RX7Club.com - Mazda RX7 Forum - Easy ways to inject Seafoam/water into the rotors

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Easy ways to inject Seafoam/water into the rotors

I am aware that one can use the vacuum line from the break booster to have the rear rotor take the seafoam without removal of the spark plugs (confirmation?). My question is there any similiar ability for the front rotor, or is there a specific location I could spray deep creep into (IE the right side of the throttle body butterfly valves)?

I'm curious for this partly for two reasons. One I think there's some carbon build up in the front rotor and has caused the freezing of that particular PI and I am hoping that directly injecting seafoam into these locations will help in eating the carbon and throwing it out the exhaust. I can rotate the PI but it's rather difficult, but it gets easier the more I do it.

And two, the start up of the engine is a little rough, but evens out the more I let it run: runs a little rough for about 30 sec, then fine. I am hoping that the seafoam will cure that aliment as well.

I did search on input methods for the front rotor, but nothing on the forum about it from what I saw. Any ideas? I don't think there's directly any vacuum lines for the front rotor specifically. hmmmm.:Wconfused

Thanks 87-T66, serves me right for not checking there first.

Quote:

Originally Posted by RotoryRessurection.com

To perform this, I use a gallon jug of water and a long vacuum hose, say 3 feet. Though this is different for nearly every year and model, the underlying goal is to find 1 or 2 vacuum nipples on the intake manifolds after throttle body, preferably on the lower intake manifold so that the water can run straight down into the block. You want to feed both front and rear rotors evenly…generally you have 4 intake runners, 2 for the front, 2 for the back. Some engines have one nipple that can feed both (s4 turbos, for example, have one above the BAC valve that is evenly split between F and R primary runners). Some engines (fd’s and s5 na’s for example) have 2 separate nipples that can be teed together externally (vacuum hose and tee) to evenly feed both rotors.

Does anyone have a picture of these nipples for the different years?