351c eating oil ...Help - Page 3 - Vintage Mustang Forums
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post #31 of 51 (permalink) Old 02-14-2019, 10:38 PM Thread Starter
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yea gettin me pissed off mate , car runs dead smooth everything right .... just keep losing oil ....anyways going to pull the intake and change the gaskets next week

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Originally Posted by Grimbrand View Post
I suppose it's possible you could be ingesting oil from the intake valley if your intake seals are leaking, but more likely, you'd get a lot more air than oil that way. If that was happening, your engine would almost certainly be running rough.

Given that you have to disconnect all the PVC stuff to pull the manifold, it seems like that's a possible source of trouble, but again, if it's pulling tons of oil, you'd think you would have a big vacuum leak that way too.

If it's not dripping, then the oil's going somewhere. It can't just disappear. My bet's on the tailpipe, one way or another.
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post #32 of 51 (permalink) Old 02-15-2019, 08:50 AM Thread Starter
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any advise if i should use the felpro gaskets or the ones recommended by edlelbrock?

the intake im using on my 351c 2v is this...

https://www.summitracing.com/int/par...view/make/ford
gaskets recommended
https://www.summitracing.com/int/par...7265/overview/
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post #33 of 51 (permalink) Old 02-15-2019, 11:49 AM
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OK ,
You changed camshaft and the problem started after that. Did you check the valve stem seals to see IF they bottom out on the retainer with the new cam? if they do (or did) this could crush them and cause an oiling condition . I agree with others , the Fel Pro ( especially "printoseal" ) is a terrible gasket and I'n not sure the Edelbrock gasket isn't made by FelPro. as well.
Those are the two things "I" would check. Clevelands ARE notorious for wearing valve guides but it doesn't "instantly" happen.
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post #34 of 51 (permalink) Old 02-15-2019, 12:40 PM
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FYI, I did a cam change on my Cleveland last month. I have an Edelbrock performer 2V intake. I used the Edelbrock gaskets and installed them with Gasgacinch exactly as Edelbrock recommends. And I'm pretty sure I have a vacuum leak at the intake ports.

In my experience, whenever I have used any intake gaskets other than Felpro, I get vacuum leaks. I know many people say they've had problems with the Felpro gaskets, but since my experience is the direct opposite, I'm going to pop the intake and try the Felpro gaskets.

As a suggestion, be sure to torque the intake bolts in at least two phases. Torque them to about half the recommended spec, in order. Then torque them to full spec, in order. Wait a while for the gaskets to relax, then go over each bolt again, with your torque wrench still set to the correct spec, in order, to for good measure. Likely, most of the bolts will move just a little. Also, put a little oil on the threads of each intake bolt before you install it. This will help the bolt to reach actual torque.

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Last edited by Klutch; 02-15-2019 at 12:42 PM.
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post #35 of 51 (permalink) Old 02-16-2019, 07:13 AM Thread Starter
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Can you check if the valve stem seals are shot without pulling the valve covers / heads ??
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post #36 of 51 (permalink) Old 02-17-2019, 04:08 PM
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Quote:
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Can you check if the valve stem seals are shot without pulling the valve covers / heads ??

You have to remove the valve covers to see the seals.
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post #37 of 51 (permalink) Old 02-17-2019, 08:56 PM Thread Starter
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running a compression test to see if its the values or just that the piston rings are worn ...... if its the valves going ro replace the heads ...
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post #38 of 51 (permalink) Old 02-17-2019, 10:46 PM
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Are you running a mechanical fuel pump? Check that the pump seal isn't ruptured and putting raw gas into the crankcase. Change the oil. Does it smell "gassy" and lack viscosity?
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post #39 of 51 (permalink) Old 02-22-2019, 08:03 AM Thread Starter
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the compression looks alright , must be the valve seals leaking then .....anyone know a place to buy good iron heads ?
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post #40 of 51 (permalink) Old 02-22-2019, 09:03 AM
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Why replace the heads? Have yours rebuilt, or just replace the valve seals with them in place. A morning's worth of work and $20 in parts.

If you're going through the trouble to replace the heads, step up to an Aussie closed chamber head, or just go aluminum.

https://www.summitracing.com/parts/t...view/make/ford

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post #41 of 51 (permalink) Old 02-22-2019, 08:49 PM Thread Starter
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thought of going aluminium but want to keep the stock rockers and stuff to keep cost to a minimum.

ill need to change the springs/valves etc so decided to get a complete head.Also mechanics here in Qatar aint that great.

OEM iron heads 2V completely rebuilt
Bowl blend porting
Assembled with stainless valves
Valve springs for hyd flat tappet cams up to .550
Positive locking valve seals

This is what im planning to get for some street performance?


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Originally Posted by Hemikiller View Post
Why replace the heads? Have yours rebuilt, or just replace the valve seals with them in place. A morning's worth of work and $20 in parts.

If you're going through the trouble to replace the heads, step up to an Aussie closed chamber head, or just go aluminum.

https://www.summitracing.com/parts/t...view/make/ford
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post #42 of 51 (permalink) Old 02-22-2019, 09:47 PM Thread Starter
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checked on the fuel pump and it looks alright , thank you ... any advice on the heads mentioned in the above post mate ?

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Are you running a mechanical fuel pump? Check that the pump seal isn't ruptured and putting raw gas into the crankcase. Change the oil. Does it smell "gassy" and lack viscosity?
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post #43 of 51 (permalink) Old 02-22-2019, 11:25 PM
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Assuming your engine has USA 351C 2V heads they are "open chamber" style. The Aussie 302C 2V heads have "closed chambers". If you're going to spend all that money on iron heads you may as well spend it on better iron heads.
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post #44 of 51 (permalink) Old 02-23-2019, 05:34 AM Thread Starter
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Is there a good source I can buy them heads off ? Cause I need to get it shipped to Qatar.
So a trusted source ...

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Assuming your engine has USA 351C 2V heads they are "open chamber" style. The Aussie 302C 2V heads have "closed chambers". If you're going to spend all that money on iron heads you may as well spend it on better iron heads.
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post #45 of 51 (permalink) Old 05-23-2019, 11:25 PM Thread Starter
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still havent solved the disappearing oil.... car starts up and runs perfectly every-time.... should i just go pull the intake and change gaskets?
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