Engine Seized? - Page 20 - Alfa Romeo Bulletin Board & Forums
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post #286 of 572 (permalink) Old 11-04-2017, 11:58 AM
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I apologize if this is getting off thread but it is an interesting story. I visited Lane Phillips yesterday. He is 75, an ace bike mechanic and a former member of the ABB. He said that on bicycles the closed end of the clip should point forward and that he has known chains come apart when the clip was installed backwards. The failure occurs when the rider is shifting gears. The open end of the clip contacts a tooth of the the cog that it is switching to and the clip pops off. This probably explains the generally accepted practice of putting the clip on in the forward direction. Putting one on backwards could also cause a motorcycle chain to fail if the edge of the chain contacts or rubs against something.

Ed Prytherch
79 Spider
85 GTV6 3L
76 Suzuki GT500
2011 Jaguar XKR

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 #287 of 572 (permalink) Old 11-04-2017, 12:09 PM
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I would always put a motorcycle drive chain on with the open end in front. Especially when one has a English bike that is one up and three down on the right and a rice burner that is one down and four up on the left and definitely in a drag race when an up shift at speed and r's is inadvertently a down shift.

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

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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
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1974 GTV
1977 Spider
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post #288 of 572 (permalink) Old 11-04-2017, 02:35 PM
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Maybe someone used your method on Agostini's chain in the 1967 IOM TT. I was watching at Hilberry as he coasted through on the last lap.

Ed Prytherch
79 Spider
85 GTV6 3L
76 Suzuki GT500
2011 Jaguar XKR

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 #289 of 572 (permalink) Old 11-04-2017, 09:40 PM
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Actually I was trying to agree with you, I first wrote closed end in front. for some reason I thought I had it backwards and changed it. Early onset is all I can think of. I do know for sure I put the closed end in front on my drive chains, I just checked.

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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post #290 of 572 (permalink) Old 11-05-2017, 01:11 AM
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Quote:
Originally Posted by 101/105guy View Post
"Or as they told us in Alfa training class. The fish swims upstream."

Must have been in my class !
You have Alfa factory training?

1969 1750 Spider Veloce w/dual webers, 1969 1750 Berlina, 1971 1750 Spider Veloce w/ dual webers, 1985 Spider Veloce 23,000 orig. miles, {Two} 1986 Spider Veloces, 1987 Spider Veloce bought new, 1988 Quadrifoglio, 1991 164S, Plus several more. I think they are breeding.
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I just got 2 more. Now I have a Matta. I must be crazy.
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post #291 of 572 (permalink) Old 11-06-2017, 03:49 PM Thread Starter
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The radiator is back from the shop.

I have boxes of parts from Classic Alfa and Centerline.

I believe I'm at rock bottom of this project, and ready to start re-assembling everything. I really can't complain too much about how things have gone. The only real stumbling block was getting the crank pulley nut loose. The most laborious part of the project has been removing the old gaskets and adhesive. Having an aluminum block and head certainly complicates gasket removal.

I'm still working on getting the gasket remnants off the head, so I haven't done any of the valve work yet. I'm mostly interested in getting the crankshaft reinstalled, and ensuring things will rotate smoothly. I'll have that nagging doubt until then.

Which leads me to the question of the day: the caps for the main bearings have their number stamped in them (e.g. 1, 2, 3, 4). In none of my photos or notes did I capture which way the caps were orientated. Are the numbers upright when read from the exhaust side, or intake side? I'm not even sure if it matters, but I want to be correct.

-Kevin
1988 Spider Veloce (with lots of 3D printed parts)
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post #292 of 572 (permalink) Old 11-06-2017, 04:06 PM
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Stop by your local auto shop and get some "Plasti-Gauge". It's strips of precision plastic line - like heavy fishing line - with a paper gauge. You put it on the top of the bearing and tighten the cap. Then take off the cap - the plastic will be smashed wide. The paper gauge then measures the clearance your have! Its a bit tedious - remember to lightly oil the bearings and inserts, and torque the caps accurately. But it'll give you great confidence that your clearances are good!

Also get a tube or so of assembly lube. Use on all moving surfaces. It's thicker than engine oil so it stays while you finish assembly, and provides good lubrication on initial start.

For head and valve assembly, get a small can of "Prussian Blue". This is a blue lacquer used by all machinists for precision assembly. Paint the valve seats when you think you're done lapping. Do a few more twists to see if all the blue is taken off the seats.

Robert

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post #293 of 572 (permalink) Old 11-06-2017, 04:18 PM
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I second the plastiguage , easy to use.
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post #294 of 572 (permalink) Old 11-06-2017, 05:27 PM
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You want the green plastigauge.

1969 1750 Spider Veloce w/dual webers, 1969 1750 Berlina, 1971 1750 Spider Veloce w/ dual webers, 1985 Spider Veloce 23,000 orig. miles, {Two} 1986 Spider Veloces, 1987 Spider Veloce bought new, 1988 Quadrifoglio, 1991 164S, Plus several more. I think they are breeding.
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I just got 2 more. Now I have a Matta. I must be crazy.
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post #295 of 572 (permalink) Old 11-06-2017, 05:40 PM
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I used the Green Plastigauge on my 2L. But it's so cheap I also bought the Red type too. Different clearance ranges for each one.

Robert
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post #296 of 572 (permalink) Old 11-06-2017, 05:43 PM Thread Starter
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Already with you on the plastigauge and assembly lube. I hadn't heard of Prussian Blue before, but picked up some tonight. I had to ask for it at the auto parts store...they keep it in the back.

-Kevin
1988 Spider Veloce (with lots of 3D printed parts)
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post #297 of 572 (permalink) Old 11-06-2017, 05:44 PM Thread Starter
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Before I get to messing with the plastigauge, anyone have any wisdom on the orientation of the bearing caps?

-Kevin
1988 Spider Veloce (with lots of 3D printed parts)
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post #298 of 572 (permalink) Old 11-06-2017, 05:53 PM
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The relief for the bearing tang goes to the same side as the one in the block. Man, you got to pay attention when you take stuff apart.

Last edited by Chas H; 11-06-2017 at 05:56 PM.
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post #299 of 572 (permalink) Old 11-06-2017, 06:00 PM
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That's what camera phones are for isn't it? And thousands of plastic freezer bags (strongest) and permanent markers...

All these little details on how to actually do all this that never show up in the manuals. I learned most of it by watching (and pestering) better experts when I was very young.

And I also followed Rule #1: Make all possible mistakes until the only thing left is to do it right.

Robert
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post #300 of 572 (permalink) Old 11-06-2017, 06:06 PM Thread Starter
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Quote:
Originally Posted by Chas H View Post
The relief for the bearing tang goes to the same side as the one in the block. Man, you got to pay attention when you take stuff apart.
As I mentioned, I've been taking copious photos and notes during this project. It just so happens that this detail is something that did not get captured. This Alfa engine isn't at all like the turbine engines I deal with at work. The engine overhaul manual does not even specify, so I think it's a legitimate question.

I'll figure out what "relief for bearing tang" means.

Thanks.

-Kevin
1988 Spider Veloce (with lots of 3D printed parts)
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