M20 tappets
Moderator: martauto
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fastandloud
- E30 Zone Newbie
- Posts: 11
- Joined: Mon Dec 09, 2013 11:00 pm
Changed the distributor cap and rotor arm today on m20 320 ran quite for a few minutes then the tappets started to make noise any ideas why this would happen
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Brianmoooore
- E30 Zone Team Member
- Posts: 49360
- Joined: Mon Jan 10, 2005 11:00 pm
There's absolutely no reason why you should, to change the distributor cap, but confirm that you didn't remove the rocker cover.
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fastandloud
- E30 Zone Newbie
- Posts: 11
- Joined: Mon Dec 09, 2013 11:00 pm
Didn't remove rocker cover just changed cap and rotor arm because they were bad
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Brianmoooore
- E30 Zone Team Member
- Posts: 49360
- Joined: Mon Jan 10, 2005 11:00 pm
If that's all you did, then there's absolutely no connection with noisy tappets.
The reason I asked about the rocker cover is that it holds a little rocker shaft retaining plate in place at the front of the head, which could conceivably be pulled off with the cover, especially if someone's been over generous with sealant in the past.
The oil feed to the whole top end of the engine is via the space surrounding one particular head bolt, and then into the exhaust rocker shaft through a drilling in the head, and if this retaining plate is missing, the rocker shaft is free to rotate, blocking the path between the drilling and the shaft, and cutting off oil to all the rockers and spray bar.
The reason I asked about the rocker cover is that it holds a little rocker shaft retaining plate in place at the front of the head, which could conceivably be pulled off with the cover, especially if someone's been over generous with sealant in the past.
The oil feed to the whole top end of the engine is via the space surrounding one particular head bolt, and then into the exhaust rocker shaft through a drilling in the head, and if this retaining plate is missing, the rocker shaft is free to rotate, blocking the path between the drilling and the shaft, and cutting off oil to all the rockers and spray bar.