Replacing valve stem seals on SOHC, Advice?

85 Coupe 5.0

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Dec 18, 2001

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#1

• Nov 12, 2005

• #1

I am going to replace the faulty valve stem seals on my '96 4.6 soon, and was wandering if anyone has ever done this before? The engine is in the car. My major concern is, do I have to remove the camshaft "ladder" caps to use the spring compressor? Looking at the head pics I took when i had my RH valve cover off, it doesn't look like the spring compressor will work with the caps in the way. I have access to the spring compressor and spring spacer. The ford factory manual doesn't say anything about removing the caps. Anyone else ever done this before?

 

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bdcardinal

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#2

• Nov 12, 2005

• #2

there is a writeup on www.crownvic.net you dont have to remove the cam towers if i remember right.

 

85 Coupe 5.0

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#3

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Thanks I'll take a look around over there.

 

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bdcardinal

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#4

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heres the direct link, its meant for crown vics, but its mostly the same.

http://www.crownvic.net/tech/valvestem.htm

 

85 Coupe 5.0

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#5

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Not a bad tech article. Looks like you do have to remove the camshaft caps, one at a time. Ughhhh, now the hard part of actually doing it.

 

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bdcardinal

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#6

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haha shouldve read that article more closely. just have a good torque wrench handy for those caps.

 

sgarlic

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#7

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It goes without saying (actually not since I'm going to say it,) that you won't need the fan clutch wrench set as stated in that article.

 

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bdcardinal

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#8

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is this an early production model 96? i know the 91-95 panther chassis and earlier t-birds have this problem, but not many NPI stangs. they revised the valve stem seals.

 

85 Coupe 5.0

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#9

• Nov 18, 2005

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bdcardinal said:

is this an early production model 96? i know the 91-95 panther chassis and earlier t-birds have this problem, but not many NPI stangs. they revised the valve stem seals.

Click to expand...

I believe my production date is Feb. or Mar. , but would have to look to be sure. I have also come to the same conclusion, don't see too many stangs with this problem, but it fits stem seals to the "T" as far as symptoms go.

I'm sure it's not rings. It only smokes when you let it sit and idle for around 2 mins or so and only smokes lightly untill you romp it once, then you get a decent cloud then it will clear out.

Doesn't smoke when cold, only will do it on a warm/hot engine.

Doesn't smoke when driving, only when you let it sit and idle. gets worse the longer it idles and will actually smoke idleing if you let it sit long enough.

Checked PCV system, not suckin up oil there.

almost has to be stem seals. going to change them Thanksgiving weekend, we'll see how it works out.