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a few questions so i can get smart


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Was the EA82 the last of the non-interference engines? And what makes it non-interference? Maybe it's a dumb question...... but that's been bugging me since I heard they were non-interference. How can I tell if a dist. is new? Mine's pretty dirty.... but i haven't even taken the cap off to check it on the inside, but once I do I'd like to know what I'm looking for. Is it okay to mix synthetic and non-synthetic oils? I added a little synthetic gear oil to my diff cuz it was a little low... I don't really see how it would be a problem but I wanna be sure. I'll ask some more questions later, I'm gonna go to bed now... lol.

Thanks to anybody who can answer my dumb questions.. lol

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Was the EA82 the last of the non-interference engines? And what makes it non-interference? Maybe it's a dumb question...... but that's been bugging me since I heard they were non-interference.

No, the Legacy EJ22, EJ18 (in some early Imprezas) and the ER27 (XT6 engine) are all non-interference engines (the SVX engine may also be non-interference, but I do not know for sure) - basically everything up to the EJ25 - it is non-interference because the valves and pistons do not, at any point in the combustion cycle, overlap - meaning if the piston was broght to its highest position, and either valve opened fully, they would not touch - so if you snap a timing belt, you do not damage anything

 

How can I tell if a dist. is new? Mine's pretty dirty.... but i haven't even taken the cap off to check it on the inside, but once I do I'd like to know what I'm looking for.

that is pretty hard to do - may I ask why are you trying to find out? - the cap and rotor are the only items that require regular replacement - a distribuitor does not normally wear out - reguardless of age, it should look clean on the inside

 

Is it okay to mix synthetic and non-synthetic oils? I added a little synthetic gear oil to my diff cuz it was a little low... I don't really see how it would be a problem but I wanna be sure.

I know it is OK to mix synthetic and non synthetic engine oils (you could not do that with early synthetics in the '70s, but newer oils are OK - in fact there is a Castrol SyntheticBlend Oil available that is natural/synthetic blend).

I do not know if gear oil is any different

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