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Old 01-04-2014, 03:54 PM   #1
TooOld
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2001 Zetec exhaust manifold

Trying to get a 2001 ZX3 put back together.

I've noticed on the exhaust manifold and studs, 2 spacers (Ford part # W703974-S300). These appear to be used / needed to get the exhaust manifold ports precisely aligned with the cylinder head exhaust ports as the exhaust manifold stud holes have quite a bit of play while sitting on the studs. The spacers are basically plastic sleeves which tightly slip onto 2 exhaust studs.

Does this sound right to anyone?

Are those spacers really needed? Obviously I can install the exhaust manifold with gasket on the studs without those spacers, but what happens if I don't use those spacers? I'm assuming the exhaust ports on the cyl head won't align with the exhaust ports on the manifold.


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Old 08-22-2014, 11:46 PM   #2
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Did you ever get an answer to this question? I too wonder about those sleeves. I just did a header swap and between the four only one was savable. Part number?
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Old 08-23-2014, 09:57 AM   #3
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Quote:
Originally Posted by scottychop View Post
Did you ever get an answer to this question? I too wonder about those sleeves. I just did a header swap and between the four only one was savable. Part number?
Never did get an answer. I believe those same sleeves / spacers / aligners are used on some of the Ford Ranger engines too.
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Old 08-24-2014, 09:04 AM   #4
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Yes, without those sleeves you could possibly have the exhaust ports out of alignment. If you do not have the sleeves you should try and pull up on the manifold and center it and tighten it. It is not 100% necessary but the exhaust ports are cut to make use of exhaust gas reversion. That is the semi circle notch you see cut into the top of the exhaust port opening.

Yes, it will run without it being lined up! However I have found that at the very least, it would be better to pull up on the manifold to the top vs leaving it at the bottom of the ports.
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Old 08-24-2014, 11:37 PM   #5
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I'd never heard of them. I don't recall seeing any on my car ... But it was about 12 years ago I installed my header, could have easily overlooked them.

But the Ford header instal manual list them, so I guess they were there at one time.
http://www.fordracingparts.com/downl...-9430-ZX3C.pdf
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Old 08-30-2014, 11:49 AM   #6
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They are freaking plastic, what do you think plastic does at 800+ degrees? ?!*&$ Ford and their retard ideas. The black mud on the studs is what is left of them.

Take ANYTHING, say brake line tubing in a short piece or anything else that works, vacuum line, fuel hose, etc. Make it short so if it catches fire it is trapped in the hole and/or does not interfere with normal bolting down, use one on each end of the manifold. Bolt down manifold at two inner locations and you can even remove the spacers then. Made mine out of cheap copper tubing. All you are doing is making exhaust stud bigger to better center the pattern up, only need to do it on each end. Heck, in some manuals Ford is retarded enough to mention using only one, completely ignoring the manifold weight that then drops the other end too low, real smart, them guys...............

You can leave spacers in or take them out after the tighten, last time I checked the engines hadn't gotten smart enough to tell yet.

They make the holes too big to quickly index the manifold onto engine faster on assembly line, smaller holes harder to hit all the holes. I'm sure some sort of sexual innuendo could be applied there but I'm not touching that.
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