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Gen3 Mopar Performance Intake #2295804
04/28/17 10:08 PM
04/28/17 10:08 PM
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cbusters Offline OP
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I purchased a P4510581 Mopar Performance intake for my 5.7 swap. This is the single 4150 carb version. I noticed the flange side has grooves cut like it uses o-rings. Gaskets I have found say to use flat gaskets on aluminum intakes and not the factory style with the seals on it. Which is correct? Also how to find an install kit with bolts and water outlet.

Re: Gen3 Mopar Performance Intake [Re: cbusters] #2296036
04/29/17 12:42 PM
04/29/17 12:42 PM
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ZIPPY Offline
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Oh, I remember that issue.

There are two versions of that particular manifold, EFI and carb.

Both versions are (or at least, were) machined for OEM stock 5.7 O ring style gaskets.

About two years after crate engines that used that intake started selling, through customer feedback, MP found certain blends of gas, with the carbureted versions of the intake, would "swell up" the O rings over very long term use.

Subsequent contact with the "intake gasket guy" at Chrysler proper + the OE supplier for the O rings confirmed: They are not intended for long term exposure to liquid gasoline. Short term and vapor is OK.

By then, another crate engine had been released, with the predecessor to the tall DP intake on it. It did not have the O ring machining....That engine had pink fiber gaskets. Spoke with engineer for that program, he knew what the deal was. There were similar 5.7 fiber gaskets set up in the product line "just in case".

At the time it would have been damn near impossible...like an act of Congress....to change the machining on the intake. Requiring a new blueprint, PPAP, and all that "OEM" stuff that most other folks who make intakes don't have to deal with... Chrysler was bankrupt at the time, and the only reasonable solution was to recommend fiber gaskets and leave the machining alone. So that's how it happened.

You actually "can" use the O rings over the short term, and it will run just fine for you, but over time they will break down and swell up...it kind of depends on how often you run it and other factors. Although they were intended for a "dry" manifold, they can handle fuel for awhile.

BTW the big threaded hole in front is where the oil goes, there's no water in a Gen3 intake.



Rich H.

Esse Quam Videri




Re: Gen3 Mopar Performance Intake [Re: ZIPPY] #2296107
04/29/17 02:27 PM
04/29/17 02:27 PM
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cbusters Offline OP
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Wow, oil in my water hole, showing my lack of knowledge aren't I. I got the 4150 intake to run an aftermarket EFI without fuel bars and I didn't want the injector openings either.

So, I run the o-ring gaskets and just keep an eye on them and be prepared to change them? We are going to drive the car a lot and take some cross country trips in it. What would you consider "over time"? Months, years, or miles?

Could I fill the o-ring areas with epoxy and run a flat gasket? Have you heard of this being done?

Do I visit a Chrysler Dealer to get manifold bolts for the early crate motor?

Also, do you know of anyone running the Indy tall valve covers on a b-body with a factory power brake booster? We are installing the engine from the bottom and can lower the k-frame if the valve cover ever has to come off in the future although I didn't think it would be a frequent maintenance issue.

I will try to figure out the oil filler on my own!

Re: Gen3 Mopar Performance Intake [Re: cbusters] #2297328
05/01/17 07:24 PM
05/01/17 07:24 PM
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dogdays Offline
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Find stock style gaskets made from gasoline resistant material, like FKM. Like this:

http://www.rockauto.com/en/moreinfo.php?...478&jsn=478

An initial glance shows little out there in the way of flat gaskets. Ask Roadhazard to make you some Superformance gaskets.


R.

Last edited by dogdays; 05/01/17 07:55 PM.
Re: Gen3 Mopar Performance Intake [Re: cbusters] #2297388
05/01/17 08:59 PM
05/01/17 08:59 PM
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72Swinger Offline
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Cometic has flat gaskets.


Mopar to the bone!!!
Re: Gen3 Mopar Performance Intake [Re: cbusters] #2297708
05/02/17 01:18 PM
05/02/17 01:18 PM
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ZIPPY Offline
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Pretty sure P5153757 is the one, but it's been a long time, double check before ordering.


Rich H.

