Intake valley pan with oil Mod. on 401

[dcarroll38732]

I'm going to do an oil mod. on my 401. I hear that the line gets in the way of the intake manifold gasket. Can I cut that piece off. What is it on there for anyway.

[Al Johnson]

If you keep the oil line low in the valley, you can use the valley pan gasket. You just have to bend it up a little in the front where the oil line is higher to go into the front of the block. I did, works fine.

[Jeepadilly]

Al...I have heard others say that this mod is not nec on our rigs due to low rpm requirements of the Jeep...What is your opinion on this as I am planning to do the mod myself when I rebuild Bear's engine....Happy Star!!!!

[ June 29, 2003, 12:24 AM: Message edited by: Jeepadilly ]

[Wesdog]

Originally posted by Al Johnson:
If you keep the oil line low in the valley, you can use the valley pan gasket. You just have to bend it up a little in the front where the oil line is higher to go into the front of the block. I did, works fine.That's how I did mine, low profile using steel 3/8" tubing and brass fittings. Valley pan fits fine with a small tweak in the front. Didn't use the Performance American Style kit for this exact reason. See photos in post: http://www.ifsja.org/ubb/ultimatebb.php?ubb=get_topic;f=2;t=020051#000013

Wes

Here's the pan installed and you can see the small tweak in the front to clear the oil line:
http://www.fullsizejeeps.com/jeeps/files/Misc-Pictures/401_Pan_Gasket1.jpg

[ June 29, 2003, 10:14 AM: Message edited by: Wesdog ]

[Wesdog]

If you install the bypass be sure to fully prime and pressure test the oiling system BEFORE installing the valley pan gasket intake manifold. Check carefully for leaks in the new oil line. My recommendation is not to do this mod for a normal FSJ application, you don't need it and if it isn't done correctly it can do great harm. I may even remove and plug mine when I swap to an EFI intake manifold. Just my opinion. Wes

[dcarroll38732]

Since it is just a race truck and shouldn't be running no longer than 10 minutes at a time, do I really need the whole pan. Can I cut it off or should I buy an intake gasket set that has two seprate intake gaskets?

[Wesdog]

Originally posted by dcarroll38732:
Since it is just a race truck and shouldn't be running no longer than 10 minutes at a time, do I really need the whole pan. Can I cut it off or should I buy an intake gasket set that has two seprate intake gaskets?Why don't you ask the guys on the AMC forum:
http://www.amcforum.net/forums/
They are more in tune with the racing world. What intake manifold are you using and do you have the stock heat shield installed on the bottom of it so you don't suck oil into the PCV system? As long as you have that shield installed you can probably do without the valley pan gasket for your application. Consult with the AMC forum for more info. Wes

[Al Johnson]

Originally posted by Jeepadilly:
Al...I have heard others say that this mod is not nec on our rigs due to low rpm requirements of the Jeep...What is your opinion on this as I am planning to do the mod myself when I rebuild Bear's engine....Happy Star!!!!I'd have to agree that it's not necessary. On the other hand, lot's of stuff that's not necessary is desirable to some people for their own reasons. I did it on mine for insurance against failure of the bearings, just in case. I've gone a bit past stock, without going to a race or even hot street engine level, but still... I plan to turn a few RPM on occasion. It's all relative, my redline will be 5500, but that's me.