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How do I adjust the valves on a 2000 Mazda Protege DOHC? 1.6 engine.

Valves rattle..

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Http://workshop-manuals.com/mazda/protege_dx/l4-1.6l_dohc/maintenance/tune-up_and_engine_performance_checks/valve_clearance/system_information/specifications/page_666/ this shows how to do it but changing the shims is a job for a mechanic

Posted on Dec 29, 2016

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If timing belt breaks ,will it bend the valves


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1 Answer

2000 mazda protege correct timing mark alignment


Presuming the timing belt has not been removed or has skipped.
If the belt is removed or skipped this is an interference engine, valves and or pistons could be damaged by turning crankshaft, seek professional help.
Turn crankshaft clockwise and align timing marks (see jpg).
Face the marks (I) and (E) of the camshaft straight up, then align the timing marks with the horizontal surface on the cylinder head.
Pulley boss position pin on the crankshaft should be facing straight up.
25327211-bog4asmiohngydsbtkv4ivhw-1-0.jpg
This is only the beginning of an involved process, 3 pages in shop manual. I recommend getting a manual, many available on line. one typical Mazda 323 Protege Repair Manual 1990 2003
insure that the manual you get has info on your engine.

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1 Answer

How to adjust valve lash on a 1990 Geo Storm


its an Isuzu engine.
there are 3 engines.
4XE1, SOHC 1.6L (base)12valves
4XE1, DOHC , 1.6L same as above but now with 16valves.
4XE1, DOHC, 1.8L bends valves if belt snaps...
note the bad idea of ISUZU calling all 3 engine same name.
a horrid idea.
which one? the second was in USA and Canada only.
the second one was offered as the GSI. is yours that?

so I will attempt to guess for you, its the base engine.
(odds of coin toss)
toss #2, USA, SOHC
guess 3: did a new belt and want to do lash next. Cam belt>
No job stated so i guess 3 times.
Just lash.
SOHC 1.6L only (FSM book quote)
Check the valve lash between the rocker arm and valve stem on both the intake and exhaust valves on the number 1 cylinder, the intake valve(s) on the number 2 cylinder and the exhaust valve on the number 3 cylinder. If the valve lash on the intake valves is not 0.006 in. (0.15mm), adjust the valve lash. If the valve lash on the exhaust valve is not 0.010 in. (0.25mm), adjust the valve lash.

1.6L twin cam has shims.
1.8L has HLA , no lash to set.

HLA= Hydraulic Lash adjusters.

I posted this before, search for it. Im only doing 1 engine.

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1 Answer

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You need to take off the timing belt (or chain) cover and see why the one camshaft is not turning. Maybe the belt for that cam broke or the cam has seized from a bad cam bearing. One camshaft should be for the intake valves, the other cam is for the exhaust valves.

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1 Answer

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Sounds like a failing engine.
Assuming the engine is full of oil, could be a weak oil pump or worn bearings.

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1 Answer

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Try premium gas,your valves are rattling,sign of low octane starvation.

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Go the Auto part store and get a repair manual,it will show you how to adjust the valves.

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1 Answer

Why does engine rattle a lot


It is not the valves rattling but a case of detonation. Very bad for an engine as it will blow holes in the top of the pistons. Normally caused by incorrect octane rated fuel.--- ignition timing too far advanced hot spots in the combustion chambers --- not shifting gears soon enough. If you are running an e- mix fuel-- don't--have someone check the timing or have the fault codes read

PLEASE RATE THIS REPLY FOR ACCURACY

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1 Answer

I have a 2004 civic making loud rattling noise when i start it or step on gas


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