Changed gear oils and Seafoamed today

[Presta24]

Finally got around to changing the diff fluids today. Used a bottle pump and Mobile1 75w90 LS syn. Made quite a mess but got er dun. All except the front diff. The plugs are so rusted I cant even get the hex bit in them. Just gonna have my buddy drain and fill it when he does my trans flush. Runner has 109k on it. Rear pumpkin oil was a little milkshaky and pretty thick. Center diff was dirty but looked good. I would expect front to look similar to center (V8 awd). Word of advice....take it slowwww with the bottle pump. Builds a lot of psi with the thickness of the gear oil. I went at it like a 16 yr old on prom night at first, and blew the outtake hose off. Pump worked great once I geared it down a bit. Rear pumpkin took right at 3 qts, center diff took a little more than 1.5 qts. This is the pump I used, got mine at the local O'Reilys for $12....Mityvac MV7241 Fluid Transfer Pump | eBay Next I ran the seafoam through the intake. Smoked like crazy. Hopefully a little better mpgs, and a little better throttle response maybe.

 

[itgogitrev]

If you haven't done it yet, change your oil after you Seafoam. That stuff will really thin out oil, even if it's been put into the gastank or the intake manifold.

If you already did it, disregard the msg.

 

[Presta24]

how does it thin the oil out if I didn't run it through the crankcase? I ran it through a vac line on the intake.

 

[Presta24]

taken directly from sea-foams website.....

The most frequently asked question about using Sea Foam® is as follows: “After using Sea Foam® in my oil, fuel, or through the vacuum line (to clean carbon from the combustion chamber) do I need to change my oil?” The short answer is: No you don’t have to change your oil after using Sea Foam® in any application.

When using Sea Foam® in your fuel or through the vacuum line for carbon cleaning your oil does not need to be changed. Using Sea Foam® in your oil, at 1 ½ ounces per quart, is a safe way to clean a crankcase, free up rings or free up sticky lifters as you drive. Sea Foam® is not a chemical engine flush and therefore, it will not damage internal engine components or plug the oil pick up screen. Sea Foam® is a pure petroleum blend with no chemical additives and is safe for long term cleaning or short term pre-service cleaning.

Sea Foam® is a blend of highly refined additive oils and is compatible with all motor oils including synthetics. It is safe for all internal engine components and will not affect any seals, gaskets or o-rings. Sea Foam® cleans oil deposits and varnish in your crankcase by safely/slowly re liquefying the old oil residue so contaminants may flow and be filtered. The longer Sea Foam® is in your oil the cleaner your crankcase will become. When adding Sea Foam® to clean oil, for long term maintenance cleaning, you must check your oil periodically for color and clarity, when your oil looks dirty change it. Because you added cleaning oil (Sea Foam®) to your oil you may have to change oil before the expected service interval.

When adding Sea Foam® to dirty oil before an oil change, for best results use 1 ½ ounces per quart of oil at least 100 miles before oil is changed.

 

[itgogitrev]

Sorry about the delayed answer...

Seafoam can get past the piston rings, especially on an older vehicle. I've used Seafoam on a few cars and always do oil changes afterwards. Some of them are fine, some of them drain like water.

Can never be too careful!

 

[SUBTEGRAL]

I add Sea Foam 100 miles before every oil change to the tank, crankcase, and down the main vacuum line.

It smokes while I'm pouring it down the vacuum, but after I shut off the engine for the thirty minute "hot soak", it hardly smokes when I start it up again.

It must always be pretty clean in there ..

Oh, and I use GL-5 80w-90 in the differentials, not 75w-90.