Knocking and now it doesn't start
 

Hey everyone,

I was driving my Supra with my mother the other day and it started to make a knocking sound when I shifted into 4th gear. I kept driving until it became extremely noticeable and then I pulled over. I didn't know what the problem was, but I stopped the car and opened the hood and let it cool off. With the original 7M-GTE engine in it I think it over heats a lot. Anyway I ended up waiting about 10 minutes and then I began to drive it. Then the knocked returned and it was even louder than before. I was about 7 miles from home and I started to drive back. It got so loud and when I would shift up the car would shut off while driving. Power braking, steering, everything! So I only ended up getting 2 miles before I head a pop and then the car just died. I was able to roll it into a parking lot and when I opened the hood, green radiator liquid was slashing all over the place. I didn't get any into the engine but my inter cooler was soaked in it. It leaked all over the place and I ended up walking home. I ended up towing it home where it leaked in my garage, I think it even leaked oil.

So could someone tell me what they think happened to it? When I try to start it, it makes a short click and doesn't even fire. Did I blow the engine or is it something to a lesser extent?

Any input is greatly apperciated, Thank you

Doesn’t sound good, knocking noise and loosing fluid sounds like BHG and big ends both together. The fluid on the intercooler could be the expansion bottle over flowing due to over heating. A few things you need to do first;
1. Check the engine oil level.
2. Remove the oil filler cap and check for any white residue in the cap.
3. Remove the spark plugs and try and turn the engine over using a spanner on the crank pulley.(turn clockwise)
4. Remove the oil filter, open the end up and check for any bearing parts in the filter material.
5. Report back with you findings.
The knocking noise is the main issue and the fact it now sounds if the engine has seized.

Okay thank you, well how expensive would it be to turn my engine over? I don't have any money at the moment so this might take a while to do.

oregojoe is in the process of a total rebuild (see Link) probably the best person to answer your question. If the engine has seized then you’re looking at a replacement crankshaft plus the work oregojoe has done. Did you try any of my suggestions ?

I checked the cap but there wasn't any white residue there. I don't have the tools or equipment to check any of the other things you proposed. At least not yet.