Engine Seized? - Page 26 - Alfa Romeo Bulletin Board & Forums
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post #376 of 572 (permalink) Old 11-19-2017, 07:56 PM Thread Starter
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You guys are starting to make me paranoid about my oil pump/distributor.

-Kevin
1988 Spider Veloce (with lots of 3D printed parts)
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post #377 of 572 (permalink) Old 11-19-2017, 08:47 PM
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Quote:
Originally Posted by Shakey View Post
You guys are starting to make me paranoid about my oil pump/distributor.
You and me both... I'm doing copy cat of what you're doing...

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post #378 of 572 (permalink) Old 11-19-2017, 09:30 PM
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OK. I get to say it. My old boss at"The Agency" had a sign:

"Just because we're paranoid does not mean they aren't out to get us"



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post #379 of 572 (permalink) Old 11-20-2017, 04:29 AM
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Let's say that the shaft did bind when the cover and pump are on. What would one do then? Personally I've never had that happen on assembly and if it did I don't know what I could do other than try a different combination of components. Every oil pump I've ever put on could not be moved in any direction once it was seated on the cover or if it could it was so small I couldn't feel it. I'm sure I don't even come close to the number of oil pumps I've installed compared others on this forum so maybe I've just been lucky to have everything fit. Me lucky? HA, now that's a good one!

The passenger seat is 15 miles an hour faster than the drivers seat.

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2017 Giulia Q4
74 GTV restored daily driver
71 Berlina in 2L restored driver
the ones that got away:
1959 750 series Giulietta Spider Veloce
1962 Giulietta Spider normale
1965 Giulia Sprint normale
1972 GTV
1974 GTV
1974 GTV
1977 Spider
1974 Spider
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post #380 of 572 (permalink) Old 11-20-2017, 04:42 AM
No need to worry - just note the possibility.

This is what I do: I install the dizzy without the o ring which allows me to find the right position easily. I make note of the rotor position, remove the dizzy, reinstall the o-ring and then install the dizzy in the block. You might have to fiddle a bit with the rotor but at least I know I'm close and it's the right orientation. If I'm on top of it when the motor is in pieces I'll paint the offset side of the oil pump drive cog so that it's easy to spot later ( very rare that I remember that).

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post #381 of 572 (permalink) Old 11-20-2017, 07:23 AM
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Quote:
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No need to worry - just note the possibility.

This is what I do: I install the dizzy without the o ring which allows me to find the right position easily. I make note of the rotor position, remove the dizzy, reinstall the o-ring and then install the dizzy in the block. You might have to fiddle a bit with the rotor but at least I know I'm close and it's the right orientation. If I'm on top of it when the motor is in pieces I'll paint the offset side of the oil pump drive cog so that it's easy to spot later ( very rare that I remember that).
+1
All you are doing is reducing the likelyhood of a potential problem. After that, there is nothing more you can do so no need to worry.

Rich Hanning
'65 Sprint GT, '78 Spider, '88 Quad
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post #382 of 572 (permalink) Old 11-20-2017, 09:50 AM
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its important to get the pump hand tightened down, all the time turning the shaft as you then snug the 3 bolts (but don't go crazy tight)

there was some illustration of binding oil/dizzy shafts in this thread from post #147
http://www.alfabb.com/bb/forums/car-...y-74-a-10.html

50 years ago AR were warning to get this part right
http://www.alfabb.com/bb/forums/383658-post14.html

Dom - Alfa Spider 1990 S4 - formerly: Alfa 101 Sprint, 2600 Sprint, Montreal - family classics: Jensen Interceptor II, '58 Hooper RR Silver Cloud I, Shadow II, '60 Corvette.
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post #383 of 572 (permalink) Old 11-20-2017, 01:50 PM Thread Starter
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Here's a photo of the relevant portion of the engine overhaul manual:



Previous steps had you manually turn the oil pump/distributor assembly after installing them in the front cover. After all is said and done, I'm pretty confident that I've got everything in the correct way.
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-Kevin
1988 Spider Veloce (with lots of 3D printed parts)
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post #384 of 572 (permalink) Old 11-23-2017, 01:30 PM Thread Starter
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Here's a question that's been bugging me for a few days: how does the Alfa engine accomplish the 'vacuum advance' function found in other cars? Obviously it works, I just don't know how.

There's no external mechanical action, so is it all centrifugal inside the distributor? I guess it's possible that the electronic ignition timing could influence the spark to occur at the leading- or trailing-edge of the rotor, but I don't know if that would be enough.

An old air-cooled VW will advance the distributor timing greater than 30 degrees at full-throttle. Both of my VWs have Bosch distributors with a combination of vacuum and centrifugal advance action.

Especially when considering the effect of VVT, I would think there needs to be more agility with the spark timing.

-Kevin
1988 Spider Veloce (with lots of 3D printed parts)
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post #385 of 572 (permalink) Old 11-23-2017, 01:59 PM
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Depends on the year. Your 88 does it via the manifold pressure sensor behind the passenger seat.

Tom

1963 Giulia Spider (1750 engine)
1974 GTV
1991 Spider
Former: 1987 Milano Gold
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post #386 of 572 (permalink) Old 11-23-2017, 06:29 PM
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Vac advance has a minor influence on fuel economy and none on torque and HP. There were years when Alfa entertained it and years when they did not. I have two Bosch distributors from the mid 80's with vacuum capsules and neither of them work. Don't sweat it!

Ed Prytherch
79 Spider
85 GTV6 3L
76 Suzuki GT500
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A little government and a little luck are necessary in life, but only a fool trusts either of them. - P.J. O'Rourke
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post #387 of 572 (permalink) Old 12-04-2017, 04:16 PM
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SOOOOOOO ??????? Do you have a runner???? The suspense is driving me crazy!
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post #388 of 572 (permalink) Old 12-05-2017, 08:16 AM
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Yessir

Quote:
Originally Posted by Beerman73 View Post
SOOOOOOO ??????? Do you have a runner???? The suspense is driving me crazy!
Is your car running yet? We are shaking with anticipation, Shakey...
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post #389 of 572 (permalink) Old 12-05-2017, 10:53 AM Thread Starter
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Sorry for not posting. My military duties have interrupted the engine project, but I should be back home this weekend.

I'm anxious to get the Alfa back on the road. I need to get the oldest daughter driving the the Alfa again, so I can do driving lessons with the youngest in the '72 Super Beetle!

-Kevin
1988 Spider Veloce (with lots of 3D printed parts)
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post #390 of 572 (permalink) Old 12-05-2017, 12:08 PM
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My little Sister was born at Whiteman AFB, not that close to Columbia but what the heck

The passenger seat is 15 miles an hour faster than the drivers seat.

currently
2017 Giulia Q4
74 GTV restored daily driver
71 Berlina in 2L restored driver
the ones that got away:
1959 750 series Giulietta Spider Veloce
1962 Giulietta Spider normale
1965 Giulia Sprint normale
1972 GTV
1974 GTV
1974 GTV
1977 Spider
1974 Spider
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