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Dipstick hole in 351block |
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jhersey29 
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Joined: February-20-2014 Location: Colorado Status: Offline Points: 272 |
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 Topic: Dipstick hole in 351blockPosted: January-12-2015 at 10:00pm |
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What does pcm use to fill the automotive dipstick hole in the block. It is on the port side rear in a moon shaped cut away.
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jhersey29
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Posted: January-12-2015 at 10:02pm |
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JoeinNY
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Joined: October-19-2005 Location: United States Status: Offline Points: 5693 |
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Posted: January-12-2015 at 10:17pm |
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Mine has had a rubber hardware store plug in it for years - it's possible the industrial blocks didn't have them.
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Posted: January-12-2015 at 10:19pm |
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It looks like the casting is thick enough to tap for a taper pipe plug.
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Gary S
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Posted: January-12-2015 at 10:40pm |
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On some engines I have seen plugs that press in like a block core plug only smaller.
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Waterdog
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Posted: January-13-2015 at 8:35am |
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zacley, Small brass plug. If you want, put a little countersink on top & bottom and JB weld it. |
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8122pbrainard
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Posted: January-13-2015 at 8:53am |
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Welch plugs They do come in many sizes. |
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phatsat67
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Posted: January-13-2015 at 11:23am |
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Exactly what I had in mind Pete. |
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8122pbrainard
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Posted: January-13-2015 at 11:48am |
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I would also suggest using a hex socket head pipe plug. You could tap the proper depth and not end up with a protruding head. |
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phatsat67
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Posted: January-13-2015 at 1:41pm |
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Even better idea.
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Mountain Man
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Posted: January-19-2015 at 2:48pm |
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The Welch Plug if available is certainly the preferred choice. Saw the same question over on a Ford Mustang website / forum. One suggestion was to use a spent brass - 9 mm Cartridge casing. According to the information provided it is easily swaged into place using a hammer and a drift punch.
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Fl Inboards
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Posted: January-20-2015 at 9:26am |
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I went through this yesterday. I tapped it and installed a 1/8" brass pipe plug. no Brainer. Home depot had the plug.
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Hobby Boats can be expensive when the hobbyist is limited on their own skill and expertise.
1993 Shamrock "fat" 20. 2008 Nautique 196 5.0 |
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8122pbrainard
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Posted: January-20-2015 at 9:51pm |
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Jody, I'm glad to hear that someone used a proper method of plugging the hole and didn't pound some old shell casing into it.  I hope the person on that Ford site did mention to use a spent casing rather than a live cartridge! 
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Mountain Man
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Posted: January-21-2015 at 4:12pm |
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The guy on the Ford forum with the spent cartridge casing idea had already buttoned up his oil pan and installed the engine before he found the second dipstick hole in his block and could not tap the hole without getting metal shavings in his new engine. I think he knew it was a hack fix because he joked about having a "bullet" engine rather than a "billet" engine...........
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Fl Inboards
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Posted: January-22-2015 at 6:38pm |
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Never thought about shell casing. I had a bag of spent brass .38cal sitting right on bench.
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Hobby Boats can be expensive when the hobbyist is limited on their own skill and expertise.
1993 Shamrock "fat" 20. 2008 Nautique 196 5.0 |
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Gary S wrote: