Comprehensive 4.0 1GR Cooling System Refresh - OEM Part Numbers & Quantities

Ah, damn...yep, that'll do it. ~20 isn't far off of 18.5, but it's definitely not nothing. That said - I did mine on Saturday and the black part of the MLS gasket was very, very brittle and while I expected a battle to clean up the gasket surfaces, it just flaked off; I doubt they have infinite life. No regrets doing mine, especially while already in that deep.

 

Realize that 20 PSI is a lot more than the stock Taco radiator cap at 16 PSI!

I am glad that you got it done without issue. If I were going in that deep, I'd take a crack at it myself. Fortunately, I don't have to (yet).

 

Thanks! Looks like I ordered it but never received it. Gates 18337 is a replacement as well.

 

Well, I was referring to the TRD cap, being an OEM accessory, and presumably an endorsed "setting" for the system..but yes 20 relative to ~14-15 is significant!

 

There's no point in the higher pressure radiator cap unless you currently causing the stock cap to pressure past it's limit and then it's likely something else is going on, in fact it can be very bad idea as Fay found out. It was a thing on dirtbikes for awhile when a well known company started selling 20bar caps and suddenly people were having waterpump seal failures. I'd skip the TRD one also considering its only 1.5 bar below the cap that blows seals and we already know the tacoma has tendency for a coolant bypass pipe leak. Higher cooling system pressure doesn't improve anything except to raise the coolant's boiling point and that's to combat possible boil overs. Higher pressure caps are rarely if ever needed and when they are they're typically a bandaid for inadequate cooling. 119 degrees in DV didn't phase the stock cooling system or cap on my 4.0L and the cooling system worked fine but I could monitor temps via obd and saw 219F. I much prefer data when possible for deciding a mod on a critical system. Living in a desert our temps are something I keep an eye on. I don't know about anyone else but in my experience these trucks don't boil over unless something is wrong. I'd combat possible high temps with a radiator before a different cap. Raising system pressure is gateway to possible cooling system problems down the road.

The potential result of a seal failure from over presurization is possibly overheating the engine, considering that's what this whole refresh is supposed to prevent seems counter intuitive. My cooling system refresh was 100% to prevent an overheating situation down the road, alum blocks like to blow headgaskets when they get too hot.

 

I totally agree with this. I am, however, upgrading the radiator to a

$499 CSF 7092 2016+ 3.5L and 2.7L 05-15 4.0L and 2.7L fits Toyota™ Tacoma Radiator

CSF 7092 because it is all aluminum.

My OEM (Denso) radiator is still working OK, but the OEM (Denso) radiator in my '01 Toyota Avalon blew it's seal between the plastic ends and aluminum fins last year (22 years of service). I drive my Tacoma back and forth between Massachusetts and Florida every year, and I don't fancy sitting on the side of the road in nowhere PA with a radiator leak.

I had originally ordered a Denso to proactively replace the original, but when it arrived, the box looked like it had been shot at, and the protective caps on the transmission cooler element were broken.


The CSF arrived well packed, looks to be very robustly built, and the lack of plastic should hopefully mean that I have one less thing to worry about failing.

 

Only on a Toyota forum would 22 years of service in the salt belt be considered unacceptable...

 

Well, that's 22 years of Florida sunshine & heat... but yeah. That radiator owed me nothing.

 

Do you have a similar list for the steering/suspension parts?

 

You betcha.

 

Hook it up broski! Link?

 

I just have a spreadsheet for now, planning to organize and put a thread together hopefully later this week as I get to it, sort of like this one.

Phone update screwed my mobile use of Tacomaworld and I got derailed a bit with planning an FJ based AWD conversion (and of course, holidays), so I've not been keeping up with progress here but long story short there have been no issues, I'm basically down to popping hoses back on for the cooling side of things. That said, only thing gone awry, if you can call it that, is a couple redundancies with O-rings; the thermostat came with one for it, and the water pump came with both the O-rings involved with changing it (which makes sense since that forward housing has to come off to get the pump off).

If you need something ASAP: PartSouq.com is a fan-freaking-tastic resource once you get used to navigating around. Also helpful is rooting around on ebay listings - and last but not least, I've had good luck reaching out to guys at the dealer parts departments before ordering, I've found them to be way more helpful than I expected for validating stuff for online orders. They probably get paid the same no matter online or retail customer, and if nothing else, less returns for them to deal with if they get it right, haha.

 

All good and appreciate the info. No rush on my end. I have more than enough projects to keep me busy but suspension and steering components are definitely on my list.

 

Just popped my last hose clamp and seemed to pass a dry pressure test @15psi. Looks like the parts list is good to go outside of adjusting numbers for a couple O-rings.



I gotta say though, I looked around at a variety of hose clamp tools..and while there were a couple I couldn't get to and had to use plier-type tools, this Lisle #17300 is friggin' sweet.



I was apprehensive about trying these as I had started with their "hose clamp vise" type, which were good in theory and looked really nice - but sadly, poor tolerances and a design flaw meant they would just bind up in the last ~15% of travel; and the the "drive knob" would pop off when you would try to loosen it. If I had been testing in an actual tight spot that could have created a lot of extra work, but I was able to get vise grips on the lead screw and coerced it off with some swearing..