 TDC actual vs. mark on fan |
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| jmargush |
 Mar 16 2025, 06:20 AM
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#1
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Member  Group: Members Posts: 484 Joined: 8-June 04 From: Goshen, IN Member No.: 2,176  |
Has anyone experienced the mark on the fan being off from where actual TDC is ?
Last time I had the engine out I put a dowel in cylinder #1 and found TDC and the factory mark was approx. 3/8" tot he left of where I feel TDC on #1 was. I am going to recheck it and see if I made an error the last time I did it. |
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| barefoot |
Mar 16 2025, 07:37 AM
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#2
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Senior Member Group: Members Posts: 1,412 Joined: 19-March 13 From: Charleston SC Member No.: 15,673 Region Association: South East States 
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I've seen where the fan is displaced from intended position with partially sheared woodruff key.
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| 930cabman |
Mar 16 2025, 07:39 AM
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#3
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Advanced Member Group: Members Posts: 4,180 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States
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QUOTE(barefoot @ Mar 16 2025, 07:37 AM)  I've seen where the fan is displaced from intended position with partially sheared woodruff key. after 1/2 century of DAPO's, anything goes the dowel method should get you close. are you adjusting valves? |
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| jmargush |
Mar 16 2025, 09:04 AM
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#4
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Member Group: Members Posts: 484 Joined: 8-June 04 From: Goshen, IN Member No.: 2,176 |
QUOTE(930cabman @ Mar 16 2025, 06:39 AM) QUOTE(barefoot @ Mar 16 2025, 07:37 AM) I've seen where the fan is displaced from intended position with partially sheared woodruff key. after 1/2 century of DAPO's, anything goes the dowel method should get you close. are you adjusting valves? Checking timing and this lead to questioning the marks. there seems to be a bit of range around the TDC mark where both valves are still closed So I feel pretty good about the adjustment and leak down numbers have been good with the mark I made using the dowel to find TDC |
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Posts in this topic
jmargush TDC actual vs. mark on fan Mar 16 2025, 06:20 AM
GregAmy
I've seen where the fan is displaced from int... Mar 16 2025, 08:33 AM
mjrrti
Has anyone experienced the mark on the fan being ... Mar 16 2025, 08:20 AM bkrantz
Has anyone experienced the mark on the fan being... Mar 17 2025, 07:07 PM technicalninja Depending on year/application the fans are marked ... Mar 16 2025, 12:11 PM GregAmy See if this helps.
http://www.914world.com/bbs2/i... Mar 16 2025, 12:36 PM 930cabman
See if this helps.
http://www.914world.com/bbs2/... Mar 16 2025, 12:47 PM jmargush I just checked it with a dowel again.
What I th... Mar 16 2025, 01:36 PM GregAmy
I just checked it with a dowel again.
You can... Mar 16 2025, 04:46 PM ClayPerrine Please don't use a chopstick........ :lol4:... Mar 17 2025, 03:32 PM emerygt350 Or just don't be an idiot. You guys all have ... Mar 17 2025, 03:52 PM JamesM
Or just don't be an idiot. You guys all have... Mar 17 2025, 11:54 PM emerygt350 That is a very pretty engine you got there. Mar 18 2025, 05:20 AM |
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