[urq] Is the wx an interference engine?

[Louis-Alain Richard]

-----Message d'origine-----

I read around and had mixed results. Is the wx engine an interference
engine?

>>Yes. I have some pistons here to prove it... 


The other day i moved my car (intense cold the night before) it fired right
up and i turned off the ignition.
A few days later i come back and try to crank it nothing, no fuel pump, etc.
So i start to wonder look at the wiring since i put a mac10 in there.
Nothings wrong go to the hall, not at tdc! Look at the cam not there either.
Now i got kinda scared. The belt was loose and there was some scrunched up
squirrel nuts no joke! , i knew it was loose tho and was planning on
changing it to the newer longer style and adding a belt tension pulley. Same
reason i dint put to cover back on and nuts managed to find their way in the
bottom cover. Anyways it turned like 1/3 or is it 4/3? a crank turn from the
cams tdc. 

>> How far was the belt from its normal position ? A few teeth ? 

Now i put the cam at tdc and was able to do a whole crank turn by rolling
the crank by hand with no belt on. Note it was really cold so less
compression and i did it slowly. 

>> it just means that all cylinders had an open valve/spark plug. 

Anyways that told me that there's no broken valves but none were interfering
either at that point. So put back the belt on and tightened it. Did a few
engine turns with a 19mm to make sure i dint miss any sheared belt teeth
then started it up till warm. Then did a compressions check. Not very
high... ~120  cyl #2 is at 110psi Are these numbers normal for a high
mileage engine? I think new its supposed to be at 130psi ?  

>> From IST : Acceptable is 7-9 bar (102-131 psi). Minimum is 5 bar (73
psi). Max difference between high and low is 2 bar (29 psi). 

So i am a lil worried atm that i have slightly bent valves. 

>> I'm guessing the valves are OK. 

If they are interference how  much oil in cyl do i need to put to test the
valves? 

>> Oil is for testing rings, not valves. 

Thanx

Let us know, but I guess that engine is still OK.


Louis-Alain