Hello , I'm new on this forum, I have some "problems" with my slant six and I try to fix them, but I think my engine is siezed, because, the starter engine can't move them only "try", my battery is new, I was change the engine oil and some other things (spark plugs , distributor, coil), the engine run during a days and no "blue-smoke" on the exhaust, no bad compression (i think) , the starter engine as new I buying on a mopar, because my old starter engine have the same problem, and now I think this a internal problem with my engine,
How I can procedure and fix them?

_________________
That consume your mind, that's controlling your life

Try pulling the spark plugs, then see if it will turn with the starter. If not try turning the crankshaft by hand (make the belt very tight and turn the fan, or put a wrench on the bolt in the end of the crankshaft if it has one). If you can turn it by hand there may be a problem with the starter installation.

_________________
Dave

1977 d-200 crew cab ex-army pickup wants it's /6 back
1962 Valiant 2 door, 170, three on the tree
1972 d-100 parts truck
80 volare wagon now a parts car

I do, and the engine is seized, I take off the piston heads, and I'll drain the oil engine and take off the oil pan to see the crank shaft, I think this is the failure, because i'm not see any failure on the piston cams, what you think? I have a possible failure on my Camshaft? or the crankshaft hardware? possible piston ring failure? I have now my engine on 1/2 engine status, only the block, pistons, camshaft and crankshaft i'm try to do some thing whit this, my first time to "adjust" my engine... what you thing?

thanks for reply nuttyprof

_________________
That consume your mind, that's controlling your life

You say it was running then, it suddenly started acting like it as stuck?
Have you checked the timing set?, the chain might have broke and bound up.
good luck

_________________
85 d-100 HEI 2BBl
06 Toyota Corrola

Hi Carl, not revised the timing chain, but is not supposed to when I remove the heads, remove the rocker arms should swing freely the pistons? untested try to turn the pistons from the crankshaft pulley, but so theoretically should not turn? but one more thing to note is that the valves if they tried to make the move to open and close, I will review that, but I suspect it's my twisted crankshaft which is a rod or something ... what is the price of a crankshaft on mopar performance? or I can change it once and for a better one?What you thing?

_________________
That consume your mind, that's controlling your life

OH, MY!
You say your crankshaft is twisted? Does this mean you got the oil pan off and can get a good look at the bottom side of the engine?
If it's truely twisted, can you possibly show a picture?

Roger

Hi NspireFX. To find the real cause, you need to be like a detective or medical doctor. Find out all the information you can before you decide what is wrong. Otherwise, you might buy a new crankshaft when you don't really need it. At this time, maybe you can post some pictures. It doesn't make sense that the engine was running well, and then the crankshaft just twisted.

HEY! hello my brothers of the Adeptvs Mechanicvs, I'm here again, I take some pictures of the block and the heads and I see more things "wrong" because, more ash in the combustion chamber, the piston... just look that, the springs and the cam shaft have a good aspect, the gasket on the block and head it's looking good, but, I unknow, I need to watch my crankshaft, but I need at last wait to saturday to do the job, because I'm working on the week, and I'm not enoug free time to do that. But, What you thing? I thing I will need clean and Adjust my engine XD I can upgrade my engine with other pistons? I love doing that, because with these problem I'll change some stock pieces

_________________
That consume your mind, that's controlling your life

Slant Six Dan and other sages - what's the skinny on our Mexican friends dished pistons?
Never seen such a thing on (in?) a Slant over here in Oz !
Make for ultra low compression would'nt it?

regards,Rod

those look like kb-silvolite.com #1294 low compression 7-1 truck pistons.

That is correct, for export engines there is an option in the part book on forged crank engines for a dished piston for lower compression.

-D.Idiot

Thankyou DI,and 1969ronnie,my education has improved another step.

regards,Rod

Hey my brothers, Ronnie you are right, here in mexico, the "mechanic" extract the damaged pieces and find other ones on the junk yard, these is the problem on the engine, more pieces don't are the orginal, teh engine is from a Duster 1974, the engine need at last 8.1:1 compression rate, but I'm going for the 10.1:1 or more, I see on the net these pistons Part No. wispt112h25 from Wiseco Pro Tru Automotive Pistons I thing I will buy them, and so what you say? I can convert them to fuel inyection? .

Nspire

_________________
That consume your mind, that's controlling your life

I'm not a huge engine builder, but it seems like you should increase the cylinder diameter by having a machine shop hone the cylinders a small amount. First have them clean and inspect the block to make sure it is good. Then you can get the next size larger pistons, and be more confident that the problem that seized the engine will not occur again. When the new, better pistons are assembled in the block, you can measure the exact volume of the combustion chamber to get the compression you want. Good luck, neighbor!

hi nspire, looking at the pictures shows that those pistons are stamped .030 oversize. you cant use the wiesco pt112h25 pistons which are 3.425 bore in a 3.430 cylinder. you will have to go to the pt112h45 pistons to get a 3.445 .045 oversize piston. ronnie