Power steering pump

[Mike NXP]

I am really confused about the control valve you mentioned on step 5 of your observations. I don't see mention of it in the actual instructions. Doesn't this valve come with a replacement vane pump assay? When I installed the new pump all I needed to attach was the short 5/8 hose to the reservoir and the banjo bolt, which doesn't strike me as a control valve. Is that bolt the thing you are referring to?

Is it this? 1763016040 GENUINE Toyota AIR CONTROL VALVE 17630-16040 | eBay
Pricey... Is it possible to refurb with simple green and a brush to clear it out?

Its not a matter of cleaning it, more like the plastic valve just gets fragile over time .

There are two vacuum lines coming off the rear of the pump headed towards the intake. The lines gets really dry and sometimes the connection breaks at the pump.

My new pump did not come with the vane , I reused my old one which broke a few months later when I moved the pump to get at tensioner pulley.

 

[Beto Cruiser]

Thanks for the info. I replaced my valve a few months ago with the doorman one (~$70). Made no difference. I think the only time it needs to be replaced is if you start leaking PS fluid into the plenum. Or if it breaks. I had neither of those issues so I basically threw away $70.

 

[samgoheat]

I'd make real sure it's actually pump leaking. Very common for hose(s) to leak then the fluid runs down onto pump.

yes.My ‘99 was whining turned into grinding and power steering turned into manual steering. It ended up being leaky hose at a clamp site

 

[TennisThomas]

Yours may come with that, mine did not. The "air idle" valve was a separate 80.00 part with very fragile (relatively) nipples. Just removing the clamp from the vacuum hose and rotating broke mine off. I purchased a reman unit from...DA, I think..but i can't recall anymore who that vendor was. The control valve looks like a Schrader valve on one end, and horn-like nipples on the other.

Was there a trick you used to undo this from pressure hose without breaking anything? I'm knee deep in this project and feel like I may snap something else besides 17630-16040.

 

[Mike NXP]

Was there a trick you used to undo this from pressure hose without breaking anything? I'm knee deep in this project and feel like I may snap something else besides 17630-16040.

The air vane at the rear of the pump is hooked up to vacuum lines not high pressure. You do need to move the pump forwards to be able to fully thread/ unthread that part if needed ...fluid will come out when removed so work quick if already installed.

 

[cruiserpatch]

@2001LC I found an interesting inconsistency for torque specs on the three PS bolts holding the pump to the block.

Observe:

I know for a fact that these three bolts need to be torqued to 46 ft-lbs (I've done enough timing belts on these to know that 13 ft-lbs is wildly lose.

For all those doing this job, make sure you torque the Vane pump bolts to 46 ft-lbs

 

[2001LC]

@2001LC I found an interesting inconsistency for torque specs on the three PS bolts holding the pump to the block.

Observe:

View attachment 3003190View attachment 3003191

I know for a fact that these three bolts need to be torqued to 46 ft-lbs (I've done enough timing belts on these to know that 13 ft-lbs is wildly lose.

For all those doing this job, make sure you torque the Vane pump bolts to 46 ft-lbs

Why do say an "inconsistency"?
Have you found a reference somewhere to these 3 vane pump mounting bolts, requiring 46ft-lbf or anything other than 13ft-lbf?
How do you "know for a fact" spec is 46ft-lbf, which is so much higher than 13ft-lbf?

I use FSM's from 98-07 (hard copy, PDF and TIS). Nowhere I've a seen anything different than 13ft-lbf.
In the 5.7L (200 series), Toyota uses only 2 vane pump mounting bolts. There they did go to a 2 ft-lbf higher torque spec of 15ft-lbf. Which is a far cry from 46ft-lbf.

Toyota uses very light torque spec. Especially where aluminium and steel components torqued to together. Such as the vane pump, of which back halve of case is aluminium.

I do find inconsistency with some torque specs, from page to page. These are generally no more than ~8%. Which I contribute to rounding-out when converted to ft-lbf.

