1993 4Runner got very hot ,Motor will turn over but won't fire. I was told could be timing belt? Any thing else???

25

Asked by Sep 22, 2012 at 10:47 PM about the 1993 Toyota 4Runner 4 Dr SR5 4WD SUV

Question type: Maintenance & Repair

Like I said motor got very hot to where it died.After cool down motor seems to turn over fast but does not fire!!
Iwill need to get it started to check for blown head gaskets right??  What is the sign to replace motor as repair??
The truck has 130,000 in real good shape!! CAN I SAVE HER DOC.??? At low cost????

2 Answers

3,335

Unfortunately if the motor turns over fast, there are two reasons, one, the camshaft locks up in the cyl head from being so hot and then the timming belt usually jumps a few teeth if not breaks. The second reason is much worse. If the motor gets really hot, the rings on the pistons get so hot that they loose there tension and can "shrink" resulting in no compression, it will all become just "blowby", and that usually means scored pistons and cylinder walls, and will need a complete overhaul. WHY DID YOU KEEP DRIVING! mine has 281K miles and all original drivetrain, my other has 202K and I beat the crap out of it.

20

I dumped my V6 in favour of a Lexus 4.7 V8. My V6 was grossly underpowerd ( bought new) and had a professional mechanic who specialises in engine transplants. Had to fit a 3.0 litre Turbo Diesel Surf radiator with twin thermo electric fans for town traffic. Best investment I ever did. 60% more economical on fuel and LPG plus 200% increse in torque and power. Changed the diffs frm 4.34 to 4.1 ratios and motor turns over at 2100 rpm at 110 KMH with 285/75/16 tyres

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