blown rod??

ok so i have 1993 s10 blazer 4*4 and with a 4.3L vortec.  today i was driving it and it felt like it had no power. a bit later i went and got onto the higway and i nearly had to floor it to watch my speeddometer snail its way up to 70.  then after about a quik 3 min i started to hear a really lound knocking noise when i pressed the gas.  i pulled of at the next exit and checked the oil etc. the oil was smoking and later when my step dad came up (he used to rebuild and teardown allot of engines before) he said that it is a blown rod..

any suggestions or help would be great!  I will be glad to answer any questions if you have any.

Normally if I had that problem lke with an old car I had I would say get a new enigine.

I agree just get another engine. Check out the wrecking yard. Not worth rebuilding IMHO.

well since im not very um car-smart what exactly do i have to know to get a new engine that fits my blazer?

If you have the CPI motor, another CPI motor is what you need.  Your step dad is mostlikely correct.  Sounds like you spun a rod bearing, most likely trashing the crank in the process.  A used motor is the cheapest route to getting your vehicle back on the road.

sounds like it is time for a 350 swap.

ha i like the 350 idea but how do you get the info to know if its a cpi or not?

i think in 93, it had tbi. but not sure. just look at your fuel injection setup.

well, whats the difference im more of a computer wiz than a mechanic sorry

any local shop can tell you what exactly what you need, but allways get a second opion, just because there are alot of shadey mechanics out there trying to make the easy money.

TBI == large round air cleaner on top of the motor.

CPI == black plastic trim on top of the motor with orange VORTEC lettering.

well mine is silver does that make any differance?

Ok, lets try this again...

Pictures say a 1000 words:

TBI:

CPI:

The 93 will most likely have the CPI in it

thanks guys i owe you so much. Do i need a special engine for the 4*4 part?

No, the 4x4 attaches to the tranny. You will need to reuse your remote oil filter adapter though.

ok thanks again guys do you know what engines will fit in the blazer like a list of them? 305's 4.3L's and what yrs and from what models etc.

if you want to go old school i have a virgin 67 327 (small journal) well was virgin i bored it out 30. it has h beam rods with sealed power pistons. the crank is going to get turned 10. i havent decided on a set of heads. i have a edelbrock RPM intake with a new 650 cfm carb on a 305 that is in my C10 now. i cant decide on a cam either.