DESCRIPTION & OPERATION
Page 47
51
Figure 51 — Crankcase Breather (Current Production)
Centri-Max
®
Oil Filter Breather Vent
The oil filter vent line between the cylinder head
cover and the filter mounting adapter on the E7
engine is not used on the E-Tech™ engine. The
vent line is replaced by a vent-to-atmosphere
fitting on the filter mounting adapter.
Lubrication System
There are several changes to the lubrication
system of the E-Tech™ engine, as compared to
the E7. The major changes are:
r
A second oil gallery along the engine right
side that provides oil to the valve roller
followers and EUPs
r
An oil pump that has a drive gear helix
opposite that of the E7
Since its introduction, the E-Tech™ engine has
evolved with changes to the oil cooler and oil filter
mounting arrangement. These changes are also
described in this section.
MAIN OIL GALLERY
The main oil gallery on the E-Tech™ is the same
as the E7 oil gallery with these exceptions:
On early-production engines, a special cross-
drilled plug was used at the front to facilitate oil
flow to the idler gear bore and No. 1 main bearing
bore. This special plug was factory-installed in
the cylinder blocks and should not be removed.
For current production, the block is machined to
accept a 3/4-inch cup plug in place of the special
cross-drilled plug (Figure 52).
52
Figure 52 — Cross-Drilled Plug
1. Fiberglass-Reinforced Nylon Housing
2. Cover
3. Cover O-Ring
4. Filter Element
5. Assembly Mounting O-Ring/Gasket
1. Main Oil Gallery
2. Cup Plug, 3/4-Inch
5_106_00.bk Page 47 Friday, August 4, 2000 11:17 AM
BDC for engine manuals and specs