the crank to have a look at the pistons? Either way the crank has to come out, and the head has to come off, just wondering which one is easier? Link to comment Share on other sites More sharing options...
BensXR6T Member 478 Member For: 16y 1m 9d Gender: Male Location: Burpengary QLD Posted 09/02/10 12:44 PM Share Posted 09/02/10 12:44 PM Easier to remove the pistons through the top of the engine. Bad luck mate, has the other half moved you into the dog house yet? Link to comment Share on other sites More sharing options...
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