Throttle body gunk question.

[Slowerthanyou]

I am doing a head gasket on my 95 4Runner 3.0 and apon removing the throttle body I see this crazy gunk Iv never seen before as in the picture. If anyone has seen this crap before let me know the reason this is here.
Also I'm new to this forum and I'm looking for a good DIY for the head gasket. Just for back up incase Im having any problems this would help, so if someone could send me a link it would be appreciated.

 

[LedFloyd900]

How did that thing even run? That's a ridiculous amount of junk in there :jaw:

 

[mikekfr]

In a generator or lawnmower, if the gas sits in the carb bowl for a long period of time. It will first turn to a neon colored gatorade and at that point it's trash and it needs to come out. After that period, the old gas becomes likes crystals, white pop rocks if you will.....i'm no expert but i can relay what i've seen in carburetor bowls that the engine won't start. This is the result of not using 'non ethanol' gas IMO, and also just neglect by letting gas sit for very long periods of time. In most cases, a good cleaning along with emptying the junk out of the carb. bowl is all it takes to get it running again.

Junk, additives & i guess 'ethanol'? are responsible for that crap imo......i'd get a shop vac going and start cleaning....i'd use a hook tool to pull all of that junk OUT that you can....then spray and clean it......a toothbrush would work good.

Also, go get a tetanus shot :behindsofa:

 

[Slowerthanyou]

Awesome thanks for your info. I'm still interested in a good DIY for the head gasket.

 

[Ahlem]

Dremel plus a fine cup brush plus a shop vac. Use finesse and check early to see if you are using enough finesse.

 

[gtgt_bangbang]

oh jezuz that looks like my nostrils in monday traffic after a weekend in the desert. did you find the gorilla that hacked it up?

PS there is no fuel at that point in the induction --- the injectors are right next to the head in the lower intake manifold. What have you been driving thru, beehives?

that aint gas residue. I'm genuinely confuse what it could be.

There is a single 'cold start injector" in the UPPER manifold, which must have been pissing in mine, cos the upper plenum was pretty thick with carbon crunchies. To clean it, I hosed it with good old paint stripper and now my toilet brush looks kinda dark. Take that thing OFF the motor to work on it, find out whats behind that butterfly valve.

 

[gtgt_bangbang]

if you are going to save your motor and not extremely versed in the process, I highly recommend the Toyota service manual. Even if you are already a jughead-wearing Goober its worth the small investment to see how things are done Right, and back slide from there.

Sorry to rain on the parade but a crappy or half-baked repair can cost you a lot of disappointment and probably some extra cash. yeah a lot of info is online too, but they you run into the guy for instance who buttered BUTTERED I MEAN HANDFULS OF GREASE into his brand new cylinder bores & pistons, great glistening gobs of grease for 'break-in protection". In other words there is TONS of really crappy advice on you tube.

The FSM is not the best organized I have ever seen but lots of juicy info. If I get a new keeper vehicle, I usually find a bargain basement gsmudgy copy of the official manual before I even do the title work.

Haynes is usually the next best imho and all the others make decent fire starters.

 

[gamefreakgc]

The PCV valve is the only thing adding any sort of oil or fuel residue to the throttle body. I would replace it when you do the head gasket, it's a $4 part. If the grommet is bad (read brittle) then replace it too.

By chance, did anyone ever run this rig without an air filter, or some sort of home-made intake?

 

[wallytoo]

The PCV valve is the only thing adding any sort of oil or fuel residue to the throttle body.

no. EGR valve is attached to the upper plenum, too (as is the PCV valve/breather). neither is attached to the throttle body itself.

 

[gamefreakgc]

That's if he has one though. Not all vehicles do. I doubt it would be the EGR since it's only taking exhaust gas from the headers and recirculating it. If one has oil or crud coming out of the combustion chamber than I daresay the engine is completely toast, or has a dead cylinder.

 

[wallytoo]

EGR - exhaust gas recirculation. to reintroduce unburned fuel back into the intake chamber. unburned fuel is fuel residue.

 

[Howitzer]

Whiskey tango foxtrot!? What the hell have you been driving through!?!

 

[Scalded_Dawg]

Nasty...

Highly recommend the Toyota Factory Service Manual (FSM). I was able to find a copy to download - there's a sticky thread in the Classics section.
I have the Haynes manual as well... I found it pretty worthless for any deep engine related work. The pics and descriptions are far better in the FSM.

 

[Slowerthanyou]

Iv never even driven this thing before. And the previous owner was an older gentleman who owned the car for a year or so. So I can't say what it's been through. I wish I knew though ��. Anyways the heads are coming off today.

 

[gamefreakgc]

1993 Toyota Pickup Service Manual

Don't worry that it's for a pickup or a 93. The engines are identical, I've worked on 4Runners and Pickups and there's no difference.

 

[Slowerthanyou]

I ordered a Haynes Manuel a couple days ago waiting for that now. The toyota service Manuel seems to be a little pricey. I know it's why I should get but I'm working with what I got.

 

[gamefreakgc]

The link I posted is a free online PDF of the Factory Service Manual. You could use it as a reference in case the Haynes isn't very clear in some spots.

The FSM is a bit over the top sometimes and hard to understand.

 

[Slowerthanyou]

Oh wow thanks so much! Don't know how u missed that link. I'll look into that if I run into any problems.

 

[gtgt_bangbang]

the coolant passage through your throttle body is leaking

there is a coolant path through your throttle body near there.

hose connects a vertical pipe from front of lower intake manifold, thru throttle body , to 2nd hose to bypass pipe at rear of engine.

somehow its leaking into you air passage. Throttle body has some componets on the side , kind of a tear dropped shaped stamping held by a couple screws. Probably a seal etc under that cover that is leaking.

DamnifIknow what it looks like inside, not taking mine apart , but looks like you are !