Toyota 2AZ-FE - Engine Rebuilt

[Anees]

I am from Trinidad in the Caribbean.

My Toyota Estima has a 2AZ-FE engine and it suffered an engine overheat causing me to have to rebuild the engine. I had to Shave the Block, Re-Sleeve the cylinders, Re-thread 10 bolt holes in the Block, Replace Pistons, Rings, Seals & Gaskets. I also replaced the water pump, 2 coil packs and the Radiator was re-built in metal instead of the original plastic - it was cracked (which caused the whole mess). OH ! I also had a misfiring problem (after the engine was rebuilt), which was rectified by replacing the Camshaft Timing Oil Control Valve Assy.

We experience temperatures of about 31-40 Degrees Celsius here in Trinidad. My mechanic told me to use 20W 50 Castrol GTX oil in the engine. I normally used Mobil 1 10w30 Clean5000 oil. I find his recommendation a bit strange. He tells me that my engine is old (Manuf. in 2001) so I need a thicker oil. Is this correct ? Or is he setting me up for a quick death to my newly rebuilt engine ?

 

[Michael_P]

Ive rebuilt several 2AZ-FE engines for the same reason. Thread insert the block, (though Toyota says you can't) and problem solved. 31-40 Degrees Celsius is rather warm. A 10W30 should be fine. A friend of mine who lives in Jamaica uses 10W40 in his 2AZ-FE Camry. A 20W50 would work too, as long as temps didn't go too far below 25 degrees Celsius. Those 2AZ-FE's seem to be to OK with a thicker oil. Here in the states, that would be too thick though.

 

[Anees]

neh... we never go below 28 degrees celcius and that's only in the nights. 28 is rare ! days are always around 30 and higher year round.

But I getting this knocking noise on mornings sounds like it's coming from under the tappet pan cover. When the engine warms up the sound goes away... One local mechanic told me that the oil is taking too long to get to the top of the engine because it too thick and I am wearing and stressing the lifters every morning I start.. and he told me that 20W 50 is BAD for my engine ?!?!?

 

[Lethal1ty17]

use 10w30 and call it a day. 20w50 is too thick and is causing the start up knocking, it wont flow fast enough.

 

[Hokiefyd]

The engine design may be an old one, but with a fresh rebuild, you've got new bearings and new bearing clearances. Use the 10w30.

 

[maersk]

I'd use a 5w40. Then again, that's like the only viscosity I seem to know about and I always say that, no matter who's asking or what car they've got.

0w40 or 0w30 for really cold climates.

 

[NateDN10]

I'll throw in another vote for sticking with the 10w30 you had been using.

 

[Anees]

Didn't change the bearings... Just the items i listed initially and valve seals (intake and exhaust).