Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-20-2019, 11:13 PM   #1
Ensign
 
Join Date: Jul 2015
Posts: 13
Default Oil spraying out around the front oil pan gasket

I have a 94 Maxum, Mercruiser 4.3. Oil sprays out the corner of oil pan, near the front cover...only when it is driven. Engine # F43101N or the original tag of OF147556 (engine was replaced with a Vortex). I am looking to remove the oil pan and replace it along with the front cover gasket. Question is, do I really need to remove the engine? I can get under that engine pretty easily (I'm not a big person). I did see on a couple of forums that is was possible. Also, I do notice that the oil pressure stays at about 78 psi when cruising around...didn't know if that could have caused the gasket to fail.
__________________

loukywells is offline   Reply With Quote
Old 03-20-2019, 11:23 PM   #2
Ensign
 
Join Date: Aug 2018
Posts: 1
Default

If you replaced the engine does the new one have a plug in the hole that the crank sensor would normally go?
__________________

Brianmaxum3000 is offline   Reply With Quote
Old 03-20-2019, 11:31 PM   #3
Ensign
 
Join Date: Jul 2015
Posts: 13
Default

The crank sensor is there but nothing plugs to it. I could send a pic, but I don't know how.
loukywells is offline   Reply With Quote
Old 03-20-2019, 11:34 PM   #4
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 6,807
Default

The oil pump pickup hangs down to nearly the bottom of the oil pan so removing the pan will be almost impossible. Plus itís a lot easier aligning the new gasket with the engine out.
__________________
Mike
mmwjr is offline   Reply With Quote
Old 03-20-2019, 11:37 PM   #5
Ensign
 
Join Date: Jul 2015
Posts: 13
Default

How hard is it to pull an engine?
loukywells is offline   Reply With Quote
Old 03-21-2019, 04:30 AM   #6
Lt. Commander
 
MoonRiver's Avatar
 
Join Date: Oct 2017
Location: Spokane, WA
Posts: 140
Default

You kind of need access to an overhead lift, but once you have that figured out lifting the engine is pretty straight forward.
MoonRiver is offline   Reply With Quote
Old 03-21-2019, 11:39 AM   #7
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 6,807
Default

Quote:
Originally Posted by loukywells View Post
How hard is it to pull an engine?
Under Documents of this site you can find the mercruiser manual for you engine and in it list the procedure to remove the engine.

In a nut shell.
1. Remove outdrive.
2. Disconnect all electrical to the engine. (Harness connector, Battery negative and positive connections)
3. Disconnect fuel connection
4. Disconnect exhaust
5. Disconnect throttle and shift cables
6. Unbolt front and rear engine mounts
7. Lift engine out (You'll need to figure this out depending on you resources).
__________________
Mike
mmwjr is offline   Reply With Quote
Old 03-21-2019, 01:07 PM   #8
Commander
 
jrsick's Avatar
 
Join Date: Oct 2011
Location: Chesapeake, VA
Posts: 298
Default

loukeywells, I believe high oil pressure is the cause of your problem. Oil spraying from a seal is indicative of high crankcase pressure. High pressure is also likely the reason you are replacing the front cover gasket and I assume oil seal.
78psi is high oil pressure, but you should confirm with a test gauge. Most car parts stores will lend one to you. Remove oil pressure sender and plug it in there.
Download the manual for your engine from the documents sections, and check oil pressure range in the tune up specifications. If you have high pressure then first step is to replace the oil filter and be sure you have correct oil viscosity. I suspect that culprit is oil relief valve, listed as 'valve assembly-filter". This valve reduces oil flow to engine pump at high rpms. Without this reduction the oil pump will pressurize the crankcase.
You will need to address the leaking oil pan gasket. You may be able to re-position the gasket with the engine installed if the gasket is still pliable. Back off, but don't remove the oil pan bolts on the stern side of the oil pan. Remove all of the others and lower the pan slightly. Re-position the gasket and add RTV as necessary.
__________________
2006 Bayliner BR205
A1 Gen 2 1.47
5.0 carb engine
jrsick is offline   Reply With Quote
Old 03-22-2019, 12:26 PM   #9
Lt. Commander
 
Join Date: Dec 2015
Location: Florida
Posts: 151
Default

Assuming that the right viscosity oil is used, specs call for 30-70 psi@2000 RPM. 78 is high but not too far outside spec (not counting the notorious inaccuracy of the dash gauges).

4.3's have had issues with oil pan sealing. I believe they have been revised a few times to eliminate cracking/deforming that was reported after 100-150 hrs of operation. I don't have any tech bulletins, but it may be a topic to research.
__________________

jparsons121 is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Powered by vBadvanced CMPS v3.2.3

All times are GMT. The time now is 02:09 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.