Georgia Fiero Club Forum
All Things Fiero => The Market => Topic started by: Sandman87 on July 24, 2019, 06:49:17 pm
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Hello all my name is Mike, I am new to the forum and happy to be here and to finally have a Fiero of my own! I've wanted one since I was a kid and have owned many Pontiac's! Charles Sewell pointed me here because I am looking for a part and I hear there is a barn full of them! I need the exhaust manifold on the fire wall side as mine is cracked. I am doing a 3.4 swap and Charles has been extremely helpful! I know there are after market ones but they are way out of my budget unfortunately. So, I just need an O.E.M replacement, used preferably, to keep cost down as my car had a blown engine and has already cost me a lot. I had to buy a used 3.4 engine and several swap parts gaskets etc..and the interior and paint is a mess and will require considerable reconditioning as well. If anyone is selling that manifold, I live in the Cincinnati area and would need it to be shipped to me. I can pay shipping if need be. Any and all help would be greatly appreciated!
Thanks in advance ,
Mike
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If you can remove the manifold I would recommend having the crack welded
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Agreed. That is inexpensive, and you can find your manifold. You should probably weld both manifolds, and remove the restrictions, while you're at it.
Hmmm. I have 2 sets of manifolds. I wonder where they are?
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If you decide to have your manifold welded, bolt it to a flat surface (a flat hardwood board will do) to prevent warping caused by the heat of welding.
Otherwise, I will look in the barn tomorrow evening.
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i thought about welding it I am just worried it will crack again . i don't want to have to remove it again . and the engine that blew was really bad i'm worried the heads were warped and could of compromised the integrity of the steel of the manifolds.
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I cannot address the part about the integrity of the manifolds, but the manifold will have to be run through a machine to make the mating surface flat again.
Whatever manifold you get, it should be welded, if it has not been. The manifolds were poorly built, and cracking is common. A good weld job will not be a problem.
The 3.4 requires more air than the 2.8. The intake and exhaust should be opened up to allow additional air flow.
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As a fabricator, I can say that the metallurgy of the manifolds is fine. They will not have to milled agter welding. The flamge is thin enough that the bolts will pull it tight. If you are concerned about the flatnees get a belt for a belt . Cut the belt and attach it to a board to make a long sanding block. Run the manifold back and forth to flatten it out. Yes, it will probably crack again as it is a compromised design. Opening the decklid will allow cold water to run down on a hot manifold causing it to crack. Nature of the beast
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Ill take it in today and re-weld all the seams i hope it holds up .
I have a plainer at work to flatten the surfaces .
If anyone has one id still like to acquire one just in case .
Im assuming its a mild steel correct ? I need to use the right welding rods .
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thank you for all your replies .
scott ,maybe i should fabricate some shielding to prevent this in the future ;)
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You should also weld where each of the ports connect to the logs. You can then open up the inside with a hole saw, and clean that up with a dremel.
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im going to weld every thing wish m luck its bretty bad
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Yeah, it is. Welding is not my thing, but try to keep the inside smooth.
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Several things can cause the manifold to break. Rain, as Scott said, along with the lack of supporting springs on the lower exhaust system. I've never seen a manifold break that severely.
The manifolds are mild stainless steel so let your welder know that. it will make a difference in the quality of his weld. If the old engine was blown, I would remove one of the heads and use it as my flat plane. Bolt the manifold back in place with all cracks closed as much as possible. The head warps on it's surface where it contacts the block. There's a little wiggle room for the manifolds to fit onto their studs and if there was enough head warpage to affect the manifold you would see a gap between the head and block, or if it warped sideways, it would break head bolts because they are a tight fit through the head as they pass into the block.
On a side note, before you install your 3.4, you should remove the pipe plug that's in the trunk side head just above the #5 exhaust port if you haven't already done so. Then remove the sensor that's in the opposite head, just above the #2 exhaust port. Put the pipe plug in place of the sensor and install a new gauge sending unit in the trunk side head. You can use your old 2.8 set up as a guide.
