oil sump drain plug - Alfa Romeo Bulletin Board & Forums

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post #1 of 29 (permalink) Old 03-13-2017, 03:46 PM Thread Starter
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oil sump drain plug

Anyone know of a source for a replacement drain plug? If not, anyone know size and pitch?

Thank

Tom
68 Giulia GT Jr , 71 Montreal, 74 Spider, 74 Lotus Europa TC
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post #2 of 29 (permalink) Old 03-13-2017, 07:38 PM
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Tom, according to Bruce Taylor, the Montreal sump plug takes a 19 mm socket wrench. Unfortunately I could not find the pitch or diameter of the threads. The sump also takes a 14 x 20 mm copper sealing washer.

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post #3 of 29 (permalink) Old 03-20-2017, 08:07 AM
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I hoped someone would come to your rescue with the actual plug dimensions...

From memory, this drain plug looks 'just like' I remember removing from the Montreal's 'dry sump' last year...if I am wrong you are only out $8.

BMW Engine Oil Drain Plug (12 X 1.5 mm) E12 E23 E24 E28 E30 E31 E32 E34 E36 E39 | eBay

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post #4 of 29 (permalink) Old 03-20-2017, 12:41 PM Thread Starter
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Mark, I've tried a few different size plugs that I have and think it needs a M16 x 1.25. It's an odd size which doesn't surprise me. I found a cheap China made Ebay plug which I have ordered in the hope it will confirm the fitment. If it fits, I will use it as a temporary solution until I find a better made one. It's being rowed over on a boat so it will be awhile before I see it. I will let you know if it fits or not.

Tom

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68 Giulia GT Jr , 71 Montreal, 74 Spider, 74 Lotus Europa TC
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post #5 of 29 (permalink) Old 03-20-2017, 07:12 PM
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You might contact Larry at Alfa Parts Exchange. I remember him saying that when he rebuilt my engine he changed the drain plug to a correct one.

Is this the one you saw on eBay?

Alfa Romeo Giulia Bertone Spider 105 115 OIL DRAIN PLUG MAGNETIC - NEW | eBay

I hope you find the right one. Have you removed your old drain plug and measured it?

Mark
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post #6 of 29 (permalink) Old 03-21-2017, 02:50 AM
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OKP list them (small and larger one with gauze filter)
OKP Parts and Engineering GmbH

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 #7 of 29 (permalink) Old 03-21-2017, 05:02 AM Thread Starter
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I'm a bit suspicious as they list it as 105/115/Montreal. The Montreal sump plug is definitely not the same as a 105.

Tom
68 Giulia GT Jr , 71 Montreal, 74 Spider, 74 Lotus Europa TC
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post #8 of 29 (permalink) Old 03-21-2017, 05:08 AM
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send them an email and ask (email is on their 'impressum' page)

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 #9 of 29 (permalink) Old 03-21-2017, 05:13 AM Thread Starter
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Yes I plan too.

Tom
68 Giulia GT Jr , 71 Montreal, 74 Spider, 74 Lotus Europa TC
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post #10 of 29 (permalink) Old 03-21-2017, 08:31 AM
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I have bought way too many things that "fit all 105" Alfa Romeo that do not fit the Montreal (105.64).

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post #11 of 29 (permalink) Old 03-21-2017, 10:02 AM Thread Starter
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Yes, I've run into that as well. I never trust catalogs without calling or writing first to verify. OKP got back to me, but didn't answer my question about fitment. I sent them another inquiry, but I am doubtful that the plug they list is correct. The price we pay for owning such a unique car.

Tom
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post #12 of 29 (permalink) Old 03-21-2017, 02:18 PM
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Hi Tom, get me the dimensions and I'll make one for you in brass, without the magnet though. My spare sump has its threads stripped and I am not sure of the correct size. Let me know what size hex size too. N/C for my Monty friend. Peter.

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post #13 of 29 (permalink) Old 03-21-2017, 02:47 PM Thread Starter
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Thanks Peter, as soon as I get it resolved and know the correct info I will be in touch with you.

Tom
68 Giulia GT Jr , 71 Montreal, 74 Spider, 74 Lotus Europa TC
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post #14 of 29 (permalink) Old 03-22-2017, 01:26 AM
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could it be that the drain plug listed by suppliers as '105/115/116/monty' etc is for the oil tank, and not the sump (oil pan)?

I like this simple diagram....shows how neat the oil flows from the oil tank out through the inspection hole....yeah right...first time I did that it made a right old danged mess on the ground (and the body)
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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 #15 of 29 (permalink) Old 03-22-2017, 08:06 AM
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So far I've changed the oil in the Montreal twice and both times managed to have a 'Valdez' type oil spill in the garage. The second time I got covered with hot oil! I think that I'll either take it to the Express Oil Change near me and let them change the oil for $30 +oil & filter that I will supply or I'll use a 5 gallon bucket!

The link that Spiderseri4 posted to OKP shows two different drain plugs one with a circular magnet and one with two parallel magnets:

OKP Parts and Engineering GmbH

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