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Registered
Join Date: Jul 2006
Location: S. Florida
Posts: 7,249
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Remove the left side top rocker cover. If the intercooler is in the way remove it first.
When number one piston is at TDC on the compression stroke both valves will be closed and there should be right around .004" rocker arm elephant foot to valve stem clearance so you will be able to wiggle both rocker arms that tiny little bit. You'll feel the .004" clearance and you may hear the faint clicking as you wiggle the rocker arms back and forth. |
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02-13-2018, 08:53 AM
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Brando
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thanks
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Turbo powa! 1977 911s. it's cool |
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02-13-2018, 10:56 AM
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I would rather be driving
Join Date: Apr 2000
Location: Austin, TX
Posts: 9,108
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And to add to what JFairman described... If the #1 piston is at overlap (meaning #4 is at TDC) the rockers will be tight due to spring tension.
Its pretty easy to tell if the rocker is "loose" indicating TDC or "tight" indicating cam overlap. If #1 is tight, rotate crank 360 deg and it should be loose.
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Jamie - I can explain it to you. But I can not understand it for you. 71 911T SWT - Sun and Fun Mobile 72 911T project car. "Minne" - A tangy version of tangerine #projectminne classicautowerks.com - EFI conversion parts and suspension setups. IG Classicautowerks |
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02-13-2018, 12:30 PM
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Registered
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If the rocker on #1 is slack - TDC on firing - as above. When you go another 180 deg you are on the cam timing stroke and the rocker should have depressed about 1-2mm. So, easy to tell if you take the cover off. If side 3-6 is easier to get at - less crap to remove - take that inlet cover off. When crank at TDC mark, if #4I is depressed 1-2mm, then #1 has to be on TDC firing/comp.
Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-) |
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02-13-2018, 05:19 PM
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hoonkraft
