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Exhaust making noise took it to mec.and he heli coiled it,lasted about a month..whats next a new ccast iron head or alunium again

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If the motor comes with an aluminium head as standard going down the cast iron head route may require a custom cast head unless someone already has them in stock but without knowing the motor make and model and year your best bet is aluminium head again

Posted on Jan 02, 2017

Testimonial: "it is a 2007 robins engine, they make a after market cast head but should I just put aluminum one back on ...?"


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Repair shop says spark plug was stripped, had to pull off the head of 2006 kawaski volcun 900. Shop says spark plug was sideways & all 4 valves are leaking, so needs a new head.

Not necessarily-- plug holes can be reclaimed by using a product called heli-coils . These are threads that when placed in a pre tapped hole ( stripped thread made oversize) and are of stainless steel and make the finished product the same as the original

valves can be ground again and seat inserts can be replaced or ground again to provide a new seat for the valves

Find your self an accredited engine reconditioning engineer shop and get a second opinion and a quote before you buy a new head

Aug 20, 2014 | Cars & Trucks

1 Answer

Rocker arms stripping breaking 2003 pontiac grand am v6

This would not be a head issue. If bolts are stripping and they are using heli coils, it is the block that has the issue unless these are manifold bolts for the exhaust.

Mar 13, 2014 | 2003 Pontiac Grand Am

1 Answer

Heli coil failure

Make sure the heli-coil is all the way in. If not you can probably take a big flathead screw driver and run it in a little farther. Then put plug back in and make sure it is seated good. If youre using a tapered seat plug you might want to try a plug with the metal washer on the seat. If you can't get the heli-coil screwed in any farther take it back where you got it repaired and he'll have the tool that came with the heli-coils to run it in farther. Hope this helps.

Jun 11, 2012 | 1991 Toyota Pickup

1 Answer

Two bolts are striped on 1983 280ZX, what size are head bolts to get right size heli coil and how hard is it to install heli coil in block ?

You should take the stripped bolts with you to purchase the new bolts at the auto store at the same time you buy the heli-coil inserts. While I could give you a possible size, (some are shorter, some longer in some engines) you have the exact part right there with you. Go ahead and take a good head bolt with you too.

The inserts are of brittle steel and must be installed carefully, but, this is done frequently for the same reason you need them without any problem.

There is also the option of tapping the damaged threads up to the next size, and using a different size head bolt, but you have to decide which is best based on your experience level and the availability of parts.

Mar 30, 2012 | 1983 Nissan 280ZX

1 Answer

I bought a 2000 lincoln ls about a month ago and after we bought it, it started having an over heating problem. Since then, we put new fan, new t-stat, new coils and valves, new radiator cap, new belts,...

I believe you have a head gasket or cylinder head problem (cracked head or blown head gasket).. If it is the gasket, the intake and cylinder head must be removed and a new gasket installed.. If it is the head itself, in addition to what have just said, you will have to have the head repaired or get a reconditoned or new one. This is a major repair.

Mar 25, 2011 | Lincoln LS Cars & Trucks

1 Answer

I have 2003 pontiac grandam my warranty company keeps replacing the rod that comes outta the head which is the number 1 3 4 5 and there rethreading it with a heli coli well it keeps blowin it apart so...

I replace the threads with a steel insert kit which is much stronger than heli coil, I have also used heli coil and never had a problem, I have repaired this problem many times if the re threading and insert are installed "properly" it shouldn't recurr.. if the same hole has been stripped several times the head definitely will need replaced. If they remove one head, make sure they remove both of them and replace both gaskets while in there, these engines are prone to head gasket failure

Mar 11, 2011 | 2003 Pontiac Grand Am

1 Answer

Some idiot so called mechanic has forced the wrong spark plugs into my car and cross threaded them...can i heli-coil all four? is this a good idea...and how can i get the cross threaded plugs out 3 are...

Likely, the plugs weren't cross threaded but I'll bet that anti-seize compound wasn't used. Plugs are not replaced as often as they once were and the dis-similar metals tend to corrode and bind so you end up tearing the threads out when you remove them. (doesn't matter now, result is the same). You can use heli-coils to do the repair...likely you can have them shipped if you buy them from an on-line source. Only problem is that you may not have enough room to actually do the install. As far as reliability, heli-coils will hold up indefinitely...Used them as routine on 7,000 hp fuel engines having very high cylinder pressures and never had one fail.
If you can get to them, you need to put a vacuum nozzle near the holes as you are drilling.(Removing them, they either will come out with the threads damaged or snap off....need to be drilled to accept the coil so that doesn't matter either) That should prevent most of the debris from entering the cylinders. Once drilled out and tapped, crank the engine over (ignition disabled) to blow any that did get in there out.
Other than removing / replacing the head, that's your only real option. And, of course, after making the repair, use anti seize compound so it dosen't happen again!!!
Good luck!!

Feb 28, 2011 | 1991 BMW 3 Series

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