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interfering or non-interfering engine??
Posted: January 8th, 2008, 4:51 am
by novaks
I called a mechanic the tow truck driver recommended to take the car in tomorrow morning and the mechanic suggested my timing belt broke. Basically I just lost power when driving, but unfortunately I didn't know that cranking the engine after break down might have cause valve damage.
So are these engine non-interfering or did I wreck my engine?
93 mx-3 1.8 v6 stock engine. Someone told me if my timing belt broke and I cranked the engine over, I would've known it was the timing belt on an interfering engine (I guess by the sound).
Cranking over sounded normal.
Thank you and please reply soon. I've never been to this mechanic so I don't want him to say my valves are gone if that's not the case
EDIT: Sorry...found my answer by searching and found my older post mentioning the RS and GS are non-interfering which is very good. So now if the mechanic tries to hit me up for valve repair i'll have someone else work on the car. ty
Re: interfering or non-interfering engine??
Posted: January 8th, 2008, 1:37 pm
by se7en
shoot, I just noticed your edit thing...
but ya, these engines are NOT interferance engines. You didn't hurt anything hurt anything valve wise I wouldn't think.
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Re: interfering or non-interfering engine??
Posted: January 8th, 2008, 1:43 pm
by Smith18
thats why i love these cars!

now if it was a Honda you'd be pissed right now!
Re: interfering or non-interfering engine??
Posted: January 9th, 2008, 12:22 am
by Mooneggs
non interference mazda motors FTW! I'm glad my klze didn't get screwed up when the timing belt snapped!
Re: interfering or non-interfering engine??
Posted: January 9th, 2008, 10:09 am
by Custommx3
Mooneggs wrote:non interference mazda motors FTW! I'm glad my klze didn't get screwed up when the timing belt snapped!
X2!
Re: interfering or non-interfering engine??
Posted: January 9th, 2008, 2:18 pm
by hgallegos915
They should have made all engines non interefence, stupid motor companies trying to get more money?
Re: interfering or non-interfering engine??
Posted: January 9th, 2008, 4:48 pm
by se7en
ya, probably. We are lucky that ours aren't Int-fit.
maybe that's why mazda stopped making the vulnerable mx-3?
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Re: interfering or non-interfering engine??
Posted: January 9th, 2008, 4:55 pm
by JM1EC-V6
All Mazda engines that have a 19mm oil drain bolt and Timing belt are ALL non-interference engines.
All you need is a towing and a belt in case of breakin' timing belt.
Re: interfering or non-interfering engine??
Posted: January 9th, 2008, 6:50 pm
by mr1in6billion
hgallegos915 wrote:They should have made all engines non interefence, stupid motor companies trying to get more money?
I don't know why they do it, but my guess is that by limiting the space above the piston at tdc you can raise the compression higher getting you more power out of a smaller displacement/engine. It's probably a carry over from diesel engines which feed on the higher compression.
Re: interfering or non-interfering engine??
Posted: January 9th, 2008, 7:13 pm
by 94mx3precidia
At first i thaught it was an interferrence engine. Seeing as how many belt suppliers at my work including DAYCO all say that the mx-3 is an interference engine. specifically the v6. Now that im getting older and wiser i realize all these stupid mistakes people are getting paid for and are publishing into corporational books.
Re: interfering or non-interfering engine??
Posted: January 9th, 2008, 7:32 pm
by SuperK
I would say the KL's are DEFINITELY interfering... to my sanity.
Other than that, I also had the belt break on me in the worst possible manner. I WOULD say that it didn't harm the engine, but it was a catalyst to EXTREMELY bad luck.
So if you break a belt, you're not risking valve damage, just EXTREMELY bad luck.