blew my engine
 

Well sadly my engine blew today. i just purchased the car a week ago and it gave up on me. the guy i bought it from daily drove it and it seem fine. i test drove it and it seemed fine. so today i was warming up my car to take my friend out for a drive. it warmed up to 180ish and the fans turned on. i reved it up and around 7k the engine blew and died. antifreeze was gushing out of the engine. i jacked it up and found the problem. the center intake housing cracked. the crack is right below the spark plugs. its a hairline crack that goes horizontally and is about 3 inches long.

i was shocked at how that happened and that it wasnt the apex seal that died. i havent pulled it out yet. im hoping that the housing just cracked on the outside.

has this happened to anyone? do i have to rebuild the whole engine or do i just buy a center intake housing.

sorry i meant rear rotor housing lol

Post a picture of the damage.

Plates being cracked can be caused by binding of apex seal fragments, rotors, plates & housings trying to occupy the same space at the same time, while not meshing (something was out of place.

I've seen a rotor housing break out a 2" chunk in the load zone.

It sounds like you may have rolled an apex seal & it got smashed so hard into the housing that the housing cracked to reliev the pressure.

How many miles were on the engine? If it isn't locked up do a compression test before you pull it, then you'll know for sure if it's fuber with a 0 - 0 - x psi reading. What was the compression on the engine the last time you tested it?

Sorry it happened, I've been through it myself recently :)

I'll take a picture of it tomorrow. It supposedly had 30k on the motor. It has 3mm apex seals and it was a new shortblock. The engine is locked up now. The compression test were normal. Above 7psi on both rotors

take it to ben /karack, hes the best :) hes over by the orleans

What's the shop called

^ Rotary Evolution

so my car is all prepped up for me to pull the engine tomorrow. unfortunately the engine is seized so i have to pull the tranny out with it.

i should have a picture of the crack tomorrow, sorry for the delay.

im gonna have ben check it out, hopefully its not bad

I'm just going to leave this here... $750 if you come get it.



https://www.rx7club.com/3rd-generation-rx-7-1993-2002-parts-99/koyo-n-flo-steel-motor-mounts-ppf-subframe-3x-fd-trannys-rew-going-ls2-sale-957388/

talk to J.T.P here since you are in Vegas.
he's got a shop in Long Beach and does Formula D.

thats kind of a far drive for me

If I am reading understanding correctly.. from what you wrote in the 1st post... and that you say the motor is now seized..

Sounds like you had a catastrophic engine failure.. where the rotor internally comes off the stationary gear and crashed into the rotor housing.. breaking/cracking the rotor housing..

I have seen an engine that this happend to before. I broke it down (was not easy to do.. had to beat it apart with a serious hammer) all of the internals were destroyed..

The shortblock was all trash..


You where free reving the engine to 7000 rpm?

Why?

i think your right, the side is completely cracked. i was reving it up to burn carbon buildup. i got up to 7k and then boom

so its a lot worse than i thought

this was the crack i was talking about first

but i was way off

wow! ...that sucks! id say you would have been better off with a little carbon build up... more than a rebuild you have there.

you can see the rotor through the crack! thats crazy.

needs a rotor and a housing for sure ..but may have damaged the adjacent housings and even the crankshaft

yeah its pretty bad, i think i have get a new block

wow thats screwed

Can't imagine why anyone would do this. It betrays a serious lack of mechanical sympathy.

I guess it is the sort of thing that would seem cool in a video game.

dude, that blows

arent you supposed to redline it once a week for carbon buildup??