2eighTZ4me Posted September 27, 2014 Share Posted September 27, 2014 I got a thicker MLS head gasket, as my pistons were bopping the bottom of the head once it got warm. Old (MLS) gasket mic'd out at .64mm (uncrushed - after it had been reused a couple of times). The new gasket I got is 1.25mm crushed. Timing chain was a wee bit tight when I put the chock down in there to pull the head. I played 7 kinds of hell getting the sprocket back up on the cam with this new gasket. The chain is tight - I mean tight....you can barely move it when putting a good deal of pressure on it. I spun the motor over by hand a couple times, and still no slack. Wondering if the tensioner is bottomed out....?? I have a feeling though - once things get up to temp, that the chain will gain a bit more slack. Anyone run into this?? Quote Link to comment Share on other sites More sharing options...
skirkland1980 Posted September 27, 2014 Share Posted September 27, 2014 Well shifting the chain guide over help any? Quote Link to comment Share on other sites More sharing options...
NewZed Posted September 27, 2014 Share Posted September 27, 2014 There's a guy who recently snapped the tensioner head right off of the shaft. It was extended and cocked when he put the chain back. He had the same problem getting the sprocket back on as you. Pretty sure that if you get your eye just right or use a mirror that you can see the tensioner, with the valve cover off. If you see a lot of the shaft you might have a problem. You might try rotating the engine backward, but it could be too late. The half mm extra in HG isn't going to matter. Quote Link to comment Share on other sites More sharing options...
Pac_Man Posted October 28, 2014 Share Posted October 28, 2014 Mine was tighter than a pair of jeans after Thanksgiving dinner. FYIW. All new timing components. Quote Link to comment Share on other sites More sharing options...
TimZ Posted October 28, 2014 Share Posted October 28, 2014 There's a guy who recently snapped the tensioner head right off of the shaft. It was extended and cocked when he put the chain back. He had the same problem getting the sprocket back on as you. Pretty sure that if you get your eye just right or use a mirror that you can see the tensioner, with the valve cover off. If you see a lot of the shaft you might have a problem. You might try rotating the engine backward, but it could be too late. The half mm extra in HG isn't going to matter. Agreed - the description sounds pretty much exactly like what happens when the tensioner comes loose and gets cocked. What did you use for a chock? Quote Link to comment Share on other sites More sharing options...
2eighTZ4me Posted October 28, 2014 Author Share Posted October 28, 2014 Well - it's been running fine now for a month. Even did track day at AMP / Z Nationals. Chain is still a little tight, but all is fine. I did poke a mirror and light down the front and the tensioner appears to be seated properly. I'm just gonna roll with it. Next stop is the dyno.... Quote Link to comment Share on other sites More sharing options...
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