Rebuilding the 4-tec

[Lurker]

For those of you who have rebuilt these engines, what tips and tricks can you offer? What should be done to make these motors more bullet proof? I have never worked on an engine with a counter balance shaft, so does that prevent me from working the crank any?

I'm still on the fence of rebuilding this myself or having the man Steve Friebe build me a killer motor.

[Insanediego Joe]

Let steve do it...... He built the spitfires motor. Ive done everything I could to blow it up and it still running great.

[Hydrotoys]

It does bring up a good point....

What does it take to rebuld a 4-tec correctly...

[friebe1]

I took the guts to a speed shop a year or 2 ago and they were able to balance the rods. IE= make them all the same weight.
They said the piston assemblies were perfect from the manufacturer.
They couldnt fiqure out the crank/balancer mathmatics?? so they were unable to do anything with them.

As far as what does it take to rebuild a 4 tec properly, I have learned a bunch of expensive lessons that I would be happy to share. But Long Beach to catalina is this weekend and I am on overload!!! I will chime in after the weekend.

Josh, if you can wait a couple weeks and you are willing to buy the parts and the pizza and the dancing girls and ..... WE CAN DO THIS.

Call me,
Steve

[Lurker]

Steve, thanks for the offer, I will definately take you up on this. I'm not in a very big hurry, figure I'm down the rest of this summer anywho. I'll start sourcing parts now since I know a bunch are on back order.

Good luck this weekend! We'll touch bases next week sometime.

[9secZO6]

I would like someone to give me the weight of the n/a piston, the stock piston/rod/ring combo is 1263 grams, give or take 1 gram....I checked, 8 of 'em, 1 was in bad shape w/ broken rod. If the replacement pistons weight is about the same I don't think the balance is an issue. If they are heavier, I think some mallory and balancing would be in order. Some hardcore specs on ring gap and crank thrust would be helpful, not just what I "think" they should be. Found another motor, this 1 has 40hrs and broken camchain......maybe the block is good and I will get 1 together next week-end.