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Ummmmm I think that is a bit more than just cracked......It looks to me that it would have to be bolted in place to be tacked up then removed and welded. I do agree that it will have to bolted to an old head and left to cool before unbolting. I also recommend an Argon purge to keep the inside clean
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yeah i swapped that plug already thanks
yeah i think is going to be safer to just replace it .. thank you topnotch for taking a look i hope you have one . again its the front header besides the fire wall.
the engine is the worst ive ever seen i bet the heads were warped there was .5 inch of sludge in the oil gallery above the cam and both heads were full of sludge and carbon deposits it also spun main and #3 & # 5 barrings when i bought it he said it over heats and is knocking so...


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Mmmmmmmmm Caker Paste....... it does an engine good
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I only found back side manifolds in the barn.
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Darn, well thank you for looking !
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I think I can locate one for you.
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ScottB..are the manifolds good on the car you are stripping?
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Dont know yet
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ready for assembly!!
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Sandman, how quickly do you need the manifold?
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Well I was hoping to have it running by my birthday weekend which is August 1st. I took off Thursday and Friday of this coming week to try and knock it out and have it running by Sunday. But I want it done right, so it is what it is if I am not finished by then.
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Also I was able to get the pipe plug out of my old engine but I am not able to get it out of my new engine am I able to put that sensor in the other heads open port and just extend the wires so it will reach there where that temperature sensor or whatever it is?
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Yes, just pull the 3.4 temp sensor out and install the Fiero sensor in its place. You may be able to trace the wires back through the harness enough to pull them out and shorten the distance you have to reroute. I don't know how they're wrapped.
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Just a thought, but be sure to soak any bolts in PB Blaster or some such, to avoid unpleasantries.
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If you still need one of those front manifolds, I found one in my garage (while looking for something else, of course).
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He does, Pat. The one I sent got to Lexington Ky. and disappeared. I sent it by OOPS.
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He does, Pat. The one I sent got to Lexington Ky. and disappeared. I sent it by OOPS.
Aren't UPS packages automatically insured up to $100? Most of what I ship needs way more insurance that I have to pay extra for.
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They are, but it doesn't help my buyer and if I file a claim against it, it means that even if found, it won't b returned and that valuable piece is lost forever.
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The manifolds were more than $200 for a set, anyway. I think my recall kit was about $700, with manifolds. The one without was $250.
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UPS (pronounced OOPS) contacted me and wanted very detailed descriptions and photos of the item. In the event they can't find it, they wanted a price from a merchant that sells or manufactures the item. I had explained that it was more than 25 years out of production and came from a car that was 34 years old. So, I contacted a well-known Fiero used parts seller. I explained the situation including how much my claim was for and asked if he would give me a quote on the manifold. I asked if he would send it in an email because I had to provide proof from a seller as to the value.
He refused. Said he would give a price over the phone but he wouldn't help me to make a profit by claiming the manifold was worth more than what I sold it for. Wish that place was still under the old ownership.
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Somewhere I have a set or several of which i could take pictures, but that won't help you.
I dislike shipping things, because they get lost. It is incredible, that a company that only transports items, loses so many of them.
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This might:
https://westcoastfiero.com/products/28-exhaust-manifold-pair
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He refused. Said he would give a price over the phone but he wouldn't help me to make a profit by claiming the manifold was worth more than what I sold it for. Wish that place was still under the old ownership.
That is just an asinine view the vendor is taking. If you have to replace the lost manifold obviously your insurance claim would be the cost from a vendor to replace it. That seems legitimate to me.
I guess he can make a profit but you are not allowed?
I would wager a guess that Fierofool has given away thousands of dollars worth of parts over the years to help the Fiero community.
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Yep.
If it's the vendor I think it is, that particular vendor charges a fortune for everything. There is no profit to be made by getting an insurance claim for a fraction of the value. If someone sends you the Mona Lisa, and the painting is lost in shipping, it would seem that they should be able to get info to make a claim, and filing a claim is not making a profit, even if they were giving you the painting for free.
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I would wager a guess that Fierofool has given away thousands of dollars worth of parts over the years to help the Fiero community.
Thank you, Mike, but probably not that much.
I never thought about filing the claim for what it would cost to replace them, but the limit of insurance was set at $100. I think I'll send the OOPS manager the link that you provided, GTRS. Thanks.
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Top notch ,I still need one !
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Top notch ,I still need one !
PM sent.
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Hoping to get working on the fiero again this week !