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Oil Leak, my disptick...and the "dipsticks at Toyota"!

Hello to all...my first post here, so go easy on me gang.

I've officially joined the illustrious ranks of the Sequoia owners last Saturday when I bought a used 2008 Sequoia 4x4 Platinum (Artic Pearl). So far, love it, but I do have cause to make my first contribution to the forum. So here goes.

As I was inspecting the vehicle for the first time, I obviously pulled the oil dipstick. In doing so, I immediately noticed a bunch of crud, beads of moisture, and milky stuff on the stick. :eek: Whoa...I thought...this ain't good...and I was thinking the worse...a blown head gasket?? Keep in the mind the previous owner had just driven the vehicle, so it was warm. Anyway, upon closer investigation, and checking the oil about a dozen times in a row, I noticed that with each new plunge/removal of the dipstick, the stick got cleaner and cleaner. The oil itself looked really good (it was just changed the day before)...amber, not milky or frothy. I then noticed that the little o-ring that is supposed to be at the top of the dipstick (on the plastic yellow handle) was missing. Hmmm. So, I put two and two together, and figured that this missing o-ring was allowing water ingress into the top of the disptick tube. Turns out, I was right.

Fast forward about 300 miles (yes, we bought it 300 miles from home). We got the vehicle home Sat night, and the next morning, I noticed quite a few drips of oil on my garage floor. Oh no, I thought....I bought darn lemon. Got under there and started investigating. From all the signs, it appeared as though this leaking oil was coming from where the dipstick tube enters the engine block....geez..another o-ring issue? Can't be. Well, it is/was. At that time, I cleaned the surfaces up really good (with contact cleaner) and put some high-temp silicone around where the dipstick tube enters the engine. That stopped the leak.

Today, I search these forums for "dipstick" and found that these are two fairly well known issues on the 5.7L engine. In fact, Toyota issued a TSB (which is attached in this thread) for the leaky o-ring where the tube enters the engine.

The REALLY disappointing thing is, the previous owner (bless his heart) just had the vehicle serviced the day before (Friday) at Glenn Toyota in Frankfort, and asked them go through it with a fine-toothed comb for the next owner (me). In short, the Toyota technician failed to recognize all of this milky gunk on the dipstick (due to water ingress from the missing o-ring), nor did he/she recognize or correct the leaking oil from the known defective o-ring where the dipstick tube enters the engine.

I will probably just go ahead and get the replacement o-ring (part number 96721–19010) in case my silicone trick fails. Keep in mind, that part number is for the lower O-ring...the one where the tube enters the engine. They do not sell the upper o-ring separately (the one on the dipstick itself), instead you have to buy the entire dipstick for about $16. I just bought a small o-ring at Home Dept for 19 cents. Didn't record the size, sorry. I'll also mentioned that the part number mentioned above is the same as the original o-ring, and not some re-designed one to prevent this problem from recurring. As such, it may leak again....so maybe get a few of these o-rings while you're at the "stealer".

Bottom line, I just wanted to introduce myself, say hi to everybody, and let them know that these dipstick/leaking oil issues can affect the Sequoias too.

Cheers,
Toolman_Johnny
 

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thats thinkin with your dipstick jimmy...er....johnny actually.
 
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