Moroso Oil Pan and Gasket Question

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Offline daveh

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Moroso Oil Pan and Gasket Question
« on: September 02, 2016 - 10:43:20 AM »
Hey guys,

Ok weird question.  As some of you know I’ve been a Chevy guy for 25 years until I purchased my 71 convertible Challenger about 6 years ago.  In that time a lot has gone on and I’ve recently gotten back on it.  It’s back from paint and looks awesome and now I’m assembling the engine.  Last night I went to install the new oil pump, rear mail seal, new pickup, Moroso 7 quart pan with new hardware.  It’s a 340 and on the engine stand.  The rear main seals have the ears/tabs on it. 

I put a little of the Right Stuff under each end of the gaskets and above the gaskets where they meet the timing cover and rear cap.  It was a Moroso gasket set as well.  The rubber end gaskets went on fine.  The long rail gaskets rode up on the bearing cap and the timing cover.  They were a tad too long for my taste.  I had already laid down the RTV.  So in the middle of setting up I took a razor blade and trimmed each end down slightly so it would sit flat on the block.  Also the tab/ear on the rear main seal was sitting out under the cap and under the gasket and seemed like that would aid in leaking so I trimmed them off as well.  The tabs are still intact under the cap though.  I just did what I thought was the right trying to avoid any leaking after the engine is in the car. 

Is this a common thing that you guys do or do I need to redo it while the engine is still out?

Chevy blocks are easy you can throw a one piece gasket on there and call it a day.

Any thoughts and recommendations are really appreciated.  I just don’t feel like redoing this when it’s back in the car.  Thanks
Dave




Offline Oldschool

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Re: Moroso Oil Pan and Gasket Question
« Reply #1 on: September 02, 2016 - 10:52:49 AM »
I never use a gasket at all on any of my oil pan installs. RTV, install pan and bolt it up tight, wait 8-10 hours before adding oil to let the RTV cure. Pour in the oil and you are done - no leaks.....
Ken  --  In Georgia

MOPAR-------"Built To Run------Here To Stay"

Offline burdar

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Re: Moroso Oil Pan and Gasket Question
« Reply #2 on: September 02, 2016 - 11:58:43 AM »
Quote
I never use a gasket at all on any of my oil pan installs.

On a small block?  That's a pretty big gap at the front and rear if you don't have the thick rubber end seals in place.

Make sure your rear main seal is installed correctly.  The lip goes toward the "front".  Kind of backwards to how it seems like it should be.  I've got a rear main leak and I think I probably installed the seal the wrong way.  I also did a little reading and found out that a common place on small blocks to leak oil is between the block and the rear bearing cap.  A lot of people suggested putting a little rtv between the block and cap as well as a little on the ends of the seal.(so both halves of the seal are sealed together)

As far as the side gaskets... Yes, they seem to be a little long and the rubber ends seals on the pan hit them...keeping the pan from sitting down all the way.  I trim the ends so the rubber end seals sit down onto the block.  I put a little rtv in the corners before putting the pan on.
« Last Edit: September 02, 2016 - 12:03:35 PM by burdar »

Offline Oldschool

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Re: Moroso Oil Pan and Gasket Question
« Reply #3 on: September 02, 2016 - 12:19:48 PM »
On a small block?  That's a pretty big gap at the front and rear if you don't have the thick rubber end seals in place.


Sorry...   :roflsmiley:  I meant no gasket down the side rails. Just RTV down the sides and in the corners....      :thumbsup:
Ken  --  In Georgia

MOPAR-------"Built To Run------Here To Stay"