evansaero

Hoping to get some cleaning done today. I did a search and not one 996 guy has posted about it. The 993,944 and others are all doing it. Some have seen some good improvements.

Has anyboby used this Seafoam in the oil. How long should I run with it in the oil. Some say 500 miles before oil change. There are no direction on the can, and I don't want to buy a new engine.

Also I want to clean by way of direct manifold vacuum line that will feed ALL CYLINDERS or other possible source ie. brake booster line. Does anyone have pictures of which line I should use.

Any advise would be helpfull

99firehawk

why ?

evansaero

Why not?

993,994,964,924 guys are doing it why not us

99firehawk

just never seen a m96 motor with sludge ( excecpt an intermix car or 7 ) or any other debris,
Lil techron to clean the valves every 5-6 tanks and your good to go

evansaero

Thanks for the reply. I'll hold off

1999Porsche911

Aaron, I pm'd you for the location of the line to use.

evansaero

Thanks

JasonAndreas

I've tried seafoam and several other similar products on a 964 horizontally-opposed 3.6L and I checked my intake & exhaust valves and pistons and there was no visible difference to any component in the engine. The only cool thing about seafoam was the F1 worthy smoke show. Otherwise it was a total waste of money.

ErnestTX

I have used bunches of Seafoam in a variety of engines as a fuel additiive. Good product, cleans up carbon deposits, and makes them run smoother. I have never dumped any in the 996 though. YMMV.

evansaero

Just did the cleaning through the vacuum line.

I let it sit for 7-8 min and used about 1/2 the can. The car just sucked it right up.

Not that much smoke, I have video I'll post later. I guess it's because I rev the **** out of her every day.

There is 1 improvement that I saw.

1. Engine running just a little smother. Back fat jiggle and RPM's confirm this.
I have used Techron and never saw this kind of improvement


I'll have to see if fuel mileage improves after I finish the full tank of gas I have.

In the end I’m happy with the initial results

JasonAndreas

Any fluid left to sit in a horizontally opposed engine will most likely leak right out an open exhaust valve. It might work on a V-style cylinder head/piston but not here.

1999Porsche911

You should let the tranny fluid sit overnight for best results. It vaporizes in the intake and will sit and soften any carbon on componants it gets to. The longer your car smokes the next day, the more crap it has cleaned.

Tippy

Oh God, someone is going to hydraulic lock there motors over some carbon build up.

I admit, I have used tranny fluid and good ol' water while revving the snot out of the motor once the engine was really hot, I only noticed a difference around the intake side of the combustion chambers and the middles of the pistons once I tore my engine down, it didnt get everything. This was not a Porsche motor though.

evansaero

No worries, no hydraulic lock going on here.

So if you did it with other motors whats the big deal? Because it says PORSCHE???

Ya, maybe only some build-up but it does run better. I forgot to mention that my idle oil pressure went down 1-2 ticks. From 1.8 to 1.6 Not really sure why that is???

All in all like I said before, the car runs better

evansaero

I have video

Seafoam

One thing I noticed is that the right tail pipe did not spit out much smoke.