Originally Posted by denny71gt
Thank you for your reply. But it appears that the hole will not be covered by the bell-housing because it lines up with the "recess in clutch housing" (Figure 72-73, Flywheel Housing on Cylinder Block, page 72-38 in the 1971 Opel GT Service Manual). The small hole can be seen in Figure 72-119, Exploded View of 1.9 Engine Transmission (page 72-54, same manual) just above the top of the transmission to clutch housing gasket on the drawing. It would appear that the Main Drive Gear to Clutch Seal Ring would prevent any oil from entering the bell-housing and subsequently the clutch surfaces. But what is its purpose and would plugging it cause a problem?
Denny
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That's Figure 72-112 not 119.
The front of the transmission is sealed by the gasket (#2 in the referenced Figure) between the transmission against the bell-housing surface, along with the front seal (I believe it is #14 in the same figure) that sits inside the recess in the bell (aka "Clutch") housing, as referenced by #5 but better by #6 in Figure 72-73. The "hole" you describe lines up to the lower part of the recess, but the seal and gasket prevents oil from escaping the recess (and the entire space between the transmission and the bell housing). You can seal that hole all you want, but without both the seal and gasket intact, the oil will instead leak out the main front bearing. The outside of the seal DOES NOT actually seal against the transmission, but against the INSIDE (the "recess") in the bell-housing. The seal DOES seal (when it is sealing
) against the outer surface of the main shaft (#10 in 72-112).
In short, you can't fill the transmission with oil until it is fitted to the bell-housing, with the gasket and front seal in place and all the bolts fixed and torqued. Oh, and the rear seal (#40) and driveshaft as well, not to mention the cover (#49) and gasket (#50) and side shifter seals (two #'s 57)...
HTH