Engine rebuild

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19 Feb 2006 16:36 #4394 by Lance
Engine rebuild was created by Lance
Well....Now that the old girl is to the point where she starts easily and runs/idles fine .....I have to face the fact that I'm seeing blue smoke. What can I expect to pay for a straight eight rebuild(1931)? Thanks Lance

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20 Feb 2006 00:16 #4395 by
Replied by on topic Engine rebuild
Lance,

Before you go for an engine rebuild have you run some checks on the engine? You may have some minor problem and be able to get off a lot cheaper then an engine rebuild.

Some clues to think about...

How's the oil pressure?
Run a vacuum test.
Check the compression.
Does the blue smoke start right away or does it take some time to build up. How much smoke is there? Does it get better or worse as the engine warms up?
What do the spark plugs look like...which cylinder is smoking?

I have no idea what an Auburn engine rebuild costs these days, but I'm sure someone on here can give you an idea.

Jim

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20 Feb 2006 23:27 #4398 by Lance
Replied by Lance on topic Engine rebuild
Jim
Thanks for the response . I talked to my mechanic friend ....He wanted to know if the engine uses valve seals? He told me that in more modern engines if the seals go bad you get smoke . Are there valve seals in these engines that deteriorate over time ( The 31 sat in the garage for 20 years)and if so can they be replaced and who would carry them if available ? We are also going to do a smoke test on each cylinder.
I know the family (well) who sold me the car and all parties swear that the car didnt smoke. There is only negligible smoke at idle ...almost none. Its when you rev up the engine that you get some blue smoke.
Also as the "new guy" I need to ask if its appropriate to ask all these questions on this forum .
Thanks again ................Lance

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21 Feb 2006 00:49 #4399 by
Replied by on topic Engine rebuild
Hi Lance,

First...yes it's OK to ask all these questions in this forum, that's what it's all about...sharing information.

Second I'm a Cord guy ( I guess all the Auburn guys are hibernating) so I don't know much about the '31 engine. I can just help with some general info. I'm also the guy who asks the dumb questions, so I'll ask a few more...

Before you started up the engine did you pull the oil pan and valve cover? was there any sludge in there? I've seen several cars that sat for many years that had plugged or partially plugged oil drain holes from the valve area down to the pan. They would be fine for a few minutes untill the oil level rose around the valve stems then the oil would pour in and the engine would smoke like hell!!!

It's also possible you have a stuck piston ring. When the engine is reved up it throws some oil up on the cylinder walls. If the rings don't wipe it off the oil will burn in the combustion process and smoke.

If other checks show nothing seriously wrong (oil pressure, etc.) I'd try a trick a few old timers I know swear by. Put a quart of Marvl Mystery Oil in the crankcase(don't overfill it...also in larger crankcases you may need two quarts. Put some more Marvel Mystery oil in the gas tank (per the instructions). Then go fo a nice long joy ride and beat the car down the road. Run at high speed for a while, Accelerate hard, decelerate hard, etc.

After you get back change the oil while the engine is still hot (or at least warm). I know a couple of very good mechanics that have been around a lot longer then I have and driven many more miles that swear by this. They claim Marvel Mystery Oil cures a lot of ills in engines. I cann't argue with success.

Hopefull a few of the Auburn guys will take a break from thier "long winters nap" and chime in here.

Good luck and let us know how you make out...don't forget the Spring Meet, we'd love to see you and the car.

Jim

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21 Feb 2006 00:52 #4400 by Donald H. Ankney
Replied by Donald H. Ankney on topic Engine rebuild
Dear Lance,

If your "mechanic" doesn't know any more than this I would run, not
walk, from his shop and not look back.

Don

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21 Feb 2006 16:21 #4403 by Kees Richie
Replied by Kees Richie on topic Engine rebuild
Dear Lance,

Even after a rebuild, my 32 8100 is smoking a little bit when taking off from idle. Do the Mystery Oil trick and then change to Shell Rotella 20W-40 oil.

As long as you do not produce smoke screens at 50 mph, no clunking noises coming from the engine, and adequate oil pressure, do not worry.

Rebuild costs hover between 8 and 10 k these days.

8 cylinder nut

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