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#31
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so im in the process of fixing the slant six and i noticed that the pistons with new rings have a little less than a millimeter of walk is this bad? and i found out that i need to have my crank ground down but its not expensive to do that
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#32
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You will need new rod and main bearings for the reground crank.
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#33
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Before you do anything else finish your disassembly and have someone you TRUST measure everything. I know that can be tough to do, but you will save yourself time and money in the long run.
A mm of movement may or may not be bad, but you have to measure the whole bore to make sure it is round and straight. If you don't have it out, you can not tell if the crank needs ground or not. Sometimes they can simply be polished and be fine. Patience is your friend. |
#34
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well i know it needs to be ground as i can feel the groves and see them i got it micd and it can be fixed its going to cost me 150$.
but i have one problem i checked all the compression and all was good accept one cylinder had 0. so i did a valve check and put my air compressor through the spark plug hole and all the air came out the carb. so i took the head off and found that none of the valves were stuck now can re grinding the valves to were they are smooth help seal the leak? as i think that the valve is just not sealing itself all the way when its on completley |
#35
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Lay the head with the ports up and pour water down the ports. If the valves are sealing good they will hold water. If not, you need a valve job.
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#36
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Who put the "3/4" cam in? Who was the cam Manufacurer? Was the cam properly centerlined? Did they use the Mopar offset keys? There are so may things that can affect total timing on the engine. Disconnect all vacuum lines, plug all ports and get the engine right first. Once you know that is right, you can adress all the other problems you have. Get some manuals and spend the time to read them. Teach yourself. Troubleshooting is a skill.
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#37
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so im not sure still learning what are the offset keys ?
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#38
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The offset keys are just that. The standard keys are simply keys. Offset keys are keys with an offset. This allows you to change cam timing. What is being suggested is that your cam timing is not set correctly, and that part of your problem might be that someone used an offset key. It sounds like this engine has had some modifications to increase horsepower. This means that someone with not much experience can run into confusion.
It might be best to tear it back down and measure everything, including bore, piston sizing, rings, valve stems, valve guides. The engine might have been run with valves hitting pistons, thus bending valves. If that happened, it would explain stuck valves. And that would probably mean new valve guides and new valves where necessary. Piston damage would also mean new pistons. And it would mean that the cam lift and/or cam timing might be too much for those pistons. I'm thinking that previous work might have been more than a little haphazard, which would reinforce the idea of starting from scratch. This could be a terrific learning experience, since you would have to figure out just about everything about an engine. |
#39
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vince23 My name is Glenn E. Cozad and I did get your reply about "what are the offset keys?" Depending on how much time you want to invest in knowing about this motor and what is happening and why, I would be more than happy to extend my help. Please understand, I will have you start with basics to find out what you have and go from there to basic diagnostic, "shade tree", tactics that are old but still work. Let me know. Thanx, Glenn.
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#40
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okay so i put everything back together i have it running but every time i put it into gear it stalls. i know that my brothers Chevy cavalier has converter lock out switch and we unplged it and it stopped stalling is there anything like that on my car?
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#41
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No.. unless its had a later model trans installed... Sounds more like a tuning issue, whether carb or timing will need more to diagnos
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#42
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i know it has a new trans in it and there are wires coming from the transmission but ill try adjusting the carb and the timing some more . but my car is still only wanting to run with it retarded
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#43
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I think it's time to make sure the timing is right. Turn it until timing mark is at TDC on the number one compression stroke. Then make sure rotor is aligned with number one contact on distributor cap. I am thinking you will have to pull distributor and put it back in to do this. If you have points, advance distributor until points are starting to open. Make sure you know which direction advances. If you have an electronic pickup, align reluctor tooth with projection. Then start it, let it warm up and set timing with light.
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#44
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okay so i got all of my cylinders to have the exact equal amount of compression (150) and i did the tree test timing now i take it on a test drive it has alot more power than the first run but still feels like its lacking some power. now could this be as i do not have 100% of the vacume lines hooked up and i was also wondering if having a bad universal joint (replacing tomorrow) will cause it to lack power? what else could i be missing ive ajusted the carb as well and it got more power.
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#45
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never mind i got all of my dusters power and she is finally running great!! taking her on a drive tonight and i will let you all know how that goes. letting the leaning beast out of its cage!
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#46
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Duster
I am agree with you..
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