So long story short I loaned my car to someone to drive to work and they blew the headgasket, overheated my block and made the threads break from the block. So we retapped the block with the new size for the helicoils. We installed the helicoils and when we screwed the ARP studs into them, the coils didnt hold the studs at all. As soon as we started tqing down on the nuts, the studs just came right up out of the block. Finally getting frusterated with it we installed bolts, which seemed to hold. That lasted about a day, before the headgasket is either damaged again, or the head is loose, because the motor is back to boiling the coolant if you give it any gas at all.
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nah that would cost a fkload. Also I cannot take the motor out of the car. And I just looked up the time cert thing, and its the same exact **** as helicoils... Drill, tap, insert..
Not really, here(from time-serts site):
What are the specific advantages of TIME-SERT over Helicoil or coil style inserts?
TIME-SERT® is a thin wall, solid bushing, self locking insert with positive placement.
TIME-SERT® inserts are a thin wall solid bushing insert. This guarantees easy installation and allows for full load use of tapped hole, ensuring protection against stress and vibration.
TIME-SERT® inserts are "timed" internal to external which gives a very thin wall thickness which means TIME-SERTs can be installed in areas of limited space and clearance.
TIME-SERT® being a solid bushing insert gives it added strength, easily withstands high temperatures without damage or deforming. TIME-SERT® inserts have no prongs or tangs to break off or deal with down in the hole, which can be a problem in deep holes.
TIME-SERT® inserts are self-locking having an actual locking feature which will prevent them from coming out when a bolt is removed. On installation the bottom few internal threads of the insert are cold rolled to expand into the mating external threads of the base material locking the insert in place.
TIME-SERT® inserts have a flange, which will give them a positive placement on installation for “accurate specific depths”. This ensures that the insert does not wind down into the threaded hole.
Thin wall, self locking , solid bushing insert with positive placement .
Customers have asked if they may also use Loctite® adhesives for additional strength. Yes you may due to the solid wall design. There is no danger of loctite passing thru the threads of the insert and locking up the bolt as in coil types. Time-Sert inserts are used in Aluminum, cast iron, steels and even some hard plastics. MADE IN THE USA
Helicoils require precise drilling especially for such a deep thread on the block.
Many guys just use a hand drill, but afterwards, the new tapped thread is probably too loose to accept the new helicoil properly, and then pull out afterwards.
Many cases too, is that when the old threads are stripped, the surrounding aluminum is also severely fatigued/stressed. The next size up on the Helicoil drill size may not be enough to remove all the stressed material. So by cutting a new thread and inserting a Helicoil into fatigued/stressed aluminum, it will easily pull out the threads again.
So for stripped headbolts, transmission bell housing to block threads, engine mount threads, etc.. It's better to use a Timesert or similar thread insert.
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