I'm attempting to fix some oil leaks by replacing the rear main seal and oil pan gasket on my DZ302 engine.
I was able to remove the oil pan by supporting the rear of the engine and jacking the front of the engine up as
outlined in the chassis service manual. I only had to lift the engine about 1" to gain clearance for the pan.
At first I thought I had to rotate the crank to gain clearance but quickly found the crank position does not
matter in the DZ302 due to the oil baffle hanging from the block cap journals.
I've got the pan cleaned up and painted and I think I have all of the parts. I've been doing some research
on camaros.net and in person and have found there are a variety of methods used for installing the seal and oil
pan gasket. It takes some work to get the pan off and I want to ensure I get things back together correctly. I
am also putting in a new clutch - a Centerforce II. I'm outlining my process for installing seals below and
welcome comments from fellow camaros.net participants.
I'm using a Fel-Pro BS40013 seal. The new seal will be lubricated with engine oil for installation using
the provided "shoe horn". The large sealing lip is towards the front of the engine. I will ensure the
mating ends of the two halves are cleaned of oil and no RTV is used on these seal halves. A small amount of black
RTV will be used on the bearing cap, applied to both mating surfaces. Outer bolts on 4 bolt cap are 65 ft-lb and
inner are 75 ft-lb. Note there may be a long period of time between installation of the seal and when the engine
is started - several weeks.
I have a one piece Fel-Pro OS34509T Perma-Dry oil pan gasket. This is the thin seal for use on the older pans
with the 5.5" by 2.25" front of pan depression. I will use a small amount of blue RTV at each of the four corners
on the block side where the pan transitions from the flat to the semi-circle depressions. It appears I will have
to buy some more 1/4" bolts since the ones I got from Classic are only 3/8" long and the pan gasket installation
tip recommends at least 5/8". The one piece gasket is 5/32" thick. Specified torque from the manual is 80 in-lb
for 1/4-20 and only 65 in-lb for 5/16-18, however I see higher specs on the larger bolts listed in other sources.
The pan gasket installation tip listed over 200 in-lbs for these corner bolts due to the metal grommets.
Another thing I am torn on is the pilot bearing. Based on what I have read in camaros.net the solid bearing
will work fine. However, I talked to someone the other day who tried hard to convince me to use a roller bearing.