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Threads and Cranks, Was:Oil Sump Drain Thread

To: "Sally or Dick Taylor" <tr6taylor@webtv.net>
Subject: Threads and Cranks, Was:Oil Sump Drain Thread
From: "John & Allison Cyganowski" <janah@att.net>
Date: Thu, 13 Oct 2005 06:17:52 -0400
Hi Dick,

Thanks for your responses.  I am sure my car has a pipe thread (tapered).  I 
am not sure what thread those magnetic plugs have. Whatever it is, it is not 
the same thread as on my car.  I think the magnetic drain plugs are a good 
idea, but I am not going to force fit the wrong thread.  That is DPO stuff 
and I have enough to mend/repair already. I thought briefly of retapping the 
hole, but I am just going back to the square headed BPT plug. It really 
irritates me that these mag plugs are being sold as solutions when they 
don't fit properly and could cause damage to the threads if forced.

How do you define early cars? ;-)

I think of:

CC="Early"
CF="Late"

But I suspect some folks mean Early =TR250/69-TR6 and everything else is 
"Late"! For what it is worth my Car is CC52927LO and the Engine is 
CC53226HE, The engine is original.

I take the list in digest format, but I had not received any digests in more 
than 3 days, so I think it must be stuck somehow. I may try to unsubscribe 
and resubscribe to see if that helps.  Anyway, I did not see your reply to 
me regarding the pilot bushing until yesterday when I went to the archive 
web page to see if the list was still up.  In the interim, I was looking 
over one of the Williams books and he mentioned that the pilot bushing for 
the "long backed crank" was thicker/wider than the regular pilot bushing. 
Supposedly the long backed cranks were fitted to the "early cars" up to 
CC50000 (sounds like the TR250's and '69 TR6's to me). So I am now wondering 
if I have the wrong bushing or if I have one of those "long backed" cranks? 
Have any advice as to how I can tell if I have a long backed crank?

Thanks,
John Cyg.


From: "Sally or Dick Taylor" <tr6taylor@webtv.net>
To: "John & Allison Cyganowski" <janah@att.net>
Sent: Thursday, October 13, 2005 2:33 AM
Subject: Re: Oil Sump Drain Thread


> John---If the new bolt does not have the tapered pipe thread, then the
> crush washer should do its job as the head of the bolt comes into
> contact with the drain bung. Some early engines used these, and the
> later engines had the tapered thread and pipe thread plugs.
> If in doubt, compare it to a pipe plug of the same diameter.
>
> Dick




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