Old Fashioned

[oldeskewltoy]

If any parts have seen enough heat to turn blue... they are no longer viable parts. The crank might be able to get turned, but only a machinist will know for SURE. I'd STRONGLY recommend a new short block(short block = the entire lower part of the engine)

#2 pistsons - there are 3 sub sizes of standard pistons that came from the factory... yours are subsize #2. This is NOT an O/S piston... Toyota also has those....

Piston crumbling is terminal

Actually #4 bearing is the most prone to failure since it is the furthest away from the oil pump

Keep the engine to "learn on", DON'T reuse anything there in your car!!! At a minimum get a replacement shortblock...


Hmmm also check that photo again... are your pistons raised the tiny bit these are??? Or are yours perfectly flush with no up lift between the valve reliefs

Apolan Wrote:Okay today we opened the bottom end as well and I have found my culprit! The number one con-rod to crankshaft bearing has totally siezed - it actually "grabbed" the crankshaft and was sliding on the outer side - so the friction was between con-rod and the bearing instead of the bearing-cranckshaft. I have never seen that before. Obviously the engine was rebuild before by some of the previous owners as no gaskets were used, only the silicon/gasket material.. not to mention the bolts were tightened on random setting

So couple of questions (hopefully i can get some pics up soon):

1.) Is the crankshaft factory termically worked? Because my crankshaft is a bit blueish where the con-rods are - not in the middle, where the bearing is, but on both sides of the bearing..

2.) Are conrods thermically worked? They are also a bit blueish.

Im trying to work out if thats normal, or if my bottom end is totally messed up and i should just get a new engine..

3.) My pistons only have the number "2" on them and the letter "C". Does that mean they are the standard 81mm? They are exactly like this one (only a very black): http://www.aeu86.org/download/ae86/id/6844

3.1)Some of the pistons are a little chipped on the top edge (maybe 0.5 mm crack/dent.. Is this too wrong?

4.) Is it common that number one bearing siezes? Is this bearing mybe more prone to oil-starvation than the rest?

5.) What could be the reason of seizure? Ithink that just about anything might be the reason, as this engine was obviously not properly built..

Havent taken the crankshaft and the oil pump off yet.. hopefully that will be tomorrow along with some pics.

So what can you say from my description guys? Thanks for all the help!

Regards, sašo