1st time engine builder and the shit locked up. What did I do wrong?
 

I rebuilt my engine for the 1st time a 13b engine and while I roadtesting the car, the engine locked on me; not the transmission ,so what could be my mistake :banghead:

You won't know until you pull it apart.

will find out tomorrow after work

True story

Sorry to hear about the engine/more downtime on the car
It could be anything but I would guess oil related (pickup fell off or losing oil out between the front cover and front iron)
post some pics when you tear it down.

& make sure you try to rotate it after each step to hone in on the problem

I have built hundreds of engines since the very early 1990's and never had one seize or lock up, have seen ones that have though and all have been oil system failure related.

Oil pick up
No engine oil (oil line leaks, broken sump)
Oil pump drive failure (small key not installed ! or aligned properly)

Check the pick up when you take the sump off, check the oil pump drive, check the thermal pellet in the front of the E shaft, check the oil galleries in the E shaft (as I saw one that was blocked! and caused a front rotor to not get any oil and seize hard on the shaft. Look at everything in the oil system (look for oil in sump lol) and you will find the cause of why it "locked up".

lack of oil supply (flow and pressure) will be the only statistically most probable thing that will lock up a rotary, that and snapping the E shaft in half lol.

Edit - I missed the while rd testing part... I thought it was assembled and rotated.

The used locked up engine that I bought was built using a hodgepodge setup of S5 and S6 front cover pieces that didn't mix well and seized the front stat bearing to the e-shaft.

Make sure you take pics so we can determine the cause, or bicker about it like keyboard mechanics

:icon_tup: :lol:

What did I do wrong?
 

Here's some pics of what I found out so far

Could be a number of things.........

First of all, did you prime the oil system before starting the car?
Second, are you sure all the front bearing parts were from the correct series?
Third, some shit left over in the oilsystem that got pushed out when there was oil pressure and fragged the bearing

I think that I will go w/the 1st answer, 'cause I know for fact that I did not prime the oil system.
Thanks

In one picture the oil sprayer for the front rotor looks like it is wound out??? if this is so it will cause low oil pressure (could be the root cause).

It is hard to guess over the internet:

But next time:
* Ensure those sprayers are loctited in and tightened hard.
* Crank is 100% clean (oil ways).
* Lube all parts with petroleum jelly (Vasoline) lightly.
* Crank motor till you have oil pressure before starting it.
* Check function of thermal bypass in front of crank and make sure its installed correctly to.

Short of any foreign material or grossly out of spec bearing parts aside from other things I mentioned in my first reply you wont *touch wood* have anything of this sort happen again.

Good Luck with it all :)

This is all good to know since im gonna be rebuilding mine soon. im also a building newb.

Thanks all you guys for your comments and I hope on my next one it wont be the same.