Toyota 1HZ ideal tappet setting, turbo/non turbo?

Submitted: Thursday, Apr 02, 2009 at 13:26
ThreadID: 67445 Views:5050 Replies:3 FollowUps:6
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G'day all, any experience with different tappet settings for 1HZ turbo? different to non-turbo? thanks, aussiedingo
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Reply By: BarryBA - Thursday, Apr 02, 2009 at 14:47

Thursday, Apr 02, 2009 at 14:47
You can find a complete 1HZ engine manual here http://www.scribd.com/doc/7110020/1hd-1hz-1pzt-Engine - 348 pages of it . You might find what you are looking for there.

Barry
AnswerID: 357678

Follow Up By: toyotabits.com - Thursday, Apr 02, 2009 at 16:27

Thursday, Apr 02, 2009 at 16:27
Thanks Barry, I know the factory settings but some users prefer different settings for their turbo, thanks again, aussiedingo
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Reply By: Member - Phil G (SA) - Thursday, Apr 02, 2009 at 16:10

Thursday, Apr 02, 2009 at 16:10
The valve clearance is not readily adjustable. To change the settings you'd have to change the 12 shims. Never heard of anyone going to that much trouble.
AnswerID: 357683

Follow Up By: toyotabits.com - Thursday, Apr 02, 2009 at 16:25

Thursday, Apr 02, 2009 at 16:25
G'day Phil, I am in the process of doing new pistons, rings & bearings, as well as the head right now in my shed, I have heard a lot of different valve settings - want to hear more from experienced users, thanks for your reply, aussiedingo
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Follow Up By: Member - Phil G (SA) - Thursday, Apr 02, 2009 at 16:48

Thursday, Apr 02, 2009 at 16:48
I wasn't sure whether you were referring to the factory turbo 1HD-T or a 1Hz with aftermarket turbo. But in any case, they have the same clearances:
Inlet 0.15-0.25mm
Exhaust 0.35-0.45mm
I have 3 manuals and a sticker under the bonnet of my daughter's 1Hz which all give the same specs.

The 1HD=FT 24 valve factory TD is totally different with adjustable tappets and slightly different clearances.

There a link to 1Hz clearances and an Excel spreadsheet HERE.
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Follow Up By: toyotabits.com - Thursday, Apr 02, 2009 at 17:29

Thursday, Apr 02, 2009 at 17:29
Thanks again Phil, mine is a 1HZ with after market turbo, thanks again for the info
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Reply By: hotfishez - Thursday, Apr 02, 2009 at 16:39

Thursday, Apr 02, 2009 at 16:39
If it is a 1HZ with after market TURBO set them to the open side of the specs.

STD Intake 1.5 - 2.5 set between 2.0 and 2.5 for turbo
STD Exhaust. 3.5 - 4.5 set between 4.0 and 4.5 for turbo

Factory 1HDT is the same specs I believe but check first

DO NOT GO OUT SIDE THE SPECS
AnswerID: 357690

Follow Up By: toyotabits.com - Thursday, Apr 02, 2009 at 17:31

Thursday, Apr 02, 2009 at 17:31
Thanks hotty, this is more what I'm looking for, aussiedingo
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Follow Up By: Member - Nick (TAS) - Friday, Apr 03, 2009 at 08:02

Friday, Apr 03, 2009 at 08:02
It usually better to set them on the higher side anyway so it takes longer for them to go out of spec again.
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