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#1
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603 eng timing
I put this project on the back burner for awhile, now its back on the front burner. To make a long story short; I bought the car with the head removed. Purchased a replacement head, had it worked and installed head.
Now is the stumper; I used the dial indicator method to find #1 cylinder, intake valve 2 degrees lift; my crank wasn't in position. Removed cam, rotated eng to TDC, installed cam carefully to position where I had my 2 degrees lift on #1 cyl. intake valve, and the factory scribe mark on cam is nowhere near the forge line on #1 cam bearing cap. I've got a ? for someone that has an 603 engine with the valve cover off. Align the timing marks; crank TDC and cam timing marks and tell me which valves are actually open. When I did this my #4 intake and #5 exhaust were the only valves open. I check this thread through the day today. |
#2
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You rotate engine to TDC (indicator on harmonic balancer at 0 deg and #1 cam lobes up)
Wait, how can you tell if it's compression or exhaust if the cam is not installed? The FSM shows using a dial indicator on the piston top by way of removing the prechamber. I think this is your best method now.
__________________
Michael LaFleur '05 E320 CDI - 86,000 miles '86 300SDL - 360,000 miles '85 300SD - 150,000 miles (sold) '89 190D - 120,000 miles (sold) '85 300SD - 317,000 miles (sold) '98 ML320 - 270,000 miles (sold) '75 300D - 170,000 miles (sold) '83 Harley Davidson FLTC (Broken again) :-( '61 Plymouth Valiant - 60k mikes 2004 Papillon (Oliver) 2005 Tzitzu (Griffon) 2009 Welsh Corgi (Buba) |
#3
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When I had the cam installed, originally, with the crank on TDC and mark on cam aligned with mark on #1 cam bearing cap, rotated eng, nothing made contact. If I was 180 degrees out wouldn't I have a valve to piston interference?
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#4
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180° out of phase on the camshaft is of no consequence to a four stroke engine. Imagine the crankshaft rotated by 360 degrees...........there's your new cam position. Relationship to the IP..........however..........will be the problem.
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#5
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Ok, thanks; can anyone tell me in relation to the crank, cam, IP; what's the ratio? When the crank makes one revolution how many times does the IP rotate 360 degrees?
Thanks. |
#6
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Quote:
The crank rotates twice for every one revolution of the cam and the IP. |
#7
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Ok, thanks Brian. When I did a manual rotation when my IP mark in the window (bright light and mirror method) I was about 17 degrees. I believe I'm looking for 15 +/- 1 degree. Do you think 1 degree is something to be concerned obout or could that just be chain stretchage??
Thanks for the input. |
#8
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Quote:
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#9
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Ok thanks Brian. I finally got it. I reread an old thread and with the input I got on this forum it finally clicked.
Thanks again. |
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