 914 flywheel vs a bus flywheel, any differences? |
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| malcolm2 |
 Apr 26 2020, 07:43 AM
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#1
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Advanced Member  Group: Members Posts: 2,749 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States 
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I sure can’t see any.
Building a 2.0 from a 1.8 from a 914 for my 72 bus that came with a 1.7. Have both flywheels. I did not label either. The 914 was running when removed so it must be the shinier one. The bus sat in a field for 10 years. So much moisture under there that the magnesium bell housing deteriorated. Anyway, both are 210 mm. Some vendors say their 914 FW won’t work on a bus and visa-versa. Anyone have more details?    |
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| GregAmy |
Apr 26 2020, 07:59 AM
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#2
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Advanced Member Group: Members Posts: 2,651 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States
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One thing I see is that the one on the left does not have the step for the pilot bearing "seal" (a round piece of basically felt that you oil.) Do both have the inside groove for the o-ring?
Measure the flange thicknesses and offsets, see if there's a difference. Edit: also, check the offset of the ring gear versus its inner base flange (where it mates to the crankshaft.) I seem to recall a prior discussion that this offset was slightly different due to the difference in transaxles used. If so, the 901 trans starter gear may improperly engage with the flywheel ring gear. |
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| malcolm2 |
Apr 26 2020, 08:03 AM
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#3
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Advanced Member Group: Members Posts: 2,749 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States
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QUOTE(GregAmy @ Apr 26 2020, 08:59 AM)  One thing I see is that the one on the left does not have the step for the pilot bearing "seal" (a round piece of basically flannel.) Do both have the inside groove for the o-ring? Measure the flange thicknesses and offsets, see if there's a difference. doesn't the "step" come from the fact that the pilot bearing is slightly smaller (shorter) than the thickness of the hole? The FW on the right still has the pilot bearing installed. FW on the left has the Pilot bearing removed. And Yes, both have an o-ring groove, even still have the o-rings installed. |
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| GregAmy |
Apr 26 2020, 08:07 AM
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#4
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Advanced Member Group: Members Posts: 2,651 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States
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QUOTE(malcolm2 @ Apr 26 2020, 09:03 AM) doesn't the "step" come from the fact that the pilot bearing is slightly smaller (shorter) than the thickness of the hole? Shouldn't matter; after all, that "step" is covered by the plate that goes under the bolts. As I understand it - and how I did it on my engine last month - that step is to make space for the oiled felt seal. And in case you missed my edit above, measure the offset from the backface to the ring gear. |
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Posts in this topic
malcolm2 914 flywheel vs a bus flywheel Apr 26 2020, 07:43 AM
rgalla9146 In the Porsche parts manual the part number is 02... Apr 26 2020, 08:02 AM
malcolm2
In the Porsche parts manual the part number is 0... Apr 26 2020, 08:13 AM Bleyseng On a bus the pilot shaft bearing is in the cranksh... Apr 26 2020, 08:16 AM malcolm2 OK. That is what I see. With that difference in a... Apr 26 2020, 09:05 AM Krieger My car had a 228mm flywheel when I bought it. Idk ... Apr 26 2020, 09:22 AM Mark Henry Bus came with a 210, 215 and the 228mm.
I know for... Apr 26 2020, 09:42 AM Krieger
Bus came with a 210, 215 and the 228mm.
I know fo... Apr 26 2020, 09:52 AM malcolm2
Bus came with a 210, 215 and the 228mm.
I know fo... Apr 26 2020, 10:57 AM Bleyseng That 2.0l crank is shot but it does show you the 9... Apr 26 2020, 10:27 AM Bleyseng You have to install a 091 bell housing on it. The ... Apr 26 2020, 11:26 AM porschetub They aren't the same,the bus flywheel has a di... Apr 26 2020, 02:07 PM malcolm2 http://www.type2.com/
Flywheel section has some ... Apr 26 2020, 06:17 PM |
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