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Tcash
Samba Member
Joined: July 20, 2011
Posts: 12843
Location: San Jose, California, USA
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 Posted: Wed Apr 17, 2013 9:27 pm Post subject: Finding TDC #1/ Installing Drive Gear and Dist. |
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| [url=http://www.thesamba.com/vw/forum/viewtopic.php?p=6617648#6617648]Finding TDC #1/ Installing Drive Gear and Dist.[/url] |
FINDING TDC #1 COMPRESSION STROKE
Finding TDC (top dead center) on cylinder number one (#1) on the compression stroke. There is a couple of ways to do this.
1. Pull the #1 spark plug and plug the spark plug hole with your finger.
Turn the engine over clockwise until you feel pressure underneath your finger. Keep going until you line up the TDC mark with the split in the crankcase.
You are on TDC for #1 compression stroke. Move to Installing Drive Gear.
2. You have a 50/50 change of getting this right the first time.
Rotate the engine to where the TDC mark on the crank pulley lines up with the split in the crankcase.
Is the engine on TDC for #1 or #3?
You want #1.
So slowly turn the pulley just past (180 deg)-(1/2) turn clockwise.
Check and see if the (exhaust valve), is beginning to open on #1 cylinder.
(Yes it is) Your lucky because you got it right the first time.
Now turn the pulley counter clockwise until you line up the TDC mark again.
You are now on TDC #1 compression stroke. Move to Installing Drive Gear.
(No it's not) If the exhaust valve is not open you are on TDC #3.
So turn the pulley another (180 deg)-(1/2) a turn clockwise until you line up the TDC mark again.
You are now on TDC #1 compression stroke. Move to Installing Drive Gear.
OR
Link
Link
INSTALLING DRIVE GEAR
Put some heavy grease on the washer.
This will hold it in place while you install the drive gear.
Install washer on gear.
Install the drive gear as pictured below.
Type 1 upright motor.
Type 4 Flat motor.
INSTALLING DISTRIBUTOR
Line up the rotor tip with the notch in the distributor rim.
Drop the distributor in.
Push down on the rotor and twist, to make sure it is fully engaged.
Tighten up the clamp.
Last edited by Tcash on Sun Aug 06, 2017 9:52 pm; edited 6 times in total |
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fusername
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Joined: March 15, 2006
Posts: 2899
Location: Boston MA
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| Posted: Thu Apr 18, 2013 12:05 am Post subject: |
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those of you doing a T4, the text in the bentley is right, but the angle of the photo is very misleading. looks half a tooth off in the pic, so either my eyes are crazy, or that pic was taken w/ teh engine not perfectly at TDC.
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airschooled
Air-Schooled
Joined: April 04, 2012
Posts: 13628
Location: West Coast, USA
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| Posted: Thu Apr 18, 2013 12:38 am Post subject: |
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Just be careful comparing Ratwell's pictures, some are from different angles and it threw me for a loop thinking too hard about it  Goodnight…
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SGKent 
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Joined: October 30, 2007
Posts: 42955
Location: at the beach in Northern Wokistan
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| Posted: Wed Jul 16, 2014 7:47 am Post subject: |
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| fusername wrote: |
| those of you doing a T4, the text in the bentley is right, but the angle of the photo is very misleading. looks half a tooth off in the pic, so either my eyes are crazy, or that pic was taken w/ teh engine not perfectly at TDC. |
It is the angle of the camera shot. If one puts themselves at the same angle and distance as the camera, the gear matches exactly. I had trouble with that photo too until I looked at it from the same perspective as the camera that took the photo. |
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Tcash
Samba Member
Joined: July 20, 2011
Posts: 12843
Location: San Jose, California, USA
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| Posted: Mon Dec 22, 2014 8:29 am Post subject: Firing order |
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Glenn
Mr. 010
Joined: December 25, 2001
Posts: 80531
Location: Sneaking up behind you
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| Posted: Wed Nov 05, 2025 6:18 am Post subject: Re: Firing order |
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This is not always true, depends if you have a vacuum/mechanical or mechanical only distributor.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
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