You are here:

Toyota Repair/low power 2.4L 2rz motor on LPG

Advertisement

Expert: Ted Ritter - 6/28/2009


Question
I have a 91' toyota hiace 2rz on LPG, it has lost heaps of power over the last
20,ooo ks, compressions are all around 145-150 psi. The valve clearances are
all very low (.004"-.008")or undetectible on 2 exhaust valves (tested cold), could
this be keeping the valves open a little and reducing engine power?? what
should I do???

Answer
Those two valves are the problem, there should be valve clearance of about 0.08" for the intake and about 0.11" for the exhaust, zero clearance indicates that the valves may be worn, the valves can be adjusted to the proper clearance so I would recommend doing so first.

Toyota Repair

All Answers

Answers by Expert:

Ask Experts

Volunteer

Ted Ritter

Expertise

I have more than 28 years experience as toyota technician, I will be able to answer most questions related to the Toyota product line up to the present year models,I am located in the US but welcome questions from other regions of the world. When asking a question please provide specific information: year,model, engine,transmission information. Provide as much information as possible including a brief repair history if possible. I have been a volunteer here for almost ten years an have answered over 16,000 questions helping Toyota owners with their problems without any compensation, some of my answers are published on many other websites via google and other search engines. AllExperts recently added a new feature which allows questioners to donate to experts on the site, any amount of donation is very much appreciated, to make a donation just click on the DONATE button.

Experience

Toyota technician since 1979,expert in electrical systems,OBD systems,engine repair, driveability problems,EFI systems,ASE certified,Toyota master technician.
Certified Hybrid Vehicle technician.

Education/Credentials
Toyota master technician, ASE certified in eight catagories, Hybrid vehicle certified. Toyota technical training: Engine Automatic transmission Manual transmission Drivetrain Electrical systems Brakes and chassis Air conditioning Engine performance and diagnostics Hybrid systems

©2012 About.com, a part of The New York Times Company. All rights reserved.