Esse Quam Videri




Re: Gen3 Mopar Performance Intake [Re: cbusters] #2339194
07/18/17 04:39 PM
07/18/17 04:39 PM
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cbusters Offline OP
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Resurrecting this in hopes of finding a replacement oil filler cap for the MP intake. Mine is missing. Does anyone know of an interchange?

Re: Gen3 Mopar Performance Intake [Re: cbusters] #2340284
07/20/17 12:49 PM
07/20/17 12:49 PM
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72Swinger Offline
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I do not know what size, but im sure one that would work could be sourced. Doubt you would find a factory replacement without it also having an intake under it.


Mopar to the bone!!!
Re: Gen3 Mopar Performance Intake [Re: cbusters] #2340307
07/20/17 01:19 PM
07/20/17 01:19 PM
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ZIPPY Offline
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I don't think I kept a copy of the bill of materials for that one.

However if memory serves (and it very well be failing miserably so don't hold me to it), I think the oil cap is most likely the same one as used on Ansen/Keith Black/Mopar Performance Gen 2 hemi valve covers.

Possibly this one
https://www.summitracing.com/parts/dcc-5249949

Might want to go to Ansen and see if they will share any dimensions.


Rich H.

Esse Quam Videri




Re: Gen3 Mopar Performance Intake [Re: cbusters] #2340308
07/20/17 01:20 PM
07/20/17 01:20 PM
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ZIPPY Offline
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Did you ever find the fiber intake gaskets?
I found the part number the other day at home, if you still need it.

Re: Gen3 Mopar Performance Intake [Re: cbusters] #2340510
07/20/17 07:36 PM
07/20/17 07:36 PM
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cbusters Offline OP
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I have some flat gaskets, intake bolts and found that the oil filler opening is 1-1/2x12 thread.

Started researching the MP cap and it is showing discontinued at most places and doesn't show a size. So still checking on that.

Not much in the way of pictures to go on for this. There also seems to be an oil line that runs from the front of the intake and extends down the side and attaches to the rear of the intake.

Also have to figure out a PCV system.

Re: Gen3 Mopar Performance Intake [Re: cbusters] #2341517
07/22/17 04:09 PM
07/22/17 04:09 PM
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cbusters Offline OP
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It appears that the MP cap is the correct one, just discontinued. Now to find one!

cap.jpg
Re: Gen3 Mopar Performance Intake [Re: cbusters] #2341540
07/22/17 04:54 PM
07/22/17 04:54 PM
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Originally Posted By cbusters
It appears that the MP cap is the correct one, just discontinued. Now to find one!




That looks like the cap S&W and other install on their fab rear-ends. You might want to check with them.


1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: Gen3 Mopar Performance Intake [Re: cbusters] #2341566
07/22/17 05:58 PM
07/22/17 05:58 PM
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Medlock51 Offline
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Ask a dealer to do a search for you... might be one on a shelf somewhere.

Re: Gen3 Mopar Performance Intake [Re: Medlock51] #2341570
07/22/17 06:02 PM
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1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: Gen3 Mopar Performance Intake [Re: pittsburghracer] #2341571
07/22/17 06:03 PM
07/22/17 06:03 PM
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If so type in rearend cap in the search bar for lots of options.


1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: Gen3 Mopar Performance Intake [Re: cbusters] #2341573
07/22/17 06:06 PM
07/22/17 06:06 PM
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up yours
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up yours


They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
Re: Gen3 Mopar Performance Intake [Re: Supercuda] #2341622
07/22/17 07:50 PM
07/22/17 07:50 PM
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Re: Gen3 Mopar Performance Intake [Re: cbusters] #2341663
07/22/17 09:31 PM
07/22/17 09:31 PM
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cbusters Offline OP
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The Meziere is too large, it needs to be 1-1/2x12 but the others are good options. The Holley looks like it could be discreet enough to work. Thanks for the help.

Re: Gen3 Mopar Performance Intake [Re: cbusters] #2342138
07/23/17 09:14 PM
07/23/17 09:14 PM
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cbusters Offline OP
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Following with another question. What are these two openings on the intake? What goes there and how are they used?

One is on the front under the oil filler cap and the other is next to a runner in the rear.

DSCN0933.JPGDSCN0934.JPG
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