Duetto engine removal - Page 6 - Alfa Romeo Bulletin Board & Forums
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post #76 of 197 (permalink) Old 01-22-2019, 03:02 PM Thread Starter
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I'm surprised you haven't been warned yet. Be VERY careful about not moving the crankshaft or any of the pistons. You will break the seal of the incredibly thin but large diameter o-rings at the bottom of the cylinder serves. If you do, you'll have to completely tear down the engine to remove the pistons, pull the liners, an replace these seals. You can save this disaster by putting a large washer over 3 or 4 of the head studs, and slide a section of 1/2" die pipe over that. Then just put the head bolts back on these and you will hold the sleeves in place.

Several of the suppliers make a tool that does this exactly.

Robert
how's this? thanks for the warning by the way Jay and Robert! the crank could have moved when taking the flywheel off.
regards
Mark
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post #77 of 197 (permalink) Old 01-22-2019, 06:49 PM
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how's this? thanks for the warning by the way
Perfect!

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the crank could have moved when taking the flywheel off
Not when you have one of these:



They sell for a big $5 on ebay at: https://www.ebay.com/p/EMPI-5003-VW-...8206040&chn=ps

Between your liner hold-downs and your flywheel lock, you'll have enough Alfa-specific tools to ensure that you do a full rebuild at some point in the future.

Jay Mackro
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'65 Guilia Sprint GT
'67 Duetto
'91 164L

Last edited by Alfajay; 01-22-2019 at 06:53 PM.
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post #78 of 197 (permalink) Old 01-22-2019, 07:55 PM Thread Starter
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Perfect!



Not when you have one of these:



They sell for a big $5 on ebay at: https://www.ebay.com/p/EMPI-5003-VW-...8206040&chn=ps

Between your liner hold-downs and your flywheel lock, you'll have enough Alfa-specific tools to ensure that you do a full rebuild at some point in the future.
ughh! i just want to drive this amazing little car...not rebuild it!
thanks though. i'll probably pick one up.
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post #79 of 197 (permalink) Old 01-22-2019, 10:20 PM
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ughh! i just want to drive this amazing little car...not rebuild it!
Aww, rebuilding it is half the fun!

Jay Mackro
San Juan Capistrano, CA

'65 Guilia Sprint GT
'67 Duetto
'91 164L
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post #80 of 197 (permalink) Old 01-23-2019, 08:48 AM
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....They sell for a big $5 on ebay at: https://www.ebay.com/p/EMPI-5003-VW-...8206040&chn=ps.....
Thanks for the link. I've already ordered one - though I won't need it for several months.

Robert
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post #81 of 197 (permalink) Old 01-23-2019, 09:28 AM
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Note that the bolt + nut that comes with it is too large to go through the hole in the Alfa block. They supply 5/16" or 8mm hardware, and you need more like 1/4" or 6mm dia. So get a long, thin (maybe 3" / 80mm long) bolt, nut, washer when you're ready to lock your flywheel.

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though I won't need it for several months.
For $5, these things are a bargain even if you never use it!

Jay Mackro
San Juan Capistrano, CA

'65 Guilia Sprint GT
'67 Duetto
'91 164L

Last edited by Alfajay; 01-23-2019 at 09:48 AM.
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post #82 of 197 (permalink) Old 01-23-2019, 05:52 PM Thread Starter
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I got this off E Bay also. Itís just a piece of a ring gear welded to a steel spacer. I bought it for a BMC A series engine but just found out it works great on the Alfa too 😊
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post #83 of 197 (permalink) Old 01-30-2019, 08:19 PM Thread Starter
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Hi All,
Next question . Any advice out there on how to get these cigarette seals out? I havenít tried yet, but I thought iíd Ask first in case thereís some rookie move iíd Manage to make that would turn this into a debacle.
Thanks!
Mark
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post #84 of 197 (permalink) Old 01-30-2019, 08:23 PM
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Take the bearing cap off , or , use a sheet metal screw into the hole in the cig seal and pull it up— Use a claw hammer to pull it out like a nail

74 GTV with 10548's and Ingram pump
71 Spider 1750 BOMBER ; 1995 LS 78K tight fast car
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post #85 of 197 (permalink) Old 01-30-2019, 08:27 PM
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Ps don’t use those orange seals — use brown corteco seals has been bb consensus.

74 GTV with 10548's and Ingram pump
71 Spider 1750 BOMBER ; 1995 LS 78K tight fast car
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post #86 of 197 (permalink) Old 01-30-2019, 10:26 PM
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I'd go with @goats' first suggestion, and pull the bearing cap. You're going to want to look down in those channels anyway to make sure they're clean, etc.

The replacement cigarette seals that came with my gasket set were too short. I followed the suggestion on another thread here, and used Ultra Copper sealant; it's been holding up great. There's more than one successful way to deal with that cigarette seal area.

-Kevin
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post #87 of 197 (permalink) Old 01-31-2019, 07:25 PM Thread Starter
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Thanks Goats and Kevin,
I probably should just pull the bearing cap huh? I ordered some upgrade cigarette seals from Paul Spruell that Jim G had suggested. I did read an older post the other day showing the ultra copper sealant being used in place of the cigarette seals. It looked intriguing.
Back to pulling the cap: should I just re-torque to the specs in the manual, or is there a plastigauge reference I should check with first before proceeding with the final torquing?
Thanks again for the replies!
Mark
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post #88 of 197 (permalink) Old 02-06-2019, 01:14 PM Thread Starter
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The carbs came back from Top End Performance today. Can't wait to mount them on the new solid spacers I bought from Spruell! On a down note, the machine shop called and said the head needs EVERYTHING! Valves, guides, springs, collets, seals (naturally). Has anyone heard of collets being "mushroomed"? The machinist said it was a first for him also? Anyway, should I just purchase all of this from classic Alfa or does anyone out there have a reason I should buy from another source?
Regards
Mark
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post #89 of 197 (permalink) Old 02-06-2019, 01:30 PM
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Collets get mushroomed by the valve shims. This happens when a machine shop surfaces the tops of the valve stem. Which is a common practice on most other engines because the top of the stem gets worn from the rocker pushing on it.

Alfa valve stems do not need to be surfaced. Doing so will put the skirt of the valve shim against the collets.

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I just got 2 more. Now I have a Matta. I must be crazy.
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post #90 of 197 (permalink) Old 02-06-2019, 03:34 PM Thread Starter
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Collets get mushroomed by the valve shims. This happens when a machine shop surfaces the tops of the valve stem. Which is a common practice on most other engines because the top of the stem gets worn from the rocker pushing on it.

Alfa valve stems do not need to be surfaced. Doing so will put the skirt of the valve shim against the collets.
Ahhhh. I'll pass that on to the machinist
Thanks!
Mark
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