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Is Seafoam or Marvel Mystery Oil better for un-sticking stuck valves?
Posted by: rnch ()
Date: June 18, 2012 07:00PM

and...should i pour it down the carbs and/or add some to the gas tank and engine oil?? Pour (thru the carbs) just a trickle or steadily increase the volume until the car stalls out?

Then let it sit overnight and go drive it the next day?



Edited 1 time(s). Last edit at 06/18/2012 07:02PM by rnch.

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Re: Is Seafoam or Marvel Mystery Oil better for un-sticking stuck valves?
Posted by: MattNall ()
Date: June 18, 2012 07:34PM

Ranch.. all been written a dozen times.. try searching.. everyone has their opinions..


Follow the instructions on the containers when all else fails!!! gg





MODERATOR
Somewhere between Sea Mountain and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
.............................PG...................................Turbo

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Re: Is Seafoam or Marvel Mystery Oil better for un-sticking stuck valves?
Posted by: rnch ()
Date: June 18, 2012 08:07PM

Matt, I did a thorough search here, read everyone's differing opinions....just wanted to give our members a chance to add their 2 cents.

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Re: Is Seafoam or Marvel Mystery Oil better for un-sticking stuck valves?
Posted by: MattNall ()
Date: June 18, 2012 08:15PM

rnch.. the same guys will answer... not everyone has done this.. nothing new will be said...


Both are good products...


Are you sure you have a stuck / sticking valve?

I would just pour a can of MMO in the gas tank and drive on... that will clean and lube the whole intake / fuel system.





MODERATOR
Somewhere between Sea Mountain and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
.............................PG...................................Turbo

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Re: Is Seafoam or Marvel Mystery Oil better for un-sticking stuck valves?
Date: June 18, 2012 08:27PM

Take the Rocker cover off and spray strong carburetor cleaner on the offending valve stem, repeat several times. Then using a soft metal interface, tap on the valve stem to free it up.
If it's truly stuck, it's going to take some physical force to un-stick it.

To help prevent the problem, run fuel cleaner such as Techron, etc in the gas.
The problem comes from deposits from fuel on the valve stem as it moves out of the guide.




Corvanatics
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1966 Corsa Turbo coupe ~ ~ 1966 140 Corsa ~ 65 Monza 140/4 'Vert Sierra Tan/Fawn (my current driver!!)
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Re: Is Seafoam or Marvel Mystery Oil better for un-sticking stuck valves?
Posted by: jimmyo ()
Date: June 18, 2012 08:30PM

Matt's wrong! I would use Seafoam!...ggggg Only kidding! I've used seafoam with good results, but I have friends that swear by MMO. Some in the gas and I've de-carboned with it.

Jim O'Connor
45 miles north of The Bronx, N.Y.
1962 Greenbrier 110 4spd
1964 Monza Convertible 110 PG
"Wherever you go....There you are"


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Re: Is Seafoam or Marvel Mystery Oil better for un-sticking stuck valves?
Posted by: gmorphan ()
Date: June 18, 2012 09:32PM

I've never seen a "stuck" valve that didn't need some other major work. eye rolling smiley

However, I have seen where a pint of MMO in the gas tank did wonders for other ailments. winking smiley

Bob Manwaring, Kingston, TN

'69 500 Coupe #1432

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Re: Is Seafoam or Marvel Mystery Oil better for un-sticking stuck valves?
Posted by: john ackley ()
Date: June 19, 2012 02:58AM

seafoam the shit out of it, then add a quart of mystery oil to your gas and crank case. both will do a little different thing, but your car will love you for it

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Re: Is Seafoam or Marvel Mystery Oil better for un-sticking stuck valves?
Posted by: lowandslow ()
Date: June 19, 2012 03:42AM

MMO in the oil did a great job of clearing up a sticky lifter for me. Good stuff.

Patrick McGhee
1963 SortaSpyder convertible
Weatherford, Texas

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Re: Is Seafoam or Marvel Mystery Oil better for un-sticking stuck valves?
Posted by: rnch ()
Date: June 19, 2012 07:39PM

john ackley Wrote:
-------------------------------------------------------
> seafoam the shit out of it, then add a quart of
> mystery oil to your gas and crank case. both will
> do a little different thing, but your car will
> love you for it





Hmmmmmm........perhaps so.

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Re: Is Seafoam or Marvel Mystery Oil better for un-sticking stuck valves?
Posted by: stitch ()
Date: June 20, 2012 03:29AM

ALSO, a bit of "Restore" in the tranny And she wood give ya good purrr... before she does 'love you for it'

"If you can't fix it with a Hammer, you have an Electrical problem."
Stitch...
Schertz, Texas.
(Smallish town/burg 17 mi. NE of San Antonio)

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