New engine using too much oil
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New engine using too much oil
352 rebuilt to a 410. Used Edelbrock heads, did all the oil mods and using a high volume oil pump. Only about 500 miles on it since rebuild and it is using a quart of oil every 100 miles or so. The engine guy thinks its getting too much oil up in the heads and added the .060" jet in the oil hole in the head to restrict it. That didn't seem to make much difference so he put a cotter pin in the hole to further restrict it. Didn't help much either. Iv'e heard of new engines using a lot of oil until the rings seat but this seems to be way too much for that. Anybody got any suggestions?
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From: Grain Valley Mo.
The first thing I ask anybody who tells me that story: are your valve covers baffled? I had the same thing happen with a 460 rebuild and about went broke trying to figure it out. I used aftermarket valve covers with no baffle under the PCV valve and it was sucking oil right into the carb.
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XFM....
'53 F100
390-C6
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XFM....
'53 F100
390-C6
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The valve covers are baffled.
It does smoke when I get on it but haven't really noticed if it smokes when I'm decelerating. Defently smokes a lot when I stomp on it.
Rings are Speed Pro Moly Rings
It does smoke when I get on it but haven't really noticed if it smokes when I'm decelerating. Defently smokes a lot when I stomp on it.
Rings are Speed Pro Moly Rings
Cargo Master
Joined: Aug 2000
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From: SW Michigan
oil burning
D-Wolf, couple of things. What did you do to break in the rings ? What was the surface finish on the bores ? Do you have the splash baffle under the rockerstands ? Do your heads have valvestem seals ? Don't laugh, I have seen many an engine assembled by a supposed 'pro' that didn't have them. I once purchased a '69 F250 for 250$ . The owner sold it cheap in desparation because his freshly rebuilt engine used about a quart per 20 miles. He wouldn't tell me who did the engine ( I suspect it was himself ). He didn't have any stem seals, and forgot the valvespring baffle. For less than 20$ of repair, I had a nice engine that we drove everyday for almost 8 yrs. That engine was later stroked out to a 421 and is in my '71 4wd now. But at the shop I'm with we see lots of Ford cylinder heads assembled incorrectly. It would seem there are a lot of shops that do so many chevys, when they get a Ford, they don't know how to do it properly. It is particularly a problem with FEs, which are usually older than the kid working on it. DF
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Fleet Owner
Joined: Jan 2004
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From: Brentwood,CA
Rings are Speed Pro Moly Rings
that is your problem right there. moly rings do not belong in you engine they require a special finish hone to use them and i doubt that hone was done. cast rings are best
that is your problem right there. moly rings do not belong in you engine they require a special finish hone to use them and i doubt that hone was done. cast rings are best
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Cargo Master
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From: SW Michigan
oil burning
F3GH, what is it that you don't like about moly rings ? We ( the shop I'm with ) use them in everything and have NEVER had set that went bad or failed to seat. I got mine to seat in less than 5 miles. Are you thinking of chrome rings ? DF, @ his Dad's
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Before we condemn the rings are we sure your not pulling oil thru slight leaks in the intake manifold gaskets. Might be worth a try to retorque it. Valve stem oil seals smoke after a short idle time when the engine is accelerated, rings on decelleration, sounds like you have both. Unless they did not stager the ring gaps I would doubt it was the rings, the shops know which finish to use for which rings.
FE "Freakin Expensive"
Joined: Dec 2003
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From: Smith Mountain Lake, VA
Well just to chime in here a second!! If your machine shop prep the cylinders for cast rings and used moly rings in there it will take forever and a day to seat the rings and overall damage the cylinders!!
A Cylinder prep for Moly rings has almost a glass finish to it...and the ring seat real quick or not at all.... Most guys that know there salt about doing a Moly ring finish on the Cylinders usually run 4 to 5 Different Stone's thru the cylinders to get a almost mirror finish!! JMO!! on rings and Cylinders...
Russ
A Cylinder prep for Moly rings has almost a glass finish to it...and the ring seat real quick or not at all.... Most guys that know there salt about doing a Moly ring finish on the Cylinders usually run 4 to 5 Different Stone's thru the cylinders to get a almost mirror finish!! JMO!! on rings and Cylinders...
Russ
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So basically it boils down to head issues or ring issues. I expect the guy that did mine did the proper finish for the moly rings, but I didn't see it so I don't know. He aslo made a point of getting the splash baffles from me, I had partially disassembled the old engine before I decided I wanted someone else to do the build. So its probably something to do with the valve seals which is what they are thinking. Too much oil coming up into the rocker covers, pooling up and basically drowning the valve seals. Does that make since? And itf that's the case, how much restriction would be advised for that oil hole in the head? Also whats the best way to seat the rings? I put the first 300 miles or so on it by never keeping it for very long at any RPM. If I went out on the highway I'd vary my speed from about 50 to 75 and back and forth. I've got 500 miles on it now and have stopped doing that.