Non Interference

Wino · Post by **Wino** » April 11th, 2006, 11:54 am

I just read in one of the forums that that mx-3 v6 is non interference engine?

Is that true? cause many people have told me different and the shop manual says nothing about it.

Are u sure? I thought it was i changed my belt , tensoine pulleys because i thought it was one!

Wino

mxmaz · Post by **mxmaz** » April 11th, 2006, 12:05 pm

Yes it is a non interferance engine.

Wino · Post by **Wino** » April 11th, 2006, 2:00 pm

Really anyonelse confrim this?

precidian · Post by **precidian** » April 11th, 2006, 2:03 pm

mxmaz wrote:Yes it is a non interferance engine.

x2

Post by **Custommx3** » April 11th, 2006, 2:10 pm

X3...

I had my GS's timing belt jumped 5 teeth on the back head.. 2 teeth on the front head.. and still would run if I gave it fuel (ran like crap), but it still ran.. Got me into a parking lot

JWMX3 · Post by **JWMX3** » April 11th, 2006, 3:34 pm

you are all wrong, its an interference motor

J/k !

x4 for non interference

Nd4SpdSe · Post by **Nd4SpdSe** » April 11th, 2006, 5:38 pm

x5...even my mechanic said so

Wino · Post by **Wino** » April 11th, 2006, 5:48 pm

I checked the mazda shop manual.
To confirm,
It says interfrence.

Bucking Bronco · Post by **Bucking Bronco** » April 11th, 2006, 9:16 pm

x6 Screw the manual, Lordco said its an interference to but there WRONG!

I dont trust everything I read but this I will

If you still dont belive, do a search.

babyblueMX3 · Post by **babyblueMX3** » April 12th, 2006, 9:15 am

Wino wrote:I checked the mazda shop manual.
To confirm,
It says interfrence.

a guy I know sent his timing wrong. ended with bent valves, and marks on his pistons, he used wiseco pistons though. but the height of the pistons isn't as high as the ze pistons.
thing is I always thought that it was a non interference engine, but I'm begining to think otherwise after seeing a couple of incidents.

Wino · Post by **Wino** » April 12th, 2006, 11:15 am

Yep it is an interferece engine.
So guys change your timing belts. If over 150,000Km
At work I see alot of bent valves on stuff cuz of snapped timing belts.
Sometimes u can get away with it if the belt snaps in the right spot. However, if u have ever been at the end of a phone when you tell someone there engine needs $2200 in repair and they let out a blood curling scream.....You'll now the importance of timing belt changes on interference engines.

precidian · Post by **precidian** » April 12th, 2006, 2:28 pm

Of all the documents I have read and even info from Yoda, the V-6 is a non-interference.

If you say it is an interferecnce engine, please provide the source where you get this information from.

precidian · Post by **precidian** » April 12th, 2006, 2:58 pm

mazdamx-3owners,Jeff Abrams, 2001 wrote:ALL Mazda engines are non-interference.
However, this does NOT include the Duratec and Yamaha engines that are used
in some of the Ford-Mazda vehicles.

mazdamx-3owners,Yoda aka Vaughn, 2004 wrote:]All the B, F and K series engines are non-interference engines otherwise
they would never would have been used in Ford products. This is the reason
for Nissan only having a couple non-interference engines.

Under normal circumstances there should be 0.080-0.100" clearance between
the top of a flat top piston when are TDC and face of the valve at full
extension in the unlikely event the this should happen in the same cylinder
at the same time.

kiwi_MX3 · Post by **kiwi_MX3** » April 13th, 2006, 6:39 am

the 12a 13b and 26b are well hell they don't have valves so
hmm are they interferance donks or not...

the "STOCK" K serise motors are non interferance motors
as i check my vavle lift vs total travel when building my motor
and have a easy 0.060 clearance on a stock lift.

RoundTop · Post by **RoundTop** » April 13th, 2006, 1:30 pm

The 12a, 13b and all other rotary engines can be considered non-interference as they travel in an oval pattern that can never exceed spec.

Technically they are neither as they do not have pistons.

Know your rotary

James "RoundTop" Magnan
1985 RX-7 (RIP)
1996 MX-3 GS