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#1
09-12-2006, 11:01 PM
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Timing chain stretch 300tdt
I adjusted the valve lash this afternoon on my '85 300tdt and it was not off by much. There were 2 intake valves that were out by .001in. The #5 exaust was the worst at .008in where the book says it should be .014in. The job realy was not all that difficult with a short 14mm wrench that came stock with Toyota FJ40s in 1974. (another story all together)...
I read about checking timing chain stretch in this forum. Apparently it is possible to estimate how worn the chain is by lining up the mark on the front of the cam and seeing how far off TDC the crank is. My problem is that the only mark I can find on the cam that looks right puts the crank nowhere near TDC. I turned the crank a dozen times looking to make the crank come near TDC when the cam mark was lined up. Perhaps I have the wrong cam mark? Could someone describe it, or even better direct me to a pic. I can't imagine thet the chain is so streched that it would not even come close to TDC. What am I doing wrong? Thanks in advance. 
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#2
09-13-2006, 01:55 AM
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take a look at this
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#3
09-13-2006, 11:21 AM
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That's a great tutorial in that link.
 You answer is in step #2. If you align the marks and don't see the numbers on the ballancer spin the cam around again and they should be there. Danny
__________________
1984 300SD Turbo Diesel 150,000 miles OBK member #23 (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination
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#4
09-13-2006, 11:09 PM
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Thanks Tomnik that is a realy helpfull tutorial. Unfortunatly I was looking at the right mark on the cam. I turned the motor several times but the cam still will not put the crank anywhere near TDC. I wonder if the person who had this motor before me took the harmonic balancer off and put it on wrong???
 I found that the bolts where loose and the sound gave me an awful fright. Although the motor does not shake or vibrate. I retightened/replaced them but the pully still seems to wobble just a bit. If I am not mistaken there is a keyway in the crank so it can only go on one way. (if it is anything like other cars I have worked on) I gess I will have to look in to it. Unless anyone has a better idea.
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