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It's not recommended. Replace the gasket AND head bolts. A re-used gasket won't seal properly.
The head bolts are designed to stretch to to maintain torque settings.
So old ones are very likely to snap.
why did you need to change the head gasket in the first place ?
There may be a reason the gasket failed like a crack in the head or a warp in the head of the engine.
When you do a head job there is a problem with water getting into the head bolts holes in the block. Combined with gunk already in the hole when you insert the head studs and tension down all you are doing is causing a hydraulic in the hole under the stud and the correct pressure to seal the head gasket is not being achieved.. It is a requirement that when doing a head job the stud holes are cleaned out using a thread tap ( to remove rust and carbon build up) and the holes are blown out with compressed air to remove all water-oil and debris.. Most mechanics use a film of oil on the stud threads before installing them-- My preference is "never seize" as it allows the threads to move freely under tension and stops binding of the threads. Tension the head studs in the correct order of rotation to settle the head gasket in place starting at 20 ft/lbs and do each rotation in increased increments of 10 ft/lbs until the correct head tension is reached . Before fitting the head check the protrusion of each cylinder liner above the block to ensure that they are all within tolerance as if one is lower than the rest it will not allow proper seating of the head
To help you identify the starting problem, first, check for trouble codes (DTCs) using a good quality code reader. You should also do a battery load test to make sure your battery is ok. As far as replacing a head gasket is concerned, that is a major exercise requiring you to remove the offending head, pull the old gasket and replace it. There is no sealant that will fix a head gasket leak, and this is not something you should attempt without training.
The head gasket (in your case gaskets) is located on the top of the engine block under the engine cylinder head which is under the Camshaft cover which is the very top of the engine. This car is a V8 engine so it has 2 heads and 2 head gaskets, one on each side of the engine. It is a very expensive job to replace head gaskets.
to remove head gasket first take off the valve cover and locate head bolts .make sure one is not broken . then remove timming belt cover and set engine to top dead center by the mark on the crank pulleyengine drive belt will also need to be removed.loosen timming belt tension ,mark belt osision and slide belt from camshaft gear .sometimes its easier to remove the gear.disconect fuel lines ,exuat pipe from manifold ,and sensor wires ,sparkplug wires and any other vacum lines wires ,ect ....that are conected the the cylinder head. before removel disconnect battery and drain cooling system. remove the head bolts ,inside and work to the outside in a circle.may need to pry head from the engine block careful .reinspect to make sure all hoses and wire ,lines are not still attached..always seems to be one thing that will still be attached..after head is removed ,you should be able to see where the gasket is damaged. clean all mating surfaces off engine block and head toinspect for cracks and damage.make it extra clean....razor blade scraper, sand paper ,brakecleaner and lots of shop towels. that is the most important to have clean surface ...install new gasket and reinstall head bolts to the proper tourque specs. parts guy can tell you if you dont know. when the head bolts are tight, this is a good time to drain oil and filter and after repair is finished install new 50/50 coolant. good luck with your repair
Dear Sir,
For replace head gasket you no need to remove engine you can replace gasket there only but you have to remove cylinder head and do head facing and then put it back with new gasket thanks. yogesh
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