Scott Posted August 27, 2011 Share Posted August 27, 2011 What's the deal with removing the crap on the face of the block from where the headgasket was? I was pointed towards some spray on Ebay that should dissolve it but I'm worried about it getting into the coolant, does it just evaporate or should I be looking to something else? Also, given that there is crap on there should I be using gasket paste/sealer or something like that? The manual doesn't mention it but I'm wondering where the gunky stuff on there has came from. Quote Link to comment Share on other sites More sharing options...
jonc Posted August 27, 2011 Share Posted August 27, 2011 I have used petrol and/or acetone before to clean the cylinder heads. I Soak the area and leave for a couple of minutes and then given it a light scrape with a decent engineering scrapper. It normally takes me a good couple of times to get rid of it all and then I polish the cleaned surface with very fine (1200-2000) wet and dry. The good thing with petrol and acetone is that it evaporates, just don't smoke and use safety equpiment to protect your hands and eyes. I have never used any sealers on cylinder heads! just block, head gasket and cylinder head torqued down correctly. The combustion process over years will cause a build up of carbon (which is V hard) but surely gunk will only come from an oil breakdown in the past or water mixing with the oil at some point. People on here probably have other ideas as well Quote Link to comment Share on other sites More sharing options...
Scott Posted August 27, 2011 Author Share Posted August 27, 2011 I have used petrol and/or acetone before to clean the cylinder heads. I Soak the area and leave for a couple of minutes and then given it a light scrape with a decent engineering scrapper. It normally takes me a good couple of times to get rid of it all and then I polish the cleaned surface with very fine (1200-2000) wet and dry. The good thing with petrol and acetone is that it evaporates, just don't smoke and use safety equpiment to protect your hands and eyes. I have never used any sealers on cylinder heads! just block, head gasket and cylinder head torqued down correctly. The combustion process over years will cause a build up of carbon (which is V hard) but surely gunk will only come from an oil breakdown in the past or water mixing with the oil at some point. People on here probably have other ideas as well The cylinderhead is spotless so I don't need to worry about that. My real issue is with stuff falling into the coolant holes. It would appear that no matter which method I use I will risk crap falling into them Quote Link to comment Share on other sites More sharing options...
Scott Posted August 27, 2011 Author Share Posted August 27, 2011 Just zoomed in... Quote Link to comment Share on other sites More sharing options...
Hellstrom Posted August 27, 2011 Share Posted August 27, 2011 what you could do is take a bit of a rag and put down in every single hole and clean it and then gently take a way the rags when you are done. Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted August 27, 2011 Share Posted August 27, 2011 Mate, gotta love a JZ engine. Look at those bores, spotless Quote Link to comment Share on other sites More sharing options...
Scott Posted August 27, 2011 Author Share Posted August 27, 2011 what you could do is take a bit of a rag and put down in every single hole and clean it and then gently take a way the rags when you are done. I don't think I have that many rags lol. Quote Link to comment Share on other sites More sharing options...
Scott Posted August 27, 2011 Author Share Posted August 27, 2011 Mate, gotta love a JZ engine. Look at those bores, spotless I know bud, I was absolutely amazed. I haven't even touched anything yet, as I want to get the top face cleaned first Quote Link to comment Share on other sites More sharing options...
jonc Posted August 27, 2011 Share Posted August 27, 2011 Sorry mate, I mis understood what you meant. I normally use rags as Hellstrom said but I suppose you could use some form of foil tape and cut it to shape around each water way. I've used this stuff before http://www.tapes-direct.co.uk/index.php?main_page=index&cPath=215&zenid=p0uh7d4mhp3vef77mpjkjhqpg1 not for this reason but it may work. Mate, gotta love a JZ engine. Look at those bores, spotless I've got to agree with Swampy thats a fantastic looking block Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted August 27, 2011 Share Posted August 27, 2011 Waterways are not SUCH a problem Scott, but keep any dirt out of the bores and any oil ways. Cellulose thinners, Scotch Brite pads and scrapers are what you need. It's obviously a LOT easier with a bare block on a stand, but patience will prevail in the end. Quote Link to comment Share on other sites More sharing options...
Scott Posted August 28, 2011 Author Share Posted August 28, 2011 Thanks guys. I'll give that solvent stuff a go to see what happens with it. Will just need to be careful not to drop crap in. Cheers Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted August 28, 2011 Share Posted August 28, 2011 If you buy a new chisel sharpening stone with a coarse and fine side, so you know it's flat, you can lightly go over the block face with it, using a bit of soapy water, or oil as a lubricant, it will take off any high spots of rust, or where any bolt holes have tint lips. You can do the head with it, too, but don't go mad. Thanks for all the maths help Scott, you were a Godsend, and its much appreciated Quote Link to comment Share on other sites More sharing options...
Scott Posted August 28, 2011 Author Share Posted August 28, 2011 (edited) I think i still have an indian stone somewhere so ill have a look for it. No worries Chris, youre always helping out so it was nice to be able to return the favour Edited August 28, 2011 by Scott (see edit history) Quote Link to comment Share on other sites More sharing options...
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