Sea Foam Insertion Point

[spindlecone]

The large hose, the upper one with a clip is a water line , leave the SOHC cover off so you can work the throttle.
I made the fitting,can make you one for a couple bucks no problem if you want one
Edit: my 03 may be diff than yours, look at the pic I posted before my lttle mod

 

[ions]

they don't really look much different they both have the big and smaller tube in the same spot.

 

[techieman33]

So, i still haven't heard anything for putting it into the ohv, and pics would be great, thanks.

 

[gss]

I am not familiar w/ your engine, but the larger hose looks like it has the PCV on it, so that is as good as it gets. I put a whole can in and let it sit for 25-30 minutes. You can wait longer if you have time, it will just soak the stuff better.
I did my DPFE the other day and I could not believe all the whiteish gray crud built up in the holes, especially the samall one. Must have been time for a change.

 

[Billy177]

i would let it sit longer but i am afraid that it would damage the plastic intake manifold

 

[Lee S.]

Okay, I decided to try out seafoam for the first time today mainly because I could never find it around me before and Autozone apparently just started carrying it. I read thru this thread and about 20 others and since I'm a seafoam newbie and I'm vacuum system challenged...l'll be dammed if I could not find a good spot to get it into the intake of my 98 SOHC. I wound up using the Brake booster line.

I did not have a vacuum line under the throttle body. At least one that was easy to get to and use. There is what appears to be a vacuum line "T" type fitting running down the front and around the sides on top of the engine but this was buried pretty far down under the water hose and sort of behind the the thermostat housing. It really didn't look all that accessible and if it was the correct vacuum line that others have referred to I certainly didn't know what side of the 'T' fitting to disconnect and use for the seafoam.

MY PCV valve is located in another 'T' type hose fitting at the rear of the intake. I guess I could have tried the seafoam there except I also did not know what side of the 'T' to use.

I was runnig out of daylight so I didn't get a chance to hunt down the vacuum line to the IAC that Billy177 mentions. This why I opted for the brake booster and it sucked the seafoam right in.

Is it me? Am I really challenged or is my 98 SOHC just different? I know it's different that the OHV and 5.0 but maybe it's also different than other years SOHC...mine didn't look like the pics earlier in this thread.

Can anyone enlighten me on this?

I have another can of seafoam and may try again next weekend.

Lee

 

[aldive]

Is it me? Am I really challenged or is my 98 SOHC just different? I know it's different that the OHV and 5.0 but maybe it's also different than other years SOHC...mine didn't look like the pics earlier in this thread.

Can anyone enlighten me on this?

What didn't look like what pictures?

 

[Billy177]

for future reference that is the iac hose. it is in my opnion the best way to use seafoam. just rember to unplug the maf first or it will not start with the hose unplugged

 

[Rhett]

for future reference that is the iac hose. it is in my opnion the best way to use seafoam.

... in a SOHC engine.

For everyone's reference, OHV's don't have that hose. Just thought I'd mention that so OHV people are not confused in the future.

 

[aldive]

for future reference that is the iac hose. it is in my opnion the best way to use seafoam. just rember to unplug the maf first or it will not start with the hose unplugged

I am confused. The hose that you have marked in red, the one you are calling the IAC hose, I thought was one of the crankcase ventilation tubes.

Thanks ....

 

[Jefe]

I am confused. The hose that you have marked in red, the one you are calling the IAC hose, I thought was one of the crankcase ventilation tubes.

Thanks ....

Yeah, I'm not familiar with the SOHC engine, but on the OHV that is the cranckcase vent. That (the crankcase vent) would be a bad place to put seafoam in

EDIT: now that I look closer it apears the crankcase vent is just to the right of the hose that is pointed out.

 

[Billy177]

yea the iac hose is hard plastic and the crankcase is a rubber hose

 

[Rhett]

On the OHVs they just have the crankcase vent tube there, which won't be too helpful with Sea foam. There's no iac tube at all. But it's ok, there are plenty of other places to put in SF on an OHV...

 

[Lee S.]

What didn't look like what pictures?

I was referring to Spindlecone's Pic's with the barbed connector he installed. Maybe I just didn't look hard enough. He did mention that it was hard to get to the PCV line. I'll take another look and try to post some pics if it ever stops snowing around here.

 

[Lee S.]

yea the iac hose is hard plastic and the crankcase is a rubber hose

Thanks for the pic and the replies Billy. I seem to recall when I installed my Mac intake that the hose you are referring to is metal but it maybe hard plastic...I'll take another look when it stops snowing. It would appear that this would be the best place for seafoam in the SOHC...I'll make sure I disconnect the MAF and give it another try this weekend. Do you just suck in the seafoam or pour it in with a funnell thru the IAC hose?

Lee

 

[techieman33]

I've asked before, but can someone post a pic where to put it in, in one of the ohv.

 

[spindlecone]

I was referring to Spindlecone's Pic's with the barbed connector he installed. Maybe I just didn't look hard enough. He did mention that it was hard to get to the PCV line. I'll take another look and try to post some pics if it ever stops snowing around here.

The PCV valve on my engine is on the backside of the driverside valve cover.
It is routed via hard plastic tubing to the front pass side of the TB

 

[Billy177]

there is so much suction that you can just pour the seafoam slowly into the tube and you can't miss

 

[spindlecone]

there is so much suction that you can just pour the seafoam slowly into the tube and you can't miss

The BB hose, any Vac line into the TB. will have the same amt of Vacuum.
The question is, the orig point of this post was, to determine the optimal insertion point.
Only makes sense to me it should be at the front of the TB where the airflow originates front to back.
All cylinders are sucking the same amt of air, to disperse the seafoam thru the rear BB hose, maybe only the rear cylinders get the bulk of the seafoam.
The tech at seafoam told me the PCV line is optimal, thats what I use.
Other Vac lines may work as well.

 

[Billy177]

the thing is at idle there is barely any air going through the throttle body it is almost completely closed