87RX7TII

just took the car to the dealership (i know bad move) but I had to get it checked to see what was wrong after the rebuild.. so the guy tells me the front rotor isnt turning (the compression is fine but its not building any so its only working off of the rear rotor... So i find out there was a bolt missing from the lower intake manifold... so now i have to remove the engine (again) and pretty much start from scratch cause i cant get the bold in with the turbo on........
anybody else stunned enough to forget a bolt on one of there manifolds?
what im really wondering is since that bolt is missing is it enough to stop the front chamber from building ANY compression like he said.. I dont want to have to take the engine out a third time after i get it together AGAIN.

Slacker7

iTrader: (2)

Err.. I don't see how the compression is fine but it's not building. But er.. you don't have to remove the whole engine do you? just remove the turbo and your good to go.

Aaron Cake

iTrader: (1)

Uh, OK...

Unless the eccentric shaft is broken, the front rotor WILL turn.

If you forgot a nut on the lower intake, just remove the turbo and replace the nut. No reason to pull the engine.

You can pull the plugs and listen for compression on the front rotor, but if this is a NEW rebuild that has never been started, you probably won't have much. It takes time for an engine to break in and build compression.

Tried a push start?

MaxRX7

how is compression fine and the front rotor not turning?

not building any what, compression ?

put some oil or ATF in lower plug holes, starting fluild on UIM, fully charged battery and as a last resort push start. You are getting fuel and spark right and did not leave anything disconnected, it should start.

Bambam7

I HATE dealerships, especially those complete idiot mechanics that don't know jack about rotaries. I don't understand how they can't apply simple mechanical principals to rotaries... I'm amazed they can put their own freakin pants on without help.
You work at a Mazda dealership, learn something about the damn car. Not trying to generalize, but they are the majority.

Anyways, the manifold nut might introduce a small vacuum leak, it's possible.

So what's up with the car?? Can't get it started, what? Need more info.
If it's fresh rebuild, using old seals, it won't start without a push. Run it for at least 50 km's too once you have it started- I'd recommend 100 actually.
I've got 400km's on mine now and while it starts up fine on it's own now, it still needs a few cranks.

How can they tell you the comprssion is fine, but at the same time it's bad????
Garbage.

BTW- Try those flexhead ratcheting box wrenches from Can. Tire- they're AWESOME for getting at nuts like that.
I couldn't live with them.

87RX7TII

sorry guys i didnt make what he said clear.. he checked the motor.. it was working but it didnt have compression in the front chamber.. so he checked to see if the engine was still good (it was a new rebuild I just bought from them so it better have been.)
I have all new gaskets.. its just when i started the car, it was a little hard to start but it ran smooth. BUT it had a severe lack of power! I took it to the dealer and they said its all fucked up.... most things are little and stupid like the oil pressure gauge is showing too much pressure (he said its prob a pinched wire.)
im just wondering if the 1 bolt would do that much?

How i get the turbo off without taking the whole engine and stuff out... dont i need to take off the upper manifold to take the turbo off?

Bambam7

That bolt has nothing to do with the compression.

Well... how smooth were the seals in their grooves when you put the engine together?? Did you blast everything with carb cleaner or something before installation? How's the front housing/side plates?

How many miles are on the engine?? Run it for about 200-300km's, and see how much better it gets. If it gets no better, than you have some seal problems. No fix other than to take it apart and see where you went wrong.
SOmetimes rebuilds on used seals take a long time to build compression.