Ha! I’ve done this too on an early Toyota SOHC.
The chain locking wedge tool can slip upwards.
Then for me, it was no longer a quick easy head-off reseal. But pull down the whole front of the engine.
Fortunately I’d learned with timing chain/belt disturbances a fellow should by hand turn the engine over a full two 360 degrees and reverify the timing alignment marks.
Surprising how many times even with care they are off then once all slack is taken back up.
Re-set and try again.
Many of the tensioners are very tricky. Or defective sticky.
S.U.
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I wish I brought the phone/camera to the woods today. I haven’t had an intake event in a long time, but today I experienced a major one. I was only a couple hundered yards into the return trip and I was still on gasoline to pullstart the gasifier. Suddenly a severe valve noice. The engine started to puff and spatter and a big cloud of blue smoke was visible in the rear view mirror. It was getting dark and when I got out of the truck to open the hood and check the manifold heat, I noticed sparks where flying out of the exhaust down on the snow covered ground. The engine kept puffing and sparks where flying for about two minutes and then all of a sudden back to running like a sewing machine. Cleanout completed.
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Good thing it happen in the woods and not in the city. Well you are good for many miles of good running on wood. BBB event competed.
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That’s right, Bob. Only birds and squirrels were watching my fireworks and now I dare drive into town again 
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JO , this report reads like a Christmas story with a happy ending, first of all a dramatic beginning somewhere in a snowy dark forest, sparks, smoke, noise, well, … but a happy ending and a return to the warm hearth… 
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Yes, not something that would happen to me. The car would have died immediately in the middle of nowhere without any help.
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That makes my day. A day without a laugh is a lost day.
I would say vans is what is used overhere. Open or closed. On the farm just tractors. But useless to mention after Kristijan. He is so right.
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Nothing but a regular commute.
Rock solid condensation tanks and hayfilter, all guages frozen or out of order except the main vacuum, but he truck and gasifier don’t seem to mind.
Two more nightshifts to go and temps below 0F are forcasted. I guess @BillSchiller and the Canadians would still call it mild though.
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You are tried and true JO, a experienced driver on wood gas. Only one of the gages is working, the vacuum. Driving with the condensation tanks frozen, the hayfilter will thaw out soon driving to work. Using the other 75% of the DOW.
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THANKS for the ride in the mazda truck with out any gasoline.Nice country side out your way of travels, you got more winter than us out here in michigan–we got snow on ground about a day and then it melted. We probley wont get that cold till end of december this year it forecasting any way.HAPPY WINTER TIME from us too.
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JO
I had to stand by the heater while reading your post 
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Do the gauges start working after everything warms up?
We’ve had a very mild winter this year. It’s only went to 0⁰F twice so far. It’s supposed to get up to 40⁰F on Wednesday. Im not complaining.
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Hi Bill!
The hopper vacuum was only froozen condensation/tar in the tiny hose. The digital temp guages may need new batteries.
We haven’t had thaw in about a month now. Below 0F is forcasted again this week. Hopefully the cool polar hat will tilt your way soon enough 
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Knowing the Mazda pickup is up for inspection made me pretty nervous the last couple days.
I big sigh of relief today - I got a blank sheet and the truck is good to go for another 2 years 
People were probably questioning my big smile lighting up outside the inpection facility in the rain. I hardly noticed the light sprinkle
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That’s great JO, two more years of DOW for your truck. A big SWEM even in the rain.
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More on maintence.
Did my annual pickup hay change today. First river swim of the year - with the filter barrel.
My vacuum guages have been acting sluggish for some time now. The hay wasn’t too clogged and I know I flush the cooler and piping upstream the filter regularly. So, I started to dismantle the tubing downstream the filter, up to the motor. My little finger hardly fit into them 
I may not have flushed them last year 
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Thanks, JO, for your honesty. Not all of us keep up with maintenance as we would like to. Maybe two-plus inch pipe isn’t critical in all applications?
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Hi Kent, with twin pipes I may have been able to procrastinate another year. Also, our European 2" pvc is actually only 1"7/8 - so, maybe 2 more years
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HI jan I had questain about your anual inspection- are they actually checking the emissions while running on wood.!!! THANKS for your replys.
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