Valve guide wear
12-04-2006, 11:05 AM
#1
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Valve guide wear
Just wondering
My buddy has a old 454 engine that he has to put Marvel Mystry oil in the gas to run to lube the valves or it clanges like hell.
I was wondering if this would help the 993 valve guide wear problem if I were to add a little every now and then?
My thought is it should help the valves. BUT What will it do to the emissions system?
Would I be creating more problems than solving? My guess is it would create more problems than it would solve, but I thought I'd put it out for debate.
My buddy has a old 454 engine that he has to put Marvel Mystry oil in the gas to run to lube the valves or it clanges like hell.
I was wondering if this would help the 993 valve guide wear problem if I were to add a little every now and then?
My thought is it should help the valves. BUT What will it do to the emissions system?
Would I be creating more problems than solving? My guess is it would create more problems than it would solve, but I thought I'd put it out for debate.
12-04-2006, 07:46 PM
#3
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I used MMO for top end lubricants before, but in cars without O2 sensors as I never knew what if would do to it. Same goes for MAF sensors.
12-04-2006, 08:36 PM
#5
MMO is like running auto trans fluid in the oil. It does a good job in cleaning traditional engines. I don't see how it would help guide seals, so would not want to think what it may do with a Porsche engine. The only additive I would put in a Porsche are fuel injection cleaners in gas tank, specifically BG-44 or Techron.
12-04-2006, 10:37 PM
#6
Race Director
Old trick to quiet engine was to put gear lube in crankcase...
Originally Posted by slider172
Just wondering
My buddy has a old 454 engine that he has to put Marvel Mystry oil in the gas to run to lube the valves or it clanges like hell.
I was wondering if this would help the 993 valve guide wear problem if I were to add a little every now and then?
My thought is it should help the valves. BUT What will it do to the emissions system?
Would I be creating more problems than solving? My guess is it would create more problems than it would solve, but I thought I'd put it out for debate.
My buddy has a old 454 engine that he has to put Marvel Mystry oil in the gas to run to lube the valves or it clanges like hell.
I was wondering if this would help the 993 valve guide wear problem if I were to add a little every now and then?
My thought is it should help the valves. BUT What will it do to the emissions system?
Would I be creating more problems than solving? My guess is it would create more problems than it would solve, but I thought I'd put it out for debate.
These kinds of additives are not going to keep valves/guides from wearing out, but will help quiet them.
Best way to avoid or stand the best chance of avoiding excessive/premature valve guide, stem wear is to use a quality oil of the proper viscosity and grade, change oil/filter regularly (and probably more often than factory recommends).
If vehicle sees severe usage: lots of stop/go, idling, short trips, track time; this useage would call for an even more agressive oil/filter change schedule.
Use a fuel injector cleaner a tank or two before every oil/filter service and run the best grade and highest octane gasoline available in your area.
No need to search out and run 100 octane gasoline, but a quality premium is, dare I say it, good enough, best you can use on a regular basis.
Sincerely,
Macster.
12-04-2006, 10:40 PM
#7
RL Technical Advisor
The problem with the Porsche guides is not lubrication-related; its based on inconsistent & poor fitment at the factory as well as their choice of guide materials.
MMO is neat stuff for what it was intended for but IMHO, it has no application in a 911 motor.
MMO is neat stuff for what it was intended for but IMHO, it has no application in a 911 motor.
