Wednesday, April 7, 2010

Engine saga continues.....

So the junkyard demanded their engine back and all I was left with was a 3400 with a broken camshaft. Now most of the time when the cam breaks the engine runs so bad that the owner will stop driving the car, but on this engine the owner tried to diagnose the problem himself and kept running the engine. Now the number 2 cam journal is so worn out the block is junk. Clevite or some other company does make a .08" oversized cam bearing set for this problem, but unfortunately the block I have is only useful as a boat anchor. I now have a good crankshaft, good rods, upper and lower intake, oil pan and all the bolts. All I need is a good block, new camshaft and heads. The head department took the heads from my engine to rebuild for another head job so when the junkyard guy showed up to get his engine I didn't have enough parts to give him. I was going to give him the broken cam motor and keep the good motor but I got screwed. So I don't know what I'm going to do about the motor, get a 3400 block and heads (another junkyard motor will cost me around $200 to $400) or rebuild the 2.5 tech IV.

Thursday, April 1, 2010

Does anyone read this????

So....as I have said in previous posts, I work in a garage that does a lot of engine overhauls, and occasionally a junkyard install for customers with less money. After the tech in the next bay swapped a junkyard engine for the 3rd time, we now have an assortment of parts with which I could build a complete engine. I was planning on rebuilding the 2.5 liter four cyilinder that came in the Fiero. (My original plan was to build a small displacement V-8, but that project became way too expensive.) So I settled on rebuilding the 2.5 as a cost savings (because I didn't have to buy an engine to rebuild) and strapping on a turbo.
But now I have a complete 3.4 V-6 from oil pan to intake and most of the brackets. The 3.4 actually costs less to rebuild than the 2.5 and I can still use my turbo (I think). I might have to reroute the belt and move the alternator down to the side of the block to clear the hood. I have already figured out a idler pulley replacement for the power steering (Fiero's don't have power steering). The new to me engine didn't come with the A/C compressor, but hopefully my original one will bolt up. Biggest problem will be the computer, I believe that I could use the ECM from the four cylinder. I'm basing this on several things, first, I know that the ignition module will run the engine without the ECM connected (I've started these engines with the plug disconnected and was trying to figure out why the engine ran so sluggish). Second, if I connect all of the injectors to fire at the same time the OE ECM should be able to control the fuel. I also know that the TPS and the IAC are the same as the OE parts so the computer should have no problem with them. I was planning on running a prom emulator anyway, so I can reprogram the ECM to overcome any problems I may have. Granted I will loose the "sequential injection" that GM spent so much money developing, but so what? I'll have a 3.4 liter V6 that will spin to 6000 and live. Now I hope I actually can have the engine, the junkyard might want some of the stuff back and then I might not have enough parts left to build it.