'FULL REBUILD' true or false???

[racer]

Is it true that rebuild engine will never be ass good as factory build engine.I mean it will never be as perfect and exactly fitted,and will always have problems of some sort ?

 

[rdrkt]

Originally posted by racer
Is it true that rebuild engine will never be ass good as factory build engine.I mean it will never be as perfect and exactly fitted,and will always have problems of some sort ?

I would say false a rebuild done by someone that knows what they are doing and takes time to pay attention to detail will be MUCH better than the factory motor. The thing that wont make it last is the tuning. The factory cars go through all sorts of stress tests and are tuned VERY conservatively. When you start trying to wring another 50 or so wheel hp out of it you wont have the same margin of reliability.

 

[racer]

so that means that considering the skillz and profesionalizm of most of the shops around I ll most likely get a average rebuild that will be good for few tousend miles befor it starts leaking and smoking again and all that kinda crap.

 

[DSMJim]

Rebuilding the bottom end of a motor is very easy, there are so little parts that any of our vendors who have obviously built a few motors and offer a few different styles will be able to supply you with a bottom end that is better than factory.

If your having Joe Blow maching shop build your motor, chances are it will be ok. A good V8 maching shop can whip together a 4cyl bottom end no problem as long as you provide the clearances your looking for (piston to wall, crank, rod etc) or run on stock.

Then there is having the guy down the street how has built a few motors and says he can piece yours together is where you will run into problems.

Cylinder heads are a completly different story. It takes a lot more skill to assemble a head properly and even more skill to get additional power from a head vs. building a bottom end for strength.

 

[kpt4321]

I disagree. It has been proven time and time again that your average shop CAN'T successfully build a 4G63 to last. If you want one rebuilt, then send it to a good DSM Shop.

The quality of a rebuild is not set in stone, it can go from terrible to better than stock, depending on who does it, and how well they do.

....Kyle T.

 

[Coup D E'Tat]

I rebuilt my head on my 90 talon, put new valves, valve seals, ground new seats, and did porting on the intake side to remove the casting marks. And all I can say is you need to have alot of time, and have an idea of how things work....and you should be fine. Prior to this little rebuild I had done really nothing with cars, but I have been into them for ever, and I was willing to learn. I can tell you I have learned alot by doing this. If you enjoy working on your car, I would say do as much as you fell comfortable doing, and leave the rest for the machine shop. And to get back to the original topic....I think you can do as good as or better job when doing a rebuild, and I say this only because you can put in better parts, and remove some things that shouldnt be there from the factory (such as casting marks)....so overall you can get: Better parts, obtain better performance, and hopefully have a car that will run better, longer. Well good luck in what ever you do--dave

 

[NOSNUSE]

To put it in a nut shell a good rebuild where the clearences are checked correctly(can't stress this enough, CHECK THE CLEARNCES CORRECTLY WITH THE RIGHT TOOLS AND NOT JUST PLASTIGAUGE) and everything is installed better than clean you shouldn't have any problems, I have heard the same story years ago, but it stems from backyard mechanics of old not having the experience to or the resources that we have today to correctly rebuild an engine, not to mention the fact that back in the early years cars where build to last for along time not just to 100,000 miles or so.