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Topic: 2-9 Dilemma Head Bolts! (Read 3401 times) |
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ro284
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2-9 Dilemma Head Bolts!
« on: Aug 8th, 2013, 9:46am » |
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Right, having diagnosed the Head gaskets failure, i have got a new gasket set and Heads skimmed, i now have to replace the 16 Torx type Head bolts, as these are apparently not re-usable, i have found some in Germany, Via Ford, These only come in packs of 5, so i need 4 boxes of 5! To get 16! Cost £132. Plus shipping i guess! All suggestions welcome please, One question is- has anyone re-used the original bolts? What results am i likely to get if i did re-use them? Perhaps to a lower torque setting! And re tighten after running, Bob
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Bob Dorset
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Matt
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Re: 2-9 Dilemma Head Bolts!
« Reply #1 on: Aug 8th, 2013, 10:08am » |
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That seems excessive Try burton power or bga gaskets. You can resuse the 2 smaller alan ket bolts at the very front but the msin bolts ive always replaced
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ro284
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Re: 2-9 Dilemma Head Bolts!
« Reply #2 on: Aug 8th, 2013, 10:29am » |
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Thanks Matt, Burton do have them in stock, Still 100 quid +, So its down to me to decide if it is viable, and worth doing really, Id be gratefull for any thoughts on these bolts, would i be right in thinking the reason they are not re-usable is that once used the are stretched, and to re-use them to the original torqe setting, would result in them then being over tightened! then when the engine heats up, something may crack! i have not come across Torxe head bolts before, on Mk 2 engines for instance, i am now thinking about steel washers, Bob
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Re: 2-9 Dilemma Head Bolts!
« Reply #3 on: Aug 8th, 2013, 10:45am » |
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Ive still got the box from bga with their part number on. They are the same bolts used on the granada boa 24v
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ro284
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Re: 2-9 Dilemma Head Bolts!
« Reply #4 on: Aug 8th, 2013, 10:55am » |
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Thanks again, i just sent an email to bga, before your reply, and will see what they come back with, i can understand these bolts being required for alloy heads and engines, but not so much for cast iron! cheers,
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Re: 2-9 Dilemma Head Bolts!
« Reply #5 on: Aug 8th, 2013, 11:41am » |
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I seem to recall the head bolts on the 2.8 were re-useable - I have certainly used them again after replacing head gaskets without any problems. Why is the 2.9 any different ? Sounds to me like a plan to sell some expensive bolts ! 24v has alloy heads, 12v has CI heads - but a vast difference in the HG set price ( £150+ v about £30 or so ? ) so I would be tempted to re-use them.
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ro284
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Re: 2-9 Dilemma Head Bolts!
« Reply #6 on: Aug 8th, 2013, 12:47pm » |
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Thanks Mike, I am also going to re-use the original bolts, like i have also used on 2-8s, I have wondered about the reasons ford use these bolts on the C I heads, And wonder if it might be something to do with the fact that they are essential for alloy cosworth heads, So perhaps Ford are erring on the cautious side, referring to all 2-9 engines, and issued like a blanket use of these bolts to minimise any possible damage being done to a cosworth engine by someone using any other type of wrong bolt! I’m not prepared to spend any more on the car, if it works i get a tremendous multipurpose (18 year old) estate car back, if not it’s the mondeo route, Thanks for replies guys Bob
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Re: 2-9 Dilemma Head Bolts!
« Reply #7 on: Aug 8th, 2013, 5:05pm » |
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BGA code is BK5324
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ro284
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Re: 2-9 Dilemma Head Bolts!
« Reply #9 on: Aug 8th, 2013, 8:53pm » |
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Thanks guys, but i fitted both heads today, re-used original bolts, so will report any problems when i get it running, in a few days, Bob
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Re: 2-9 Dilemma Head Bolts!
« Reply #10 on: Aug 8th, 2013, 10:40pm » |
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The new head gasket WILL fail if you've reused the head bolts. It's not an "if" but a "when". What did you use to set the bolts - a torque wrench or an angle gauge?
