Any ideas what this number means? - Alfa Romeo Bulletin Board & Forums
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post #1 of 8 (permalink) Old 05-19-2018, 06:23 PM Thread Starter
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Any ideas what this number means?

Adjusted valves today for the first time on my 1976 Alfetta GT. Saw this number stamped by the camshaft alignment marks. Can anyone shed some light on this?
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post #2 of 8 (permalink) Old 05-19-2018, 07:25 PM
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Someone scribed a new line and stamped 104 for 104 degree lobe centers.


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post #3 of 8 (permalink) Old 05-20-2018, 08:21 AM
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Mark!

Regardless of the stamping that mark likely isn`t in the correct position for 104 LC on the intake cap.

Of course I`m basing it on the Factory mark being 102.

If this head/cam cap came from a European 1750 or 2 liter with LC marks at 99.5 when fitted by the factory with 10548-01 cams then it might be correct, And with the 10548-01 cams, drivability / torque is enhanced by using 104/104 lobe centers.

Best to get (download from Centerlinealfa.com) a template and verify the markings.

FYI a 104 LC is just to the side of the 102 marks. Remember LCs are crank degrees so 2 degrees is 1 degree at the cam
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post #4 of 8 (permalink) Old 05-20-2018, 08:41 AM
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On a 1976 US spec 2000 the factory setting was 114-114. See this http://www.alfabb.com/bb/forums/engi...ing-marks.html

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1974 2000GTV
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post #5 of 8 (permalink) Old 05-20-2018, 09:35 AM
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Quote:
Originally Posted by yvesmontreal View Post
On a 1976 US spec 2000 the factory setting was 114-114. See this http://www.alfabb.com/bb/forums/engi...ing-marks.html
.... only when using VVT !

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post #6 of 8 (permalink) Old 05-20-2018, 10:37 AM
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.... only when using VVT !
Nah... US 2000s were set at 114-102, then 114-114 up until 1977, when they invested in a better catalyst and returned to 102-102.

Setting these engines to 102-102 does wake them up.

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post #7 of 8 (permalink) Old 05-20-2018, 10:53 AM
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Quote:
Originally Posted by Gordon Raymond View Post
Someone scribed a new line and stamped 104 for 104 degree lobe centers.
Yep.
As Gordon said, someone scribed a 104 mark on the exhaust cam cap. Factory stock for 1976 was 114/114 (114/102 for California Alfettas (source - 1976 Engine Management manual)). Can you post a picture of the intake cap?

Jim

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post #8 of 8 (permalink) Old 05-20-2018, 07:55 PM Thread Starter
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Originally Posted by papajam View Post
Yep.
As Gordon said, someone scribed a 104 mark on the exhaust cam cap. Factory stock for 1976 was 114/114 (114/102 for California Alfettas (source - 1976 Engine Management manual)). Can you post a picture of the intake cap?
Both the exhaust and the intake cam caps have the 104 marks on them. When I set the motor to TDC, the intake side lined up with the 104, and the exhaust side lined up with the regular marks (both caps have the marks). The cams are different too. the intake cam is a 10548032051 and the exhaust cam is, the first couple numbers are mushed, but it goes 200320000. Motor is in good shape, has Webers on it, is a bit lackadaisical below 2500 rpm, but then really gets going. The previous owner said motor had some modifications to it. It came with a Spica, so the Webers are a mod, it has after market headers on it as well, not sure what else he did.
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