 

[cruiserpatch]

Why do say an "inconsistency"?
Have you found a reference somewhere to these 3 vane pump mounting bolts, requiring 46ft-lbf or anything other than 13ft-lbf?
How do you "know for a fact" spec is 46ft-lbf, which is so much higher than 13ft-lbf?

I use FSM's from 98-07 (hard copy, PDF and TIS). Nowhere I've a seen anything different than 13ft-lbf.
In the 5.7L (200 series), Toyota uses only 2 vane pump mounting bolts. There they did go to a 2 ft-lbf higher torque spec of 15ft-lbf. Which is a far cry from 46ft-lbf.

Toyota uses very light torque spec. Especially where aluminium and steel components torqued to together. Such as the vane pump, of which back halve of case is aluminium.

I do find inconsistency with some torque specs, from page to page. These are generally no more than ~8%. Which I contribute to rounding-out when converted to ft-lbf.

I should have posted this as well. Taken from the timing belt section of "Engine Mechanical" in a 2004 FSM

I have always used the 46 ft-lbs torque for these bolts. I'm not sure which is correct but I would imagine it is 46 since the alternator bolts/nuts are similar torque spec.

Any clue for future clarification/best practice?

 

[2001LC]

I should have posted this as well. Taken from the timing belt section of "Engine Mechanical" in a 2004 FSM

View attachment 3003250

I have always used the 46 ft-lbs torque for these bolts. I'm not sure which is correct but I would imagine it is 46 since the alternator bolts/nuts are similar torque spec.

Any clue for future clarification/best practice?

I'd use 13ft-lbf..


Good catch on the inconsistency, which I see is in the 03-05 FSM only. It looks like the 03-05 FSM has an error that was later corrected.
Prior years (98-02) do NOT have a torque for Vane on same page in Engine section over view diagram.
In 06-07 they show 13ft-lbf on same page.

But in all year 98-07 under power steering, vane pump they show 13ft-lbf.
In year 98-02 FSM show 17ft-lbf for the bolts that hold the vane pump case together, that come in from back side. In 03-07 they reduced that to 16ft-lbf.

So if you torque the mounting bolts to 46ft-lbf. You effective are torquing the 2 halves of the vane pump case together, at 350% above recommended torque.

 

[cruiserpatch]

I'd use 13ft-lbf..


Good catch on the inconsistency, which I see is in the 03-05 FSM only. It looks like the 03-05 FSM has an error that was later corrected.
Prior years (98-02) do NOT have a torque for Vane on same page in Engine section over view diagram.
In 06-07 they show 13ft-lbf on same page.

But in all year 98-07 under power steering, vane pump they show 13ft-lbf.
In year 98-02 FSM show 17ft-lbf for the bolts that hold the vane pump case together, that come in from back side. In 03-07 they reduced that to 16ft-lbf.

So if you torque the mounting bolts to 46ft-lbf. You effective are torquing the 2 halves of they vane pump case together, at 350% above recommended torque.

Maybe that’s why it’s squealing haha.

I’m replacing mine tomorrow and I’m glad I checked. Thanks so much. You’ve been a big help to me throughout the years

 

[acoleFJ80]

Have a fun one, did the heater t's as a new to me 100 this weekend. PS Pump valve was broken and one of the vac lines was not attached. Picked up one on Amazon, and it was not closed. All the fluid pumped into the intake and/or drained on the ground. Pulled the old one out of the trash bin and reinstalled. Anyone had this issue?

 

[Mike NXP]

Have a fun one, did the heater t's as a new to me 100 this weekend. PS Pump valve was broken and one of the vac lines was not attached. Picked up one on Amazon, and it was not closed. All the fluid pumped into the intake and/or drained on the ground. Pulled the old one out of the trash bin and reinstalled. Anyone had this issue?

I've seen it mentioned for sure,not common but it does happen
Some folks would see smoke on startup and led to being power steering fluid being sucked back into intake like you mentioned...nice find and fix