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rixivee
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Re: 2-9 Dilemma Head Bolts!
« Reply #11 on: Aug 9th, 2013, 3:40pm » |
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Hey, you really shouldn't reuse them. You risk blowing the head gasket and/or head. I'm not sure how much 2.9 can tolerate but DOHC will eventually build up some problems if bolts are reused. The basic guideline is to always replace head bolts with at least aluminum cylinder heads. It doesn't apply just to Ford engines.
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Re: 2-9 Dilemma Head Bolts!
« Reply #12 on: Aug 9th, 2013, 10:30pm » |
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Some Job's comforters popping up here I think it would be fairly safe to say that your new gaskets are safe under used bolts,these engines are very low stressed and not subject to the stresses of aluminium lumps.Ford would advise new bolts to be on the safe side,but in the past I have reused headbolts on cast iron engines on several occasions without a problem,after all the old iron engines almost without exception,used studs over which the heads fitted,never was advice given to replace the studs unless in the case of a bad thread. Don't lose sleep over it Bob
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Re: 2-9 Dilemma Head Bolts!
« Reply #13 on: Aug 12th, 2013, 6:20pm » |
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Oh, don't get me wrong, I certainly wouldn't be taking the heads off again now the jobs been done. You might get another 5k miles out of it - maybe 10k, even 20k. And the failure mode for stretched bolts is just the head lifting slightly - it's not catastrophic. Just make sure your breakdown membership is up to date.
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ro284
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Re: 2-9 Dilemma Head Bolts!
« Reply #14 on: Aug 23rd, 2013, 8:57pm » |
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Just thought i would update this thread, Thanks for advice. I finished re-building the engine over a week ago, but this being a 95 model, the dreaded Arnitel wiring problem raised it's ugly head again! i have previously rewired the main engine bay loom, But the Engine loom itself, was also in a very poor state, if you have to move any wire more than once, the insulation falls off, and some wires were probably shorting before i even started the strip down, so it will be a few more days before i can even start the engine, as i am re routing all wiring (apart from injectors) away from in between the heads! as a matter of interest, pistons 1 and 2 were leaking into each other via the coolant holes, which may explain the same compression readings on those 2 pots! also the second push rod (left hand from the front) was caked up a bit where the gasket had failed and also leaked into the space under the inlet manifold! Bob
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Re: 2-9 Dilemma Head Bolts!
« Reply #15 on: Aug 30th, 2013, 4:34pm » |
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All done, the Gasket was the problem, plus the wiring loom, especially the injectors, but i have rewired everything, from the Main plug, Now i am ready to put in some Summer coolant, can anyone recomend any particular make. or mixture please, Thanks Bob
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Re: 2-9 Dilemma Head Bolts!
« Reply #16 on: Aug 31st, 2013, 8:25am » |
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read THIS it specifies 40% mixture and gives specifications
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ro284
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Re: 2-9 Dilemma Head Bolts!
« Reply #17 on: Sep 11th, 2013, 4:44pm » |
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Thanks guys, I have been driving the car, i remember the car running hot, and since the rebuild, i feel it is still getting too hot, the first thing i have done is take the stat out, but it is still too hot, i checked all compression figures today, they are fine, (all in the 12's) the coolant tank gets pretty hot as well as the engine, i dont want to risk damaging that, So i think the first suspect is the rad, i did back flush that in place, but i notice it is extremely hot at the top as is the fan shroud. i think the fan sensor wiring is also suspect, so will rewire that as well, After realising the steel cooling pipes are connected (autobox) is it difficult to get the rad out? Any advice please, Bob
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Re: 2-9 Dilemma Head Bolts!
« Reply #18 on: Sep 11th, 2013, 4:50pm » |
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Bob, This may provide your answer.
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ro284
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Re: 2-9 Dilemma Head Bolts!
« Reply #19 on: Sep 11th, 2013, 5:10pm » |
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Many thanks SIMMO, Got a feeling the fans are not running properly either! i will have rewired the whole car by the time i get it reliable again! Bob
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