Engine Knocking?

[usfstud27]

I have a 1994 GS300 that I recently made a few repairs (New water pump, thermostat, timing belt, serpentine belt) to. After drivng it for about 20 miles, it has started making a knocking sound that sounds like a valve or lifter towards the back of the engine. Also, about a min after I shut the car off after driving for some time, It starts to make a boiling sound in the water system. Unfortunately, my temperature gauge on the dash does not work. It drives good and coolant does circulate trhrough the system while driving. Any ideas on what the problem could be? I did just put some sea foam in the crank case and water wetter in the radiator to see if it might help....prob not but I'm crossing my fingers. Will some of you DIY veterens please offer some ideas and solutions. Thanks-

[mburnickas]

I have a 1994 GS300 that I recently made a few repairs (New water pump, thermostat, timing belt, serpentine belt) to. After drivng it for about 20 miles, it has started making a knocking sound that sounds like a valve or lifter towards the back of the engine. Also, about a min after I shut the car off after driving for some time, It starts to make a boiling sound in the water system. Unfortunately, my temperature gauge on the dash does not work. It drives good and coolant does circulate trhrough the system while driving. Any ideas on what the problem could be? I did just put some sea foam in the crank case and water wetter in the radiator to see if it might help....prob not but I'm crossing my fingers. Will some of you DIY veterens please offer some ideas and solutions. Thanks-

Was the TB installed correctly?

[usfstud27]

I have a 1994 GS300 that I recently made a few repairs (New water pump, thermostat, timing belt, serpentine belt) to. After drivng it for about 20 miles, it has started making a knocking sound that sounds like a valve or lifter towards the back of the engine. Also, about a min after I shut the car off after driving for some time, It starts to make a boiling sound in the water system. Unfortunately, my temperature gauge on the dash does not work. It drives good and coolant does circulate trhrough the system while driving. Any ideas on what the problem could be? I did just put some sea foam in the crank case and water wetter in the radiator to see if it might help....prob not but I'm crossing my fingers. Will some of you DIY veterens please offer some ideas and solutions. Thanks-

Was the TB installed correctly?

My dad and I did the belt ourselves but did put all the pulleys at TDC so I am pretty sure.... Can being off by one tooth or so cause that much difference? If so, how can I change the timing and make sure it is absolutely perfect?

[usfstud27]

we have come to the conclusion that the sound is a sticky valve or valve lash. What could be the cause of this? How can I adjuct the valves?

[mburnickas]

I know you want an answer but it is the holidays and do not think 7 threads helps. Just put them, BTTT. It is slow around here at times.

You have like 7 threads on this you know?

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http://us.lexusownersclub.com/forums/index...ic=43550&hl=

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http://us.lexusownersclub.com/forums/index...amp;qpid=277982

http://us.lexusownersclub.com/forums/index...mp;#entry278753