Hello everyone ,I am new to the fiero ! I am picking up a 1987 Pontiac fiero 2.8 automatic this weekend ,and I am going to do the 3.4 liter engine swap .the 2.8 has rod Knock.I just have a couple questions, some may have already been answered ,but rather then rummaging threw the fourm I figured I'd just ask . I know about the starter relocation kit .I am just curious if I also need to replace the flywheel /flexplate even though I am mateing it back to the stock automatic transmission . Do i need one off of an 88? or will the flywheel off the 3.4 or 2.8 work .the 3.4 is from a 94 -95 Camaro. Also what other modifications will I need to do. I am already aware of using the timing cover and oil pan from the 2.8 and as mentioned before the starter relocation Kit and reusing the lower intake and upper intake manifolds from the 2.8 as well as the exhaust manifolds 17lb injectors harmonic balancer , distributor, modifying the baffle in the oil pan to fit the new pickup. I've also seen that some people just bash in the corner of the fiero oil pan to clear the engine mount ... I would rather not do this I'm sure there is another way? I appreciate any and all information I can receive! Thanks in advance !
You will need a flex plate from an 88 or from a Beretta or Cavalier, Buick Skylark, Grand Am or other 88 and above 60 degree V6 engine. I think up through a '93 will work.
You can use the oil pan from the 3.4. I have it in my 87 GT. I don't think my installer had to dent the pan. I was thinking that was a requirement only on the 88. You won't have to notch the baffles with the 3.4 pan. Not sure about the timing cover, though the one from either engine will mate with either oil pan. My 3.4 didn't have the timing cover on it when I picked it up, so my 2.8 cover was used.
Some discounters like Rock Auto, Parts Geek, Parts Train or Parts Direct may still have new flex plates available.
You can use the 2.8 harmonic balancer or if you want to use the 3.4, match-cut the timing mark over to the 3.4
The 3.4L P/R swap is about the easiest swap that you can do. Your Fiero will run better and give a boost in performance but a chip reprogram is recommended to adjust to the larger flow rate of the 3.4L injectors.
------------------ " THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite. "THE COLUSSUS" 87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H " ON THE LOOSE WITHOUT THE JUICE "
okay so everything seems pretty straightforward then. the only thing I am now concerned with is computer tuning. this is something I was not aware of .this car won't necessarily be a daily driven car but I would like it to be reliable how much does it cost to get the computer reprogrammed.and where would I do that? I am talking the option that does not require me to completely replace the ECM and do a bunch of wiring
Also thank you all so much for the very quick responses I'm excited about this new project and have always wanted a fiero! It's even the year I was born!! This will also be my fifth Pontiac! I've owned .
[This message has been edited by Mr.sandman (edited 06-14-2019).]
I have other information in my thread on Georgia Fieros, including gasket set numbers and updated fuel injector information that doesn't require ECM reprogramming.
You will need a flex plate from an 88 or from a Beretta or Cavalier, Buick Skylark, Grand Am or other 88 and above 60 degree V6 engine. I think up through a '93 will work.
You can use the oil pan from the 3.4. I have it in my 87 GT. I don't think my installer had to dent the pan. I was thinking that was a requirement only on the 88. You won't have to notch the baffles with the 3.4 pan. Not sure about the timing cover, though the one from either engine will mate with either oil pan. My 3.4 didn't have the timing cover on it when I picked it up, so my 2.8 cover was used.
Some discounters like Rock Auto, Parts Geek, Parts Train or Parts Direct may still have new flex plates available.
You can use the 2.8 harmonic balancer or if you want to use the 3.4, match-cut the timing mark over to the 3.4
Fiero oil pan repros available new... I installed one on my Formula summer last year.
Hello everyone ,I am new to the fiero ! I am picking up a 1987 Pontiac fiero 2.8 automatic this weekend ,and I am going to do the 3.4 liter engine swap .the 2.8 has rod Knock.I just have a couple questions, some may have already been answered ,but rather then rummaging threw the fourm I figured I'd just ask . I know about the starter relocation kit .I am just curious if I also need to replace the flywheel /flexplate even though I am mateing it back to the stock automatic transmission . Do i need one off of an 88? or will the flywheel off the 3.4 or 2.8 work .the 3.4 is from a 94 -95 Camaro. Also what other modifications will I need to do. I am already aware of using the timing cover and oil pan from the 2.8 and as mentioned before the starter relocation Kit and reusing the lower intake and upper intake manifolds from the 2.8 as well as the exhaust manifolds 17lb injectors harmonic balancer , distributor, modifying the baffle in the oil pan to fit the new pickup. I've also seen that some people just bash in the corner of the fiero oil pan to clear the engine mount ... I would rather not do this I'm sure there is another way? I appreciate any and all information I can receive! Thanks in advance !
Not so sure how well the TH125 will stand up to the extra torque from a 3.4. It's not a stout transmission. Has anyone done this before?
