|10-18-2011, 03:57 PM||#1|
Join Date: May 2004
Location: Long Island, NY
note on Camcover , Oil Fill ...
Someone recently observed that the oil fill aperture in the camcover can 'backup' and overflow ... the fill process needs be gradual.
I have now cleaned up three camcovers (all composite DOHC) , one each 1996 , 1997 , 2000.
>>>from that vast experience follows two observations:
-- Slow oil filling is the 'nature of the beast' on these rigs , since there are two inclined ramps/baffles in the camcover , which appear designed to direct oil-mist in the valve-cover 'chamber' into a (pair of) streams , which drain between the camshafts , to a point toward the TimingCover end. One of these baffling ramps is immediately below the oil fill.
-1- Sometimes an old camcover ('96) will have been run hot enough that the oil (such as it is/was) will create a sludge , largely filling the space between the underside of the camcover , and the ramps ... thus impeding any further flow.
-2- Sometimes (2000) , after the (DOHC-only relevant) camshafts have been removed (as at an auto-wrecking yard) , the camshafts are returned to their
journals , the bearing-caps are re-installed , but the screws fastening the bearing caps are left loose (saves Time!) , and the camcover is re-installed to protect the head during storage . In this process , the ramps/baffles in the cover can contact the (loose) camshaft-bearing-cap screws . This can dent/distort the ramps , so that a section of the ramp is horizontal , trending to make the oil 'pool' rather than 'flow'.
-- It is not a bad idea to remove the baffles when cleaning an old camcover , but it might be better to just have the entire thing 'dipped' into a vat of cleaning solution by a machine shop (or at home). The baffles are mostly just one ribbon of copper alloy , so a solution will do the job adequately.
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|10-18-2011, 04:18 PM||#2|
Join Date: Apr 2008
Location: Far Southwestern Iowa
Re: note on Camcover , Oil Fill ...
I think the baffle plates are steel and the duct is thin plastic. The assembly in aluminum covers is held in place with drive screws and removal is possible but replacement will require re-engineering. Just buy some rubber stoppers and fill the inverted cover with purple power and let it soak.
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