Pesky Heater Hose Neighbor (1 Viewer)

[mod5csi]

Way do you need to remove the TB often enough to make that necessary?

Kinda wonder why everyone thinks they need to replace that throttle body gasket all the time. It is a metal gasket with NO sealer on it. It does not seal any fluids, just prevents air leaking into the intake. We have reused them repeatedly with NO failures. John

I agree with both these observations.

I would add that adding a loop that high in the system could potentially trap air. Causing more cooling problems. (Ask any Subaru maintainer). You want the fill location to be your highest point in the system.

Get yourself some long needle nose pliers, and some hose pliers and stand there an extra 10 seconds fiddling with the forward TB hose.

Likely, you've spent more life-time taking pictures and typing than you ever will messing with that hose in the trucks life.

As for the FHH, yeah it's a pain.

 

[DARKNESS]

I did the "FHH" when I did my supercharger. It wasn't really very hard. Pretty sure I was on my back under the vehicle and just reached through the wheel well.

 

[jfz80]

Sounds like you got it under control but a temporary patch if it's leaking at the TB nipple or block nipple is to remove, cut off last inch or so, and reinstall. Quick and easy but doesn't address the fact the entire length of hose is probably 20 yr old but can get you home without much fuss

 

[Bambusiero]

Way do you need to remove the TB often enough to make that necessary?

I dunno. Trying to think back and remember them all.
Fuel injector issues, 2x.
TPV or some emissions thingy.
Reading spark plugs.
Replacing spark plugs
Compression test.
FHH.

I guess it's matter of responding to whatever causes one personal frustration. YMMV.

It's the short front tube that's a pain.
It ties in the throttle body on a very short leash, making it hard to dock / un-dock, and then getting pliers on the spring clamps at awkward angles is, well...awkward. I never seem to have bent pliers bent in exactly the right way to get deep in there, around, underneath, etc.

The photo's were done in moments, 110F outside, without breaking a sweat.
Besides, Metzgerhund, the OP asked for photos & also asked what I meant by the 360 & 270 loop comment.

Kinda wonder why everyone thinks they need to replace that throttle body gasket all the time. It is a metal gasket with NO sealer on it. It does not seal any fluids, just prevents air leaking into the intake. We have reused them repeatedly with NO failures. John

Agreed. Have never replaced it, myself.

... cut off last inch or so, and reinstall.

That's a good suggestion for the front tube too. Keep feet of extra tubing in stock. (You will find it useful for something else sooner or later) Don't even try to un-clamp it, just slice it off. Replace when remounting. However, sliding the tube over the nipple, at right angle to the throttle body mounting pins that you are trying to line up, while keeping the gasket in place...it's still a pain. Sex-lube recommended.

A little tube slack means never having to say #$%&!!! again.

Anyhow, no need to it's just a suggestion.

 

[deltapine1]

Does anyone have the OEM Toyota p/n for the TB hose handy?

Thanks in advance

 

[Sharky1528]

^^^^ THIS ^^^^

 

[Tools R Us]

Does anyone have the OEM Toyota p/n for the TB hose handy?

Thanks in advance

16261-66040

 

[Tools R Us]

I did the "FHH" when I did my supercharger. It wasn't really very hard. Pretty sure I was on my back under the vehicle and just reached through the wheel well.

On a S/C rig would for sure use aftermarket hose, 5/16" fits best.

 

[deltapine1]

I wish mine was supercharged! Part ordered and will be here tomorrow. I replaced all and I repeat all of the coolant hoses in September last year and included a new thermostat, heater control valve, etc. All were OEM Toyota parts other than rear heater hoses you cannot get from Toyota. Those items were fit with Gates Green Stripe 5/8" and 3/4" were needed.

The Coolant Bypass Hose # 1 was replaced at the same time and failed at the 90 turn up from the block end toward the TB. I do not recall crimping or handling it roughly installing it.

Frustrating but even Toyota makes a bad part once in awhile. Or at least their rubber supplier.

 

[madisonr34]

If don't really need the coolant running through the throttle body, you can just bypass the whole system. That' what i did. 15 min job.

