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Car Forum / Nissan / Nissan Z Cars / April 2005Oil Pan Gasket
I just put a new engine in my 1986 300ZX and it has been slightly modded, bored out 30 over and the heads rebuilt. I seem to have an issue with my oil pan gasket. It has blown out 2 times now. I still have the stock manifolds on for now, is it possile I am having to much back pressure? Thoughts? Darren Do a leakdown check of the cylinders. Either you have some really bad rings or your pan is not being installed correctly. > I just put a new engine in my 1986 300ZX and it has been slightly modded, > bored out 30 over and the heads rebuilt. I seem to have an issue with my oil > pan gasket. It has blown out 2 times now. I still have the stock manifolds > on for now, is it possile I am having to much back pressure? Thoughts? > > Darren I have checked the whole engine over and the oil is coming from the bottom back of the engine so I suspect either the oil pan gasket or a rear crank seal. > Do a leakdown check of the cylinders. Either you have some really bad > rings or your pan is not being installed correctly. [quoted text clipped - 5 lines] > > > > Darren > I have checked the whole engine over and the oil is coming from the bottom > back of the engine so I suspect either the oil pan gasket or a rear crank > seal. If you replaced tha pan gasket and it's still leaking, it's probably the rear seal..  SignatureSteve http://www.atlantaracing.com I replaced all of the seals before putting the engine in, just wondering if anyone has had any experiences with too much back pressuse blowing out the oil pan seal? > > I have checked the whole engine over and the oil is coming from the bottom > > back of the engine so I suspect either the oil pan gasket or a rear crank [quoted text clipped - 7 lines] > > http://www.atlantaracing.com > I replaced all of the seals before putting the engine in, just wondering > if anyone has had any experiences with too much back pressuse blowing out > the oil pan seal? By backpressure you mean exhaust back pressure? The car would have to run like total crap if this was so bad that it was making the crankcase pressure so high it was blowing out pan gaskets. If it is another failed pan gasket either you are using VERY poor quality gaskets or are overtightening them and ruining them. SignatureSteve http://www.atlantaracing.com Only Nissan parts, torque to service manual specs > > I replaced all of the seals before putting the engine in, just wondering > > if anyone has had any experiences with too much back pressuse blowing out [quoted text clipped - 11 lines] > > http://www.atlantaracing.com > Only Nissan parts, torque to service manual specs Then the gaskets can't be failing since you've done everything perfect... SignatureSteve http://www.atlantaracing.com lol that is why I'm trying to get some idea as to possible causes. Darren > > Only Nissan parts, torque to service manual specs > [quoted text clipped - 5 lines] > > http://www.atlantaracing.com |
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