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THE MOMENT OF TRUE. 6 months 2 weeks ago #31694

  • Kawboy
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Based on your statement that you heard a noise like the pistons hitting valves, I would still do a compression check to ensure that you have not bent valves.
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THE MOMENT OF TRUE. 6 months 2 weeks ago #31695

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Based on your statement that you heard a noise like the pistons hitting valves, I would still do a compression check to ensure that you have not bent valves.
I'll do that.
I'll ask a friend for a compression tester.
What would be the tolerance values ​​for correct operation?
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THE MOMENT OF TRUE. 6 months 2 weeks ago #31696

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From page #182 in the Service Manual. I would be happy if you found 130 PSI  (9.14 Kg/Cm2 )  with no more than 10% between cylinders. 

Be careful with a borrowed compression tester. I found out the hard way that compression testers have a special Schrader valve with a very light spring. Many people have replaced the Schrader Valve with one used for a tire and it will cause a compression tester to read as much as 40-50 psi lower than the correct reading. Schrader Valves for compression testers have a break out pressure of 5-8 psi meaning that it takes 5-8 psi to open the valve. Most tire Schrader valves need 20-30 psi to open the valve.

Compression testers are great for a quick check but if you find a problem, you really need a leak down tester to determine what is the problem. Leak down testers will tell you if you have a bad valve ( and which one) , a bad set of piston rings, or bad head gasket.
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THE MOMENT OF TRUE. 6 months 2 weeks ago #31697

  • biltonjim
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Loosening the mounting screws on the tensioner as you described could have resulted in over tensioning the cam chain when you re-tightened them. 

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THE MOMENT OF TRUE. 6 months 2 weeks ago #31698

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Loosening the mounting screws on the tensioner as you described could have resulted in over tensioning the cam chain when you re-tightened them. 
Assembling the chain tensioner correctly, I realized that it moved back a few millimeters when moving the chain up and down by hand between the two axles, resulting in loss of tension.
The way I did the test, moving the tensioner back a couple of millimeters before tightening the screws, the chain did not come loose or lose tension again.
Anyway, this was as a test to check the correct operation of the motor, making sure that the chain is tensioned without losing its shape when rotating.
As I said in another post, I am waiting for a new tensioner with a different design than the original.
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THE MOMENT OF TRUE. 6 months 2 weeks ago #31699

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So since I have the endoscopic camera I have photographed the piston heads inside the cylinders.

The first photo is cylinder 1 and so on until 6.
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