 

[BILT4ME]

Just an FYI to speed up installation:

My friend and I were doing the throttle coolant hose on his 94 LC last night. He was already doing the VC gasket so he had the TB already off, so I suggested he do this hose.

Good thing, as the lower end was swelled and soft.

Pulling the old hose was easy, just grip the clamp, pull it back, and yank. Literally about 1 minute. Access through the fender well.

Installing the NEW hose was more challenging because we slid the clamp back on the hose so we could slide on the hose, then set the clamp.

After 30 minute of jacking with the clamp and trying to get it properly squeezed and pushed on the hose and nipple, we pulled the hose back off.

I reset the clamp on the hose, but this time installed it in what should be its final resting place. I spit in the end of the hose for lubrication, slid under the truck, and shoved the hose on in about one minute. Definitely the way to install it is with the clamp already in place.

 

[ZackR]

Just an FYI to speed up installation:

My friend and I were doing the throttle coolant hose on his 94 LC last night. He was already doing the VC gasket so he had the TB already off, so I suggested he do this hose.

Good thing, as the lower end was swelled and soft.

Pulling the old hose was easy, just grip the clamp, pull it back, and yank. Literally about 1 minute. Access through the fender well.

Installing the NEW hose was more challenging because we slid the clamp back on the hose so we could slide on the hose, then set the clamp.

After 30 minute of jacking with the clamp and trying to get it properly squeezed and pushed on the hose and nipple, we pulled the hose back off.

I reset the clamp on the hose, but this time installed it in what should be its final resting place. I spit in the end of the hose for lubrication, slid under the truck, and shoved the hose on in about one minute. Definitely the way to install it is with the clamp already in place.

@BILT4ME Planning to do my valve cover gasket soon and would like to tackle this hose while in there. Did you end up buying the Toyota hose or were you able to use bulk hose?

 

[BILT4ME]

@BILT4ME Planning to do my valve cover gasket soon and would like to tackle this hose while in there. Did you end up buying the Toyota hose or were you able to use bulk hose?

He bought the Toyota hose. It has some specific bends in it that makes it easy to keep in place. If I do mine, I will do the Toyota hose, not bulk, but I like easy these days......

 

[deltapine1]

p/n 16261-66040 Coolant Bypass Hose # 1

 

[ccslider]

You shouldn't use worm drive clamps on silcone hoses, especially ones that are 17 inches too big..

 

[MoJ]

You shouldn't use worm drive clamps on silcone hoses, especially ones that are 17 inches too big..

I’ll suggest that silicone hoses are unnecessary, in any 80 application, period.

 

[LINUS]

Kinda wonder why everyone thinks they need to replace that throttle body gasket all the time. It is a metal gasket with NO sealer on it. It does not seal any fluids, just prevents air leaking into the intake. We have reused them repeatedly with NO failures. John

My guess is it’s the 1st time alot of people are removing some of these components & are still thinking cork gaskets that used to crumble.

But people also gave me crap for cutting the lower intake manifold casting flash where they pass the wiring harness through it - I’ve never had to pull it yet, but it’s one of those things I know for down the road I can save myself grief because of that design flaw.

 

[mitchellmmm]

If don't really need the coolant running through the throttle body, you can just bypass the whole system. That' what i did. 15 min job.

Hey can you go into detail on this one? I don't need heat into anywhere, living in Hawaii

 

[madisonr34]

Hey can you go into detail on this one? I don't need heat into anywhere, living in Hawaii

I borrowed this picture from Wits end. The bypass is simple but the hardest part is clamping the hose connection at the cylinder head. You can leave the throttle body connections open or you can cap them with vacuum caps. I believe the size hose I used was 5/16.

 

[77mustard40]

Thread revival, gents I sprung a leak in my FHH so I’m going in to replace it. I’ve got the hose but have a question regarding the TB removal to get to the hose connection. I just pulled all 4 bolts to the TB and eased the gasket out so I don’t mess it up. What’s the deal with the top passage (I use that term loosely) between the top two bolt holes? Is that supposed to be an open passage? You can see it’s mostly blocked, appears to be carbon buildup? Or is that space supposed to be closed? Time for a new gasket?