Author Topic: Timing chain question ???  (Read 107 times)

Offline JAG56Cad

Timing chain question ???
« on: August 10, 2019, 10:58:08 AM »
So I had to replace my timing chain it was a bit stretched, hand cranking the engine the distributor did not moved until I rotated the crank about .    :(

Left the engine at #1 TDC and timing mark at the harmonic balance at A. Got a new chain and a spare crank and cam sprockets.
Aligned the crank sprocket per the manual with the woodruff key as shown, timing mark pointing up.
Aligned the cam sprocket with the guide pin toward the left (same as show on the Service Manual) and timing mark aligned with the crank.
Timing for #1 remained at TDC and mark with A, #1 valves were closed (as far as Im able to see with the inspection camera).

Question is;

The manual is not detailed if the #1 would need to be at TDC with the mark at A it just indicates to align both cam and crank marks.   ::)
Only reference I was able to get was from the 1956 National Service Data which shows setting the engine to firing position on #6.
Well I did check # 6 and it also shows to be at TDC which both valves closed.  ???

Before I bottom up the cover and everything else just want to validate with other folks if the way I place my timing chain is correct. Hate to take it all apart to make correction.  :P
Jose Gomez
CLC Member #23082

Offline Lexi

Re: Timing chain question ???
« Reply #1 on: August 10, 2019, 03:59:20 PM »
Jose I have both the Chilton as well as the Motors manuals for 1956 and can dig them out and look in there for you, (unless you checked those as well). I will have a look for these for you. Clay/Lexi

Offline Lexi

Re: Timing chain question ???
« Reply #2 on: August 10, 2019, 04:18:39 PM »
Jose I dug those period manuals out and scanned the pages for you. The Chiltons has more info and is spread over 2 pages, (see 2 scans). Motors manual scan fit on one page, (see scan). Tough size of book to scan on my equipment, (one image a little cut off at right margin), can take a photo if you prefer. Hope there is something here that clarifies matters for you. Clay
« Last Edit: August 10, 2019, 04:23:46 PM by Lexi »

Offline JAG56Cad

Re: Timing chain question ???
« Reply #3 on: August 12, 2019, 08:20:34 AM »

Thanks for the info, I had no time yesterday to re-check since I got held up working on my daughters Nissan A/C clutch replacement.   >:(

The strange thing is setting both cam and crank sprockets to the same position as shown on the manual both #1 and #6 pistons are at the top with the timing mark at A.   ???

I need to re-check my settings again not sure if Im set correctly now or not. When I removed the old timing chain/sprockets I had the timing set to #1 TDC and mark at A and distributor at #1.

So now Im a bit confuse if the picture on the manual is just for illustration or if it is the actual setting with #6 at top and distributor pointing at #6.   :o

Jose Gomez
CLC Member #23082

Offline South_paw

Re: Timing chain question ???
« Reply #4 on: August 12, 2019, 08:04:18 PM »

Take the driver side valve cover off and watch the movement of the valves on #1 as you spin the crank by hand. You'll know when the compression stroke is reaching TDC because it will be right after the intake valve closes.

1956 Eldorado Biarritz
CLC Member since 2001 (Unlisted in Directory)

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Offline PHIL WHYTE CLC 14192

Re: Timing chain question ???
« Reply #5 on: August 13, 2019, 01:31:40 AM »
All I know Jose is when I put the distributor in my newly rebuilt engine I managed to put it in 180 degrees out. Believe it or not it ran! As for the timing chain I just lined up the Mark's on the sprockets as shown in the manual. However look at the problems Lou had with the new camshaft on his car, you're right to double check it all.