Intake Manifold Crossovers - The 1947 - Present Chevrolet & GMC Truck Message Board Network

angelsairman · 06-11-2004, 11:20 PM

I had posted a month or so ago about my new engine leaking antifreeze into my oil. It was suggested that the intake gaskets were the culprit. I just got back from a deployment and changed them out yesterday. So far it seems to not be leaking the coolant into the oil. I didnt notice before but the intake manifold has no rear coolant crossovers but the heads do. Its an edelbrock Performer RPM manifold. It looked to have been leaking the coolant at the rear where there were no crossovers. Is this a common thing on aftermarket intakes??

72 CustomCamper · 06-11-2004, 11:24 PM

Yeah, stock intakes too...

Chuck

jhow66 · 06-11-2004, 11:51 PM

Just make sure you troque the bolts evenly. No small block manifold has the rear crossover-made this way so heads will work on either side.

72C203503ONTHETREE · 06-11-2004, 11:54 PM

If you get an aftermarket racing manifold, they will use the rear water ports to help the engine run cooler. They run pipe(and hose) from the raer water ports to the fronts, supposed to cool the engine better under power. Brodix and many other have the rear water ports all ready opened and tapped new.

angelsairman · 06-12-2004, 12:38 AM

thanks for the input guys! Just had me kinda baffaled as i had never noticed them not being there before.

06-11-2004, 11:20 PM	#1
angelsairman Future Owner Join Date: Jul 2003 Location: Grand Forks AFB, ND Posts: 151	Intake Manifold Crossovers I had posted a month or so ago about my new engine leaking antifreeze into my oil. It was suggested that the intake gaskets were the culprit. I just got back from a deployment and changed them out yesterday. So far it seems to not be leaking the coolant into the oil. I didnt notice before but the intake manifold has no rear coolant crossovers but the heads do. Its an edelbrock Performer RPM manifold. It looked to have been leaking the coolant at the rear where there were no crossovers. Is this a common thing on aftermarket intakes?? __________________ Its not the end result that counts most...its the journey along the way that's most rewarding My truck doesn't leak, it just marks it's territory

06-11-2004, 11:24 PM	#2
72 CustomCamper huh ??? Join Date: Nov 2002 Location: Fredericksburg,Va. Posts: 3,368	Yeah, stock intakes too... Chuck __________________ 90 Blazer Silverado 350w/ 700R4 and 32" Kelly's "I am a bomb technician. If you see me running try to keep up!"

06-11-2004, 11:51 PM	#3
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	Just make sure you troque the bolts evenly. No small block manifold has the rear crossover-made this way so heads will work on either side. __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer

06-11-2004, 11:54 PM	#4
72C203503ONTHETREE Registered User Join Date: Apr 2004 Location: Grant, Alabama Posts: 504	If you get an aftermarket racing manifold, they will use the rear water ports to help the engine run cooler. They run pipe(and hose) from the raer water ports to the fronts, supposed to cool the engine better under power. Brodix and many other have the rear water ports all ready opened and tapped new. __________________ 72 Chevy C20, SOLD (Dang it.) 09 Challanger RT six speed in all black. 74 Datsun 710 wagon, all 1.8 liters of screaming Datsun power. 73 C10 long bed, 350/350 combo, nice shape.

06-12-2004, 12:38 AM	#5
angelsairman Future Owner Join Date: Jul 2003 Location: Grand Forks AFB, ND Posts: 151	thanks for the input guys! Just had me kinda baffaled as i had never noticed them not being there before. __________________ Its not the end result that counts most...its the journey along the way that's most rewarding My truck doesn't leak, it just marks it's territory

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