this is the bads. I imagine the truck is going to my local Toyota guru for diagnosis but I thought I toss up a thread for input.

89 toyota 22re. went to do the timing chain job and found the head gasket was blown.

job done tonight, all fluids topped and went to start it tonight. started up nicely, idling WAY to fast. shut it off within 10 seconds, knocked back the idle. restarted. ran nice for 10 seconds then instantly developed a BAD rap, not a tick, a rap in the top end.

I listened to it, shut off, started again a couple of times then contemplated for 5 minutes.

went to start it again and it won't turn over. starter whines but no engine turn over.

what should I do to try and diagnose from here?

Thanks,

Pete

 

A loud rap....Did you pull the distributor? If so, did you mark the position of the rotor so it was lined up properly upon reinstall? Did you mark and line up the cam and crank gears upon reinstall? If they moved out of position during teardown or reinstalll, your valves could be toast. The 22R is an interference engine. The noise you heard could have been the valves and pistons colliding if the engine was significantly out of time. Just some guesses on my part. Hard to tell without tearing it down.

 

I set TDC and marked the distributor. before it went toast I had time to spin the distributor and it seemed to be sitting pretty where it was.

And the only thing that makes me wonder is that it ran nice and purring perfectly for a while before suddenly rapping.

The only thing I cameup with overnight was maybe the oil pump went caput and quit delivering oil to the top end. How would I check to see if it is oiling? The oil pump seems to be a fairly mechanically item. Don't see how it would not deliver oil.

If that was the case it may have seized. But it wasn't very warm, any way to check that? try to turn the crank? drop some oil in the plug holes and let it sit?
Thanks,
Pete

 

keep in mind that if your head gasket had been blowing out for a while, when you replaced it, the added compression may have made a loose wristpin really let you know it's there.

also had a nasty rap under loads after a head gasket -- turned out to be a busted valve guide.

 

alrighty, today was fun. started early, got the head and timing chain cover off. I like scraping fresh gaskets, they come off nice

figured it out, the first 2 jobs I did of this nature I got right, just wanted to say that. this one i left the bolt holding the cam/distributor drive gear on probably somewhat less than finger tight.

so the cam gear backed off, fell down, the bright tchain link jumped 7 teeth counterclockwise on the cam and crank.

RAP !!! was valve hitting piston. #1 & #3 have a slight nick in them. valves themselves show no sign of impact. rocker arm clearance was normal prior to head removal.

freak ... there was 1/2" of coolant in #2 & #3 cylinders when I pulled the head.

I just happened to have a spare tchain and head gasket kit here. I've got a spare head as well that came off a blown 94 I bought.

I'm going to have original and spare head pressure tested. if spare head is good, then it's going on. I usually only wrench on weekends, so next saturday I'll spend another 1/2 day and put it back together and hope that the interference didn't screw anything else up.

Thanks,
Pete

 

Good job locating the cause of the problem. At least you know what happened. Thanks for posting your findings.

 

This was a great lesson. I have a meticulous process, clean organized shop and I generally am not an idiot.

But holy sufferin am I ever going to pull out all stops to minimize distractions and stay the freaking course on these jobs in the future.

I had the head pressure tested today and am reassembling the engine tomorrow night.

93 toy pickup, you nailed it without even being here thanks for the advice.
Pete

 

Good deal...thankfully you realized something was wrong and shut the engine down after less than a minute. That definitely saved your engine. You will be further ahead and more cautious in the future ...just like the rest of us when we do something similar!
A mechanic I know recently pulled a front wheel on a vehicle that was getting ready to be driven to the auction. He forgot to torque the lugs back on and only finger tightened them. Later, on the way to the auction, the driver of the vehicle apparently thought the vibration in the front end was normal. It got worse and worse...and the front wheel came off and jammed up in the fender well. Long story shortened..I bet he doesn't do that one again!

 

Thankfully I got the engine back together Tuesday night and started it up last night. ran it for 20 minutes or so and it appears to be running smoothly.

I have instituted some major distraction control measure rules in the shop. some double checking rules etc.

Great learning experience.

Thanks for all you help and posts.
Pete