Cylinder head question
If the bolts do break, it's usually the upper bolts. These aren't too bad to drill out even with the heads still on the engine, just need a steady hand and a 90* drill.
On the other hand, if you do need to have your current heads reworked, then spending $1000-1500 at a shop to have them do it wouldn't be that extreme, if you don't have the time/tools/space/skill level to attempt it yourself. Pulling the current heads (if needed) and dropping them off at a shop to get a quote on what is needed could save some money over the exchange heads price, but will require a bit of down time while they are reworked. Of course, it's always possible that your current heads would be more expensive to have done, in which case the ready to go heads would be a better value. It all comes down what condition your heads are in. It's even possible there is nothing wrong with them, in which case you could have wasted $650+ to replace them.....
An exhaust leak should have no bearing on how easy/hard it is to get the engine started. Diagnosing that will require much more info.....
1. upper exhaust bolts don't always break. I have broken many, but if the engine runs, getting the engine hot makes it a tone easier to get the bolts out.
2. So what if it breaks? drill straight through it, drill it larger, drill it a little larger. Get a bolt and nut. Yes, you will have to a little touch up with the die grinder to get a nut on two of the exhaust bolts.
3. where do you live? if you were in south georgia for instance and were able to drive your truck to my shop, I'd change the heads out with ya. (might cost you a case of beer). Actually in this for instance, we could just pull the offending head with broken bolt and fix it all right here (yes, I have a drill press and milling machine).
4. for the $650 heads, check what they have had done to them. Uneven surfaces, cheap or reused valves, exhaust valve seats/no seats, and a host of other things make the value of the heads.
good luck!
drew
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Various penetrating oils compared
Machinist's Workshop magazine actually tested penetrants for break out torque on rusted nuts. Significant results! They are below, as forwarded by an ex-student and professional machinist, Bud Baker.
*Don't forget the April 2007 "Machinist's Workshop" magazine comparison test.*
*They arranged a subjective test of all the popular penetrants with the control being the torque required to remove the nut from a "scientifically rusted" environment. *
Penetrating oil ....... Average load*
None ........................ 516 pounds
WD-40 ..................... 238 pounds
PB Blaster ............. 214 pounds
Liquid Wrench ..... 127 pounds
Kano Kroil .............106 pounds
ATF-Acetone mix..53 pounds
*The ATF-Acetone mix was a "home brew" mix of 50 - 50 automatic
transmission fluid and acetone.*
*Note the "home brew" was better than any commercial product in this one
particular test. Our local machinist group mixed up a batch and we all
now use it with equally good results. Note also that "Liquid Wrench" is
about as good as "Kroil" for about 20% of the price. *
*Your experience may vary, etc., etc.






