The Ford Barn

Clem Clement · 09-13-2017, 03:34 AM

The trailer queen I'm working had fairly clear oil. After several laps around the block the oil is very dark. Engine has had 500 miles in the last 20 years. No oil filter. I've heard several options for flushing. suggestions, please. I don't like the idea of a kerosene flush due to the low viscosity of the kero.

lotsagas4u · 09-13-2017, 05:22 AM

You probably don't want to hear this, but forget the flush. Pull the pan and clean it out.

tubman · 09-13-2017, 05:38 AM

I agree. There was a thread (either here or on the H.A.M.B.) a few weeks ago that made a pretty good case against engine flushing.

flatheadmurre · 09-13-2017, 05:59 AM

That the engineoil gets dark means it´s doing the job...
If it was my car and it ran fine...i would just make sure it would go for some longer trips from time to time, change the oil frequently and drive it...
Starting to poke around in an engine without oilfilter means you have to get it real clean or anything loose will be in the oilflow which can cause more issues then it solved...

Big-Foot · 09-13-2017, 07:24 AM

Do a leakdown test of the cylinders and you'll likely find that the oil is black from blow-by...
IE - Exhaust soot and unspent fuel.

I would change the oil and run the engine through a break-in cycle or two and see if the blow-by gets any better. It may take many miles to get those rings friendly with the cylinders, if they ever do...

Many builders used chrome faced rings back in the day - thinking they were using the best. And they were. However, chrome rings required the cylinder bores to be perfectly round and if you just honed out an egg shaped standard cylinder - well - you would likely never get a perfect seal.

Clem Clement · 09-13-2017, 04:24 PM

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thanks.

JSeery · 09-13-2017, 06:33 PM

The engine really needs/needed to be run under a load to seat the rings. If the break in was not done correctly it may be difficult to ever get them to seat properly.

09-13-2017, 03:34 AM	#1
Clem Clement Senior Member Join Date: May 2010 Location: Fairfax, VA Posts: 3,393	engine flush The trailer queen I'm working had fairly clear oil. After several laps around the block the oil is very dark. Engine has had 500 miles in the last 20 years. No oil filter. I've heard several options for flushing. suggestions, please. I don't like the idea of a kerosene flush due to the low viscosity of the kero.

09-13-2017, 05:22 AM	#2
lotsagas4u Senior Member Join Date: Apr 2011 Location: Plainview, Texas Posts: 757	Re: engine flush You probably don't want to hear this, but forget the flush. Pull the pan and clean it out.

09-13-2017, 05:38 AM	#3
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 10,303	Re: engine flush I agree. There was a thread (either here or on the H.A.M.B.) a few weeks ago that made a pretty good case against engine flushing. Last edited by tubman; 09-13-2017 at 10:20 AM. Reason: "adree" ??

09-13-2017, 05:59 AM	#4
flatheadmurre Senior Member Join Date: Apr 2015 Location: Sweden Posts: 3,045	Re: engine flush That the engineoil gets dark means it´s doing the job... If it was my car and it ran fine...i would just make sure it would go for some longer trips from time to time, change the oil frequently and drive it... Starting to poke around in an engine without oilfilter means you have to get it real clean or anything loose will be in the oilflow which can cause more issues then it solved...

09-13-2017, 07:24 AM	#5
Big-Foot Member Join Date: Nov 2016 Location: Kenyon MN/Gold Canyon AZ Posts: 64	Re: engine flush Do a leakdown test of the cylinders and you'll likely find that the oil is black from blow-by... IE - Exhaust soot and unspent fuel. I would change the oil and run the engine through a break-in cycle or two and see if the blow-by gets any better. It may take many miles to get those rings friendly with the cylinders, if they ever do... Many builders used chrome faced rings back in the day - thinking they were using the best. And they were. However, chrome rings required the cylinder bores to be perfectly round and if you just honed out an egg shaped standard cylinder - well - you would likely never get a perfect seal. __________________ Regards - Randy 1933 Tudor

09-13-2017, 04:24 PM	#6
Clem Clement Senior Member Join Date: May 2010 Location: Fairfax, VA Posts: 3,393	Re: engine flush Sponsored Links (Register now to hide all advertisements) thanks.

09-13-2017, 06:33 PM	#7
JSeery Member Emeritus Join Date: Nov 2012 Location: Wichita KS Posts: 16,132	Re: engine flush The engine really needs/needed to be run under a load to seat the rings. If the break in was not done correctly it may be difficult to ever get them to seat properly.