If you're installing a 3.4 into an 87 or 88, here are the gaskets you'll need. Updated 03/14/2020 for flywheel information.
The oil pan gasket set is if you're using an 87 or 88 timing cover and 3.4 oil pan. Otherwise order OS 30512 C which is the listing for the 85 engine. The reason I recommend asking for the 85 pan gasket set is because some of the listings are incorrect due to 86 being a crossover year on some parts.
These are all FelPro gasket sets.
TCS 45828 Timing Cover Set Includes Water Pump Gasket.
MS 93045 Exhaust Manifold Gasket Set.
VS 50077 R Valve Cover Set--Cork Valve Cover Gaskets Also Come In The Intake Manifold Set, But Aren't Used On The Fiero.
MS 93020 Intake Manifold Set, Includes Lower, Intermediate, and Upper Gaskets.
OS 34501 R Oil Pan Set
BS 40626 Rear Main Bearing Seal. Always replace this seal when you have the opportunity.
Get a 91 Beretta GT 3.1 V6 at Advance Auto Parts if you don't have an 88 flywheel. The 88 Fiero and Beretta flywheels are identical.
Carquest Part # 50-6500 Casting # 14018712
LUK Part # I1000847944LUK
Sachs Part # I1000202427SAC
There is no need to purchase head gaskets unless you plan to remove the heads from the 3.4 engine. There's no real need to remove them unless you have them rebuilt.
So that you don't have to readjust the valves, before removing the lower intake on the engine, acquire a pushrod removal tool made by Lisle Tools. Part # 48500
http://www.lislecorp.com/di...roducts/?product=298If the 3.4 heads are left on the engine, you will need to remove the pipe plug in the rear of the passenger side head so that the Fiero temperature gauge sending unit can be installed. Remove the sender from the left front of the 3.4 head and use a good pipe compound when installing a pipe plug in it's place. You don't want it to leak after the engine's installed.
I also recommend installing a set of rebuilt injectors.
BMW Fuel Injector (M3) - The four pintle design atomizes fuel much more efficiently with a much better spray pattern. Use 0280150415 for flow reference. These are flow rated at 17 lb/hr at 43.5 psi stock Fiero fuel pressure. Or, you can have your stock Fiero injectors recalibrated for 17 # per hour, which is what's required for the 3.4
This information edited in on June 22, 2018This is what I found regarding Bosch Fuel Injectors # 0280150415. This comes from Injector Planet's website.
This is a modified pintle injector with a 4-hole nozzle. There is a pintle behind each nozzle hole. This creates a much better spray pattern for better atomization.
Bosch EV1 Fuel Injector
Jetronic port / 4 hole nozzle
Flow rates @ 43.5 psi / 3 bar
16.76 lb per hour (My Note: 17# rated injectors flow at approximately 16.666 lb/hr at 3 bar or 43.5 psi. See calculator chart below)
126.5 G per min. (N-Heptane)
176.1 cc per min
15.90 Ohm resistance
Regarding flow rates listed above, I've consulted 4 or 5 various charts for Bosch injectors and the EV1 injectors are rated by the various charts at anywhere from 14.1 lb/hr to 22 lb/hr. I strongly suggest you have them flow-tested if you purchase them. Bosch Part # 0280150415
BMW part # 13641730060
EDIT: Due to the problems some are having with the 0280150415 EV1 injectors, I am suggesting that you consider the 0280150941 Bosch injectors, instead. They have worked well for me for 50,000 miles, but the moment I upgraded to the EV1 injectors, I experienced all kinds of problems. About 3 of 10 have had problems with the EV1 injectors that couldn't be resolved. Any future reference in this article suggesting using the 0280150415 EV1 injectors is hereby retracted. I had time to do a little searching today and this is what I found for top feed Bosch injectors.
0280150415 injectors 16# = 16.76#/hr @ 3 bar (43.5 psi) compares on InjectorPlanet and InjectorRx websites.
0280150715 injectors 15# = 15.4#/hr @ 3 bar
0280150778 injectors 17# = 18.2#/hr @ 3 bar
The 0280150941 (Ford FOSE-B5A) injectors I switched back to are rated 14#/hr at 3 bar according to the InjectorRx chart and InjectorPlanet chart. They were recommended and provided by Fuel Injector Connection. That actual flow is 14.1#/hr
CHART FROM MOTOR MAN FUEL INJECTOR SUPPLY
Fuel Injector Size Calculator
Horsepower (at the flywheel) 160
Number of Injectors 6
B.S.F.C. *
Max Duty Cycle in % 80
Required Injector Static Flow Rate @ 43.5 psi lb/hr 16.666
cc/min
NEW Bosch "green tip" injector. The green tip indicates a 17 lb injector needed for the 3.4. This series injector has apparently been replaced by the above-recommended injector. I can't find them on their current website. You can get them from Fuel Injector Connection at
http://fuelinjectorconnection.com/shop/ These work well with the stock Fiero ECM.
I've tried the Mustang 302 injectors and the stock injectors that came in the 3.4 and had problems with both. Others might recommend Accel or other brands. I can't say they're good or bad since I have no experience with those.
You can use your original harmonic balancer but if you use the 3.4 balancers, you will need to have a machine shop cut new timing marks to match the position of the 2.8 balancer marks. If you use the 2.8 balancers to locate the mark on the new balancer, you must be certain that the 2.8 outer ring hasn't slipped. The timing mark is approximately 7 degrees counterclockwise of the keyway.
87 and 88 Fiero pans and timing covers can be used, but if your engine is either, use the 3.4 pan to provide clearance for the oil pump. All Fiero V6 pans will need to have the baffle notched for clearance and the 85 or 86 timing cover will need to be used with the 85 or 86 pans. If any modification is needed on the 3.4 pan, it's only a slight indentation down the front corner to clear the front motor mount. If done with a brass drift and hammer, you are unlikely to cause any breaks or cracks.
