B20b
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1970145swagon
- Posts: 6
- Joined: 9 March 2019
- Year and Model: 1970 145s
- Location: VA
B20b
Hi me and a friend of mine have a 145s with a b20b in it. It has been sitting for 20 years. The motor was rebuilt then it sat. We cranked it over and it dumped oil at the back of the engine. We thought it was a rear main seal but when we pull the flywheel off. There's a little hole in the back of the block of the engine. it's above the crank and to the right of it. that leaks all the way down the back of the engine. Does anyone know what that is and what I'm supposed to put in there to prevent it from leaking? Any help would be be appreciated.
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RickHaleParker
- Posts: 7129
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- Year and Model: See Signature below.
- Location: Kansas
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1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
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1970145swagon
- Posts: 6
- Joined: 9 March 2019
- Year and Model: 1970 145s
- Location: VA
so i can you put in any pug as long as it fits? any way thanks for answering.RickHaleParker wrote: ↑09 Mar 2019, 17:25 It just missing a plug. You can download the Service Manual for the B20B here.
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RickHaleParker
- Posts: 7129
- Joined: 25 May 2015
- Year and Model: See Signature below.
- Location: Kansas
- Has thanked: 8 times
- Been thanked: 958 times
As long as it fits and clears the flywheel. Go for a length that does not extend above the top of the hole. You might want to match the material so that you don't get Galvanic corrosion between the plug and the block.
Does this look like the correct plug? Aftermarket - Oil Galley Plug - B18 B20
Does this look like the correct plug? Aftermarket - Oil Galley Plug - B18 B20
⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
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1970145swagon
- Posts: 6
- Joined: 9 March 2019
- Year and Model: 1970 145s
- Location: VA
looks good to me. thanks for all you help!RickHaleParker wrote: ↑10 Mar 2019, 09:03 As long as it fits and clears the flywheel. Go for a length that does not extend above the top of the hole. You might want to match the material so that you don't get Galvanic corrosion between the plug and the block.
Does this look like the correct plug? Aftermarket - Oil Galley Plug - B18 B20
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jimmy57
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It has been a long time but I think that is a 1/4 NPT plug (tapered threads called National Pipe Thread). The thread diameter is way larger than the dimension in the thread name. The size is for ID of iron pipe so the 1/8NPT is about 7/16 inch, 1/4NPT is between 9/16 and 5/8 inch, 3/8 NPT is about 11/16 inch hole.
