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Felpro 1250 Intake gaskets 

 

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 Post subject: Felpro 1250 Intake gaskets
Posted: Sat Apr 11, 2009 12:36 pm 
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Has anyone had a problem with the 1250 wicking oil from the valley through the bottom of the gasket then into the intake ports?
It's just that I am having oil in manifold issue even after PCV etc removed. I suspected either unsealed rocker studs - not the case, valve guides - not the case.
I installed new 1250 smeared with ThreeBond 1207B silicon on both sides, ran engine for 45 minutes & then removed the upper.
Then slid a borescope down each port and to my horror it appears there is oil weeping through the gasket in every port. Again no oil from valve guides or rocker studs.
The oil I am using is Penrite Sin10 ( 10w/70 Fully synthetic ) - could this be a factor?
Have read somewhere that felpro 1250s-3 is better.
Any recommendations?

Richie

 

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1993 ED F/mont 5.0L, Auto, Edelbrock RPM's, CompCam XE276HR, Crane Gold Race 1.7's, Edelbrock Performer, 75mm T/B, MAP, 42lb , GenIII coils, PH4000's , Twin 2.5", Thermos & underspeeds, 3.7 LSD, 2800 stall and MoTec M800, 372fwhp @ 5400rpm & 387 ft-lb @ 4400 rpm.

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 Post subject: Re: Felpro 1250 Intake gaskets
Posted: Sat Apr 11, 2009 5:24 pm 
Getting Side Ways
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Running the 1250s on mine with no drama.
Put the 1250s on my mates car with no reported dramas.
And will be putting them on the 220kw engine thats going into the missus car.

 

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 Post subject: Re: Felpro 1250 Intake gaskets
Posted: Sun Apr 12, 2009 4:07 pm 
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Sounds like the head face is not square to the intake. Very common with TFS stuff...which you don't have.
I've never had that problem with 1250's and I only put a little(very little) extra silicone around the backside of the gasket around the water ports.
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 Post subject: Re: Felpro 1250 Intake gaskets
Posted: Mon Apr 13, 2009 4:39 pm 
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I don't think Felpro recomends silicon, just a spot to hold in place maybe. Should hook to head gasket. Try it dry, torque in sequence, re-torque warmed up.
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 Post subject: Re: Felpro 1250 Intake gaskets
Posted: Mon Apr 13, 2009 7:44 pm 
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On assembly I torqued the lower to 18 ft/lb in 3 stages. Then retorqued to 20ft/lb for 3 hot/cold cycles. It got better each time but on inspection you can see a drop of oil in each runner ( I clean the runners past the intake ports each time. The oil drop seems to sit just below the intake gasket - this is the case for all 8 runners.
The following link is interesting -
http://www.capitalareacobraclub.com/ind ... pic=5095.0

Any other ideas

Richie.

 

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1993 ED F/mont 5.0L, Auto, Edelbrock RPM's, CompCam XE276HR, Crane Gold Race 1.7's, Edelbrock Performer, 75mm T/B, MAP, 42lb , GenIII coils, PH4000's , Twin 2.5", Thermos & underspeeds, 3.7 LSD, 2800 stall and MoTec M800, 372fwhp @ 5400rpm & 387 ft-lb @ 4400 rpm.

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 Post subject: Re: Felpro 1250 Intake gaskets
Posted: Tue Apr 14, 2009 4:27 pm 
Getting Side Ways
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richie wrote:
Any other ideas
Richie.



Machine the head/manifold face for an O-ring? Ala LS1/Sprintcar engines?

 

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To Come:
Long rod 306, TFS 11R 205cc heads, SHP camshaft, 1.72 R/R, ported TFS Box R, 400hp NX SHO kit...

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