1HDT bearings

Submitted: Sunday, Jun 03, 2007 at 19:46
ThreadID: 46237 Views:7565 Replies:4 FollowUps:4
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To anyone/Dozer,

Decided to start a new thread rather than hijacking the other Dozer. I've read plenty about the bearing issues with the 1HDT and how they need to be changed. My understanding is that the bearings Toyota provided were the issue, not the motor? If so are they still an item to be changed every 100k or are the new bearings fine and the 1HDT is now as relieable as any of the other big Toyota diesels? For peace of mind it might still be best to do them with the timing belt, or is that overkill?
Thoughts gents?

Ben

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Reply By: hiab - Sunday, Jun 03, 2007 at 20:08

Sunday, Jun 03, 2007 at 20:08
dont buy genuine bearings, clevite or such aftermarket ones are just fine, put em in and forget.
AnswerID: 244477

Reply By: awill4x4 - Sunday, Jun 03, 2007 at 21:02

Sunday, Jun 03, 2007 at 21:02
I have heard of bearings failing even after having been replaced on the Yahoo 80sCool site so for peace of mind I would be changing them at every 100K period.
For the cost involved versus a potential engine rebuild it's cheap insurance I would say.
Regards Andrew.
AnswerID: 244496

Reply By: Member - 120scruiser (NSW) - Sunday, Jun 03, 2007 at 21:05

Sunday, Jun 03, 2007 at 21:05
From my experience it was the post update model in 1992, September, 1HDT engines that had the problems. The ones after this are OK.
Toyota had two suppliers of their big end bearings. One set were OK the other had delamination problems. The only drama is that Toyota didn't record which bearings went into what engine so replaced them as they showed prblems.
120scruiser
AnswerID: 244498

Follow Up By: 93 Navara - Sunday, Jun 03, 2007 at 21:24

Sunday, Jun 03, 2007 at 21:24
120scruiser,
That's why I ask cruiser? If the bearings have been identified, and replaced already, is the problem sorted?
Ben
ps Anyone know how to change your member name on this. Tried and failed, and the Navara is now up for sale.
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FollowupID: 505466

Follow Up By: Troo Bloo - Sunday, Jun 03, 2007 at 23:17

Sunday, Jun 03, 2007 at 23:17
120 Cruiser,

I nearly bought an 1990 80 series factory turbo diesel, but was turned off by the price to change out the big end bearings. From the people I spoke to the engine had to come out of the vechile for the bearings to be changed. Do you know if this is true and how much approx would cost to change?

Troo Bloo
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FollowupID: 505537

Follow Up By: Member - 120scruiser (NSW) - Monday, Jun 04, 2007 at 08:08

Monday, Jun 04, 2007 at 08:08
Troo Bloo
You can do it whilst the engine is still in the car. You take the sway bar off, the steering drag link and then the sump. You can then do a big end bearing roll. I don't like putting prices up on forums so you would have to email me direct so we can talk.

93Navara
I haven't had any problems with engines that have had the bearings done. The ones that had trouble were identified by the big end noise and was generally an engine rebuild be Toyota. There are plenty that never gave problems and you would think by now the problem is sorted but you never know. Sorry I can't help you out any further.
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FollowupID: 505566

Reply By: Member - DOZER- Sunday, Jun 03, 2007 at 23:32

Sunday, Jun 03, 2007 at 23:32
My friend has a 91 hdt and when he bought it, he had the bearings done under warrenty recall...(it hadnt been taken in) they were pitted bad. After another 100k kms he did them again, and the acl bearings came out bad again, so in went another set. His oil pressure is 60 cold, 35 hot and 15 idle. 35 is not enough for such a big motor running up to a theoretical 4100 rpm. The 1hz for example, on thesame oil, runs 90 cold 60 hot.
Now my friends cruiser may have oval rods, i was told by the owner of the shop they do that...and no matter how many bearings are replaced, they will all come out thesame.
For $500 each 5 years, id do the bearings to be sure....if the last ones come out lovely, id consider not doing them again. The other thing to mention is the owners manual stipulates Japanese CD grade oil....this is not thesame as SAE CD....the Jap cd grade has high calcium content. Castrol CXJ is one that is Jap CD. I run it in mine, and i would recommend you do too. High calcium in oil helps bearings....ive also been told that the hdt in the Japanese domestic market had no such big end failures...
Andrew
AnswerID: 244550

Follow Up By: 93 Navara - Monday, Jun 04, 2007 at 08:39

Monday, Jun 04, 2007 at 08:39
Thanks to all for the quick replies.
Might stick to changing them with the timing belt for piece of mind.
Ben
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FollowupID: 505572

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