Sparky-(Admin) 19,546 #1 Posted October 2, 2017 So now that my broken head-bolt issue is behind me it’s time to install the new head gasket. I’ve done this before but it’s been like 4 years since my last head gasket install. What’s the proper foot pounds or inch pounds of torque? My torque wrench is in inch pounds. What’s the popular consensus on using any sort of gasket goo? Yes/No? If yes what type or brand is best. The motor in question is a K321 on my C-145. Thanks guys! Share this post Link to post Share on other sites
AMC RULES 36,945 #2 Posted October 2, 2017 http://gardentractorpullingtips.com/cylhead.htm#headboltorque 4 Share this post Link to post Share on other sites
Sparky-(Admin) 19,546 #3 Posted October 2, 2017 Thanks Craig....loads of great info there! 1 Share this post Link to post Share on other sites
953 nut 51,682 #4 Posted October 2, 2017 In addition to what Craig posted, I have always hot torqued the head bolts after the engine has been operated and is at operating temperature. 3 Share this post Link to post Share on other sites
Fordiesel69 214 #5 Posted October 2, 2017 Brian miller mentioned cleaning and re-using the old head gasket and simply spraying it with silver spray paint. I like this idea as the few new head gasket I have used seem to shrink after many hours and require retorquing. Gets really annoying. If you clean them spotless, and the engine does not burn oil, I have not had one leak. I have had them leak on oil burners as I think the oil is not compressible. I retired a Kohler M14 that used 1 qt per hour. 1 Share this post Link to post Share on other sites
WHX?? 46,774 #6 Posted October 2, 2017 I always went by just what is in the Kohler manual and that has always worked for me. I would guess you have this one Sparkeye but just in case Kohler K-Series SM TP-2379 LR.pdf Share this post Link to post Share on other sites
pacer 3,159 #7 Posted October 2, 2017 Some years back I was in a bind trying to get an engine re-assembled and not having a new gasket I decided to use the old one - it looked perfectly good! So after that engine ran like it didnt care whether it had a new gasket or not, I have since often used the old one when its not convenient to wait on