Steve AKA vitessesteve Posted October 26, 2016 Share Posted October 26, 2016 I have been breaking down an old GT6 engine of unknown history that I have had as a spare.After taking the rocker gear off I noticed that a couple of push rods were bent. The crankshaft does turn. I have got all but two of head studs out but the head shows no sign of coming off. I have flooded the stud holes and around the edge of the head etc with releasing agent.I have hit the head with a rubber hammer. Any suggestions as to how to get it off gratefully received. Quote Link to comment Share on other sites More sharing options...
Clive Posted October 26, 2016 Share Posted October 26, 2016 You will need to get those studs out. May not be easy either, if the double nut technique fails then a stud extractor or weld a nut on.I have used a block of hardwood (about a foot long, sort of 4x2 ish size) and a big club hammer. That usually does it. The blows should be aimed upwards as much as possible.......... Quote Link to comment Share on other sites More sharing options...
yorkshire_spam Posted October 26, 2016 Share Posted October 26, 2016 On the spitfire engine I welded nuts onto the stuck studs in order to extract the studs (as Clive suggests above) - then replaced the full set with ARP studs. Not pretty, but it worked. Quote Link to comment Share on other sites More sharing options...
Nick Jones Posted October 26, 2016 Share Posted October 26, 2016 Agree that the studs need to come out. I imagine they are on the manifold side on near exhaust ports as these are usually the problem ones. I have a very similar story with a spare engine I had where I ended up welding nuts on two recalcitrant studs. One came out, the other snapped off flush with the surface.......... which was a bad thing. In the end I managed to break the gasket bond and unscrew the stud from the block by rotating the whole head around it. Once off I propped the head on block of wood and beat the stud through with a drift.Good luck.....Nick Quote Link to comment Share on other sites More sharing options...
timireson Posted October 26, 2016 Share Posted October 26, 2016 I needed a jack between the engine mount and the echaust bolts with a thick piece of wood, 5 hours and then it went pop.t. Quote Link to comment Share on other sites More sharing options...
Saltddirk Posted October 27, 2016 Share Posted October 27, 2016 I have heard, not tested though, of similar situation where they just had the complete engine strung from a block and left hanging overnight. By morning the 2 had separated. No need to get it 6 feet up in the air too, an inch or so will do.Other than that I can only offer advise to hit the head sideways if the studs are out and nothing preventing it moving sideways. You easier break a bond by trying to shift the components inducing a shear force than pulling them apart.Dirk Quote Link to comment Share on other sites More sharing options...
RobPearce Posted October 27, 2016 Share Posted October 27, 2016 I heard of a case where a garage were trying to remove the heads from a Stag, and after removing all the bolts & studs, they hung the whole car from the head overnight... and it still didn't budge! However, that's an apocryphal Stag story, not a real world GT6. Quote Link to comment Share on other sites More sharing options...
RedRooster Posted October 27, 2016 Share Posted October 27, 2016 Rope down the spark plugs, then turn the engine over usually gets the head to pop off. Quote Link to comment Share on other sites More sharing options...
Steve AKA vitessesteve Posted October 27, 2016 Author Share Posted October 27, 2016 Thanks for the input to date chaps. Continuing with the battle to remove the head I now have another stud out 🙂 but in doing so have jammed my extractor 🙁. Think I need a cuppa and a new strategy. Quote Link to comment Share on other sites More sharing options...
Steve AKA vitessesteve Posted October 27, 2016 Author Share Posted October 27, 2016 Refreshed with tea and cake I was able to unjam the tool - then extract the last stud BUT the head is still stuck. Next time I will try Red Roosters suggestion. Quote Link to comment Share on other sites More sharing options...
Davemate Posted October 27, 2016 Share Posted October 27, 2016 Just leave it on,you can drop the Pistons out the bottom ???? Quote Link to comment Share on other sites More sharing options...
Clive Posted October 27, 2016 Share Posted October 27, 2016 I would hesitate to use rope or anything else down the bores. Ifthe head doesn't come away, you could bend the rods' Big hammers are the answer (with a block of wood) Quote Link to comment Share on other sites More sharing options...
Don Cook Posted October 27, 2016 Share Posted October 27, 2016 When my head was still on the car I jacked the car up using the manifold and a block of wood, thankfully the seal went bang not the manifold. Quote Link to comment Share on other sites More sharing options...
RedRooster Posted October 28, 2016 Share Posted October 28, 2016 Your stud extractor is easy, just knock 1/2'' extender out. Quote Link to comment Share on other sites More sharing options...
Sheepy Posted October 28, 2016 Share Posted October 28, 2016 Quoted from RedRooster Your stud extractor is easy, just knock 1/2'' extender out. I have the same (sykes pickavant) stud extractor, and it often gets stuck on the stud like that.Knocking out the extension does nothing, the black bit is fixed into the chrome bit so that it swivels, so when you turn it onto the stud it grips and then you can remove the stud (unless it breaks)The way I free it off, is to put the stud in a vice, and turn the extractor the opposite direction to unlock it. Quote Link to comment Share on other sites More sharing options...
Nick Jones Posted October 28, 2016 Share Posted October 28, 2016 Bloody Wellseal has a lot to answer for........ 🙁 (I've been doing alot of gasket scraping recently)Nick Quote Link to comment Share on other sites More sharing options...
Toledo Man Posted October 28, 2016 Share Posted October 28, 2016 If all the studs are out then you can use Dirk's suggestion. Superglue works on the same principle so some sideways force should do the trick. When I had to remove the head on an Acclaim, I left the exhaust manifold on and used a trolley jack on the manifold and the head came off. Quote Link to comment Share on other sites More sharing options...
Steve AKA vitessesteve Posted October 28, 2016 Author Share Posted October 28, 2016 Quoted from Sheepy I have the same (sykes pickavant) stud extractor, and it often gets stuck on the stud like that.Knocking out the extension does nothing, the black bit is fixed into the chrome bit so that it swivels, so when you turn it onto the stud it grips and then you can remove the stud (unless it breaks)The way I free it off, is to put the stud in a vice, and turn the extractor the opposite direction to unlock it. Yes exactly what I did - the black bit had griped the stud so very hard that my work bench (on which the vice is fixed) started to move. Will have to look at fixing the bench to the wall or floor.... Will try putting the exhaust manifold back and leave a jack pushing up on the manifold - hopefully when I get back after the weekend the head will have freed itself. Quote Link to comment Share on other sites More sharing options...
yorkshire_spam Posted October 28, 2016 Share Posted October 28, 2016 I use these to get rid or gasket:http://www.screwfix.com/p/surf.....-3_c8CFQaVGwod254DHg Quote Link to comment Share on other sites More sharing options...
dazzer Posted October 28, 2016 Share Posted October 28, 2016 Find something solid a strong arm or a scaffold bar place gently against the side of the head then belt the bugger with a big hammer, metal to metal works better than wood. Or make sure all the valves are fully closed fill the bores with oil, spark pugs in and wang it over with a windy gun or even a hefty fast lever on a strong arm. Failing that place a small pea sized piece of C4 in each plug hole insert fuse, make sure the wife and kids are out, the cats a few gardens away and your house insurance is up to date. Quote Link to comment Share on other sites More sharing options...
JohnD Posted October 29, 2016 Share Posted October 29, 2016 What?!WaitEngage GSoH mode! Nice one, dazzer. I don't have to post my bent conrod pic, again!only Quote Link to comment Share on other sites More sharing options...
Richard B Posted October 31, 2016 Share Posted October 31, 2016 As all the studs are now out I would go for a big block of wood and a very big hammer. Quote Link to comment Share on other sites More sharing options...
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