John h Posted December 31, 2018 Report Share Posted December 31, 2018 (edited) Hi to all I have recently managed to get a engine for my project so I’m looking to sale this head that came with the car only it’s a bit pitted/rusty on the cylinder side and on the manifold side my question is how much can be skimmed off. Kind regards John and happy new year Edited March 17, 2020 by John h Quote Link to post Share on other sites
Motorsport Mickey Posted December 31, 2018 Report Share Posted December 31, 2018 (edited) Looks like a 4a head, valves out and bead blast the whole caboodle before anything else to expose cracks. Then measure using Terrianns TR head website with excellent info on it as to where to measure from so you can get an idea what's left and of course how aggressive you want to go with it. Here it is http://www.tr3a.info/FAQ_heads.htm The figure is 3.330 as standard (doesn't say from where) measure with Vernier from the head face and see which area is measurable and comes about that area, then measure from there. If it was a race head .170 off is not unusual and still useable but of course making a high compression unless the chambers are dug out to reduce it. Mick Richards Edited December 31, 2018 by Motorsport Mickey Quote Link to post Share on other sites
John h Posted January 1, 2019 Author Report Share Posted January 1, 2019 Hi mick thanks for your reply the more I look at the corrosion on the manifold face the more I think it’s too far gone will take it to a machine shop and get it assessed Quote Link to post Share on other sites
stuart Posted January 3, 2019 Report Share Posted January 3, 2019 Drop it in a barrel of molasses solution for a few weeks first you would be surprised at how it removes the rust. Stuart. Quote Link to post Share on other sites
mackev Posted April 11, 2019 Report Share Posted April 11, 2019 Hi There what was the outcome of the cylinder head, was it useable after all the bead blasting an a molasses solution ? Rgds K J Quote Link to post Share on other sites
John h Posted April 11, 2019 Author Report Share Posted April 11, 2019 Hi so I Took the head to a machine shop they said it was too far gone to just machine they recommended a engineering machine tooling workshop at Havant near Portsmouth called EMP tooling there they showed me round the workshop and the stuff they were doing there was amazing repairing cast iron blocks with holes in them and aluminium cylinder heads being drilled out re-bushed they also do something called laser welding which I’m told is very accurate they were on about cutting a section out of the head replacing it re-welding it in and then it could be machined the cost was approximately 450 - 500 pounds then the faces would have to be machined and prepared as normal so with regards to the cost for me as this is just a spare I think I will just wrap it in oily rag and put it on the shelf for later date if anyone has problems with broken parts that need welding don’t just throw it away because I think the welding technology has moved on so much in recent years he also told me that the welding they did doesn’t generate the heat so you don’t get The distortion that ordinary welding does .I’m sure these people aren’t the only ones that do this in the country so always worth Enquiring before it goes in the bin Kind regards John Quote Link to post Share on other sites
Geko Posted April 11, 2019 Report Share Posted April 11, 2019 On 1/4/2019 at 1:06 AM, stuart said: Drop it in a barrel of molasses solution for a few weeks first you would be surprised at how it removes the rust. Stuart. I have the head, the rust and the barrel, so what molasses would work best ???? Quote Link to post Share on other sites
stuart Posted April 12, 2019 Report Share Posted April 12, 2019 Anything like this would do https://www.ebay.co.uk/itm/NAF-Molasses-5l-To-Increase-Food-Palatability-Sugar-Cane-Molasses/282798469113?epid=1122797945&hash=item41d81a2ff9:g:YicAAOSwHYVaT6BC Stuart. Quote Link to post Share on other sites
Motorsport Mickey Posted April 12, 2019 Report Share Posted April 12, 2019 And to forestall the next question about 10 parts water to 1 Molasses seems to be the quoted mix. ie Stuarts recommendation would make up 50 litres which would cover a head. Check YouTube for application etc, there's an Australian guy in the outback who uses it bigtime. Mick Richards Quote Link to post Share on other sites
Hamish Posted April 12, 2019 Report Share Posted April 12, 2019 2 hours ago, Motorsport Mickey said: And to forestall the next question about 10 parts water to 1 Molasses seems to be the quoted mix. ie Stuarts recommendation would make up 50 litres which would cover a head. Check YouTube for application etc, there's an Australian guy in the outback who uses it bigtime. Mick Richards And 22 hours per pound ( 2 metric days per kg) at room temperature turning regularly Quote Link to post Share on other sites
Geko Posted April 12, 2019 Report Share Posted April 12, 2019 Found this on my fav online outlet. 6KG must be 5 litres so about right. Looking forward to the colonies of ants infesting my backyard Quote Link to post Share on other sites
stuart Posted April 12, 2019 Report Share Posted April 12, 2019 Thanks Mick I couldnt remember the mix quantities when I posted earlier. Stuart. Quote Link to post Share on other sites
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