Not so sure how well the TH125 will stand up to the extra torque from a 3.4. It's not a stout transmission. Has anyone done this before?
I've met a few owners running the 3.4L with the TH125 w/o issues. The step up in torque with a 3.4L P/R engine is 200ft lbs and only 30 ft lbs more than the 2.8L.
------------------ " THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite. "THE COLUSSUS" 87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H " ON THE LOOSE WITHOUT THE JUICE "
I have other information in my thread on Georgia Fieros, including gasket set numbers and updated fuel injector information that doesn't require ECM reprogramming.
You can see our information without registering. You must be registered if you want to post or access other hidden information only visible to registered users or paid members.
www.gafiero.org as you've already discovered. Then just click on Message Board to access our forum. If you want to register as a user, at the top left of the message board where it says "Welcome Guest. Login or Register" just click on "Register" and follow the directions. Please use the same username so others can relate to who you are, between forums. We will receive notification of your registration and will approve you shortly.
4 more bolts and the engine is out !just waiting on a second hand to help me lower the cradle. I wish I could post pictures, I have never seen so much sludge in an engine in my life literally one inch of crusty sludge in each of the heads.
while I was removing a lot of things I noticed there are already two timing notches on the harmonic balancer. Is this normal? Or does this mean there may already be an aftermarket engine in there?
if there is a way to post pictures on this site please let me know
If there is a way to post pictures on this site please let me know
if there is a way to post pictures on this site please let me know
If there is a way to post pictures on this site please let me know
Look at the bottom of the page and you will see a red/white/blue rectangle with PIP on it. Click on the image and follow the instructions to download photos. Note that there is a specified maximum file size so you may have to resize some photos.
I haven't seen an engine like that since back in th 60's when many used single weight oil made from Pennsylvania Crude.
I would use nothing from that engine other than the external bolt-ons. I think I would even replace the distributor. It couldn't have been receiving much oil with that crud. If you get a complete used long block, be sure to remove the pipe plug at the left rear (trunk side) of the head, near the coil and move it to the opposite corner of the engine where the Camaro-Firebird temperature sender is located. You don't want to get the engine installed and find you have nowhere to connect the harness for your temperature gauge.
If installing a used engine, to avoid the need to readjust your valves while replacing the lower intake or its gaskets, get a Lisle Tools pushrod removal tool # 48500. They are obsolete at the factory but can be found on Ebay and other outlets. https://picclick.com/Lisle-...In-161494520471.html You simply put it on the end of the rocker, lift and swing the rocker out of the way to lift out the pushrod. Reverse to install.
[This message has been edited by fierofool (edited 06-18-2019).]
You can see our information without registering. You must be registered if you want to post or access other hidden information only visible to registered users or paid members.
www.gafiero.org as you've already discovered. Then just click on Message Board to access our forum. If you want to register as a user, at the top left of the message board where it says "Welcome Guest. Login or Register" just click on "Register" and follow the directions. Please use the same username so others can relate to who you are, between forums. We will receive notification of your registration and will approve you shortly.
This is what I get - "Sorry Guest, you are banned from using this forum! This ban is not set to expire."
Have you ever been registered or tried to register under another username on the Georgia forum? I cant find a ban under your username or email address. I don't know your IP number or hostname so I can't look that up. You can email me direct with any information you want to keep private.
[This message has been edited by fierofool (edited 06-18-2019).]
Best keep it bolted to the head so it doesn't warp. It's a mild stainless. An experienced MIG or TIG welder can weld it. Wait untl it fully cools before removing it to transfer to your new heads.
The THM125C is a solid transmission. No issues running it with a 3.4. Be aware that it was designed for a speed limit of 55 MPH, so the engine RPMs are a bit high at, say, 75MPH (speed limit in some states). That having been said, it can run to 125 MPH, no problem.
If you are pulling the cradle, you may as well replace the third gear switch, the transmission control solenoid, the filter, and the seal.
I can't find the pic of the TCC or 3rd gear switch at the moment, but when you replace it, it would be a good idea to replace the connector, too. This is what the transmission harness plugs into on the outside of the transmission and the switch plugs into the back. I found that it's easiest to remove this connector, pull the TCC switch harness through the opening in the trans and plug the switch into the backside. After doing that with an old one, the old one leaked. These things are old and brittle so a new one should be in order anytime the TCC switch is replaced.
yeah i'm keeping every thing until its completely done .i was wondering... should i use the alternator from the Camaro i hear it has more amps and i can get an pigtail adapter from Rodney D .also my car is an 87 so i will need that modified ac bracket correct? and the brass fitting for oil sender ? i know about the starter jig ..i am about to order a S_load of stuff i'm trying to get my list together intake up and lower gaskets, timing cover gaskets, valve cover gaskets ,egr gasket ,all new engine and trans mounts ,tcc switch ,trans filter ,and gasket .
