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Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
Weird oil leak. Imagine that.
- Thread starter milomind
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[ QUOTE ]
After doing 95mph down the highway to meet a guy about a new hood for my 72 MGB, I suffered a weird oil leak between my engine and the gearbox. It's coming from the engine. I know because my oil pressure was very low, and after checking, nearly out. I refilled and did a "liquid" fix of some leak stop thickener. It slowed, but I'm not ready just yet to put her up for the winter, for her nearly annual engine pull(gotta learn to love it!). Rear main? that's my bet. Any advice?
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Speeding or no speeding...still no word on that rear main.
'milomind', I won't comment on speed, but can only hope that your original query will at some point be addressed.
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Carl,
The whole first post was so "far out" that I didn't know what to say.
Milomind,
The rear main "could" be the source of the leak. You don't say whether the engine oil level was already low before the "run" or not. I suspect that it was. Running with low oil pressure, has likely done permanent damage to the engine. Most MG's were not designed to run 95 mph down the highway. I don't know what a "liquid fix" is, but there is nothing that you can put in an engine to fix an oil leak that will not cause much worse problems. I certainly would not run the engine any more until it is "really" fixed. Completely pulled down & all parts checked. Sorry that you had problems.
D
After doing 95mph down the highway to meet a guy about a new hood for my 72 MGB, I suffered a weird oil leak between my engine and the gearbox. It's coming from the engine. I know because my oil pressure was very low, and after checking, nearly out. I refilled and did a "liquid" fix of some leak stop thickener. It slowed, but I'm not ready just yet to put her up for the winter, for her nearly annual engine pull(gotta learn to love it!). Rear main? that's my bet. Any advice?
[/ QUOTE ]
[ QUOTE ]
Speeding or no speeding...still no word on that rear main.
'milomind', I won't comment on speed, but can only hope that your original query will at some point be addressed.
[/ QUOTE ]
Carl,
The whole first post was so "far out" that I didn't know what to say.
Milomind,
The rear main "could" be the source of the leak. You don't say whether the engine oil level was already low before the "run" or not. I suspect that it was. Running with low oil pressure, has likely done permanent damage to the engine. Most MG's were not designed to run 95 mph down the highway. I don't know what a "liquid fix" is, but there is nothing that you can put in an engine to fix an oil leak that will not cause much worse problems. I certainly would not run the engine any more until it is "really" fixed. Completely pulled down & all parts checked. Sorry that you had problems.
D
Missouri722
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Good point, Milomind. In my earlier post (before the war started), I noted the rear main as the most likely culprit. Been a while since I rebuilt a B engine, but the rear main seals push into place around the rear of the engine and I don't recall if they were before or after the transmission plate. If one of them gets loose, you could probably lose a lot of oil in a hurry. At least it seems possible even though I've not experienced it.
Second point, you may not have hurt the engine that much. The 1800s are tough little engines (probably get another war started over that statement, but I think I'll make this my last post at this site anyway). With 5 mains and an internally balanced crank, my experience has been cylinder wall wear enough to need overhaul at 75,000, but only polishing the crank required. Connecting rods and other bearings hold up well also. At 150,000, the crank will need machining. I haven't overhauled anything later than a 72 and the cylinder wear may not be as excessive in the later 3 ring versions versus the older 4 ring high compression engines.
You likely are in for an engine teardown though just to repair the oil leak. Good luck and enjoy that little beast.
Second point, you may not have hurt the engine that much. The 1800s are tough little engines (probably get another war started over that statement, but I think I'll make this my last post at this site anyway). With 5 mains and an internally balanced crank, my experience has been cylinder wall wear enough to need overhaul at 75,000, but only polishing the crank required. Connecting rods and other bearings hold up well also. At 150,000, the crank will need machining. I haven't overhauled anything later than a 72 and the cylinder wear may not be as excessive in the later 3 ring versions versus the older 4 ring high compression engines.
You likely are in for an engine teardown though just to repair the oil leak. Good luck and enjoy that little beast.
G
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Re: Spell the name right, please!
My MGB doesn't mind traveling at 90+ mph for extended periods of time.
My MGB doesn't mind traveling at 90+ mph for extended periods of time.
Frazier
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This has become ridiculous. We have a relatively new member who asks a serious question of this august group, expecting some constructive help. He mentions that the car has just been run hard, and has a new oil leak, not experienced before, and wonders if anyone in the group can give some guidance. He then gets a lecture, which in his situation is entirely undeserved, and a number of sarcastic responses. This is not the intended spirit of this forum as I have come to understand it.
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Good point, Milomind. In my earlier post (before the war started)
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And I hearby declare a truce /ubbthreads/images/graemlins/hammer.gif
Good advice, however, not to trash the engine with such high-speed trips. I would definitley do as has been suggested and get it "really" fixed or you might spin a bearing or toss a rod.
Basil
Good point, Milomind. In my earlier post (before the war started)
[/ QUOTE ]
And I hearby declare a truce /ubbthreads/images/graemlins/hammer.gif
Good advice, however, not to trash the engine with such high-speed trips. I would definitley do as has been suggested and get it "really" fixed or you might spin a bearing or toss a rod.
Basil