2006 1hz BEB question.

[craigbuilt]

I have a 1hz in a 97 fzj80 runs smoothly. The 1hz was made/manufactured in 2006 according to the date stamp on the valve cover. I have read several threads on 1hz bottom end bearings being soft and having issues on older motors. The question is what year did Toyota change there BEB to something more robust. Or is a 1hz produced in 2006 effected with known BEB problems?

I am going to be installing a g turbo on the motor and am wondering if the added pressure will be an issue with the BEB. I know that the Pistons in the 1hz motor are thinner than the 1hd_t... ect... Being a newer 1hz with the redesigned oem pistons, are they any more robust than the older style pistons, do they handle being turbocharged better?

Any thoughts would be helpful. Thanks

 

[desertbuckeye]

I wish I could help as Im only in my research phase of doing a diesel conversion, but I would love to know where you bought your 2006 1hz! Looking at doing a 1hz swap myself

 

[roscoFJ73]

BEB problems on 1HZs are rare.I think many of us on this forum believe it is more to do with the pistons and combustion chamber on the 1HD T being the root problem of BEB failure.
I checked the BEB on my 95 HZJ75 a few years back. This was a refurbished Landcruiser from an outback location with the original engine and at 200000 klms they were like new.
I doubt the pistons will be much different as the early types worked fine without a turbo. If your worried about it you can get aftermarket pistons which are a bit more turbo resistant.
Overall ,there were not too many changes to the 1HZ ,in stock form it performed beautifully. The biggest upgrade was probably the timing gear.

 

[B Point]

Unfortunately...only us with the 1HD-T have that issue to incessantly stress about.

 

[Greg_B]

NA 1HZ's don't seem to have the same issue and are rare as roscoFJ73 says. We have seen bad bearings on HZ's that have been turbo'd, but again...not as often.

hth's
gb

 

[OGBeno]

I wish I could help as Im only in my research phase of doing a diesel conversion, but I would love to know where you bought your 2006 1hz! Looking at doing a 1hz swap myself

You can buy brand new 1HZ's..... Not cheap, but available.

 

[chappohj47]

Early 1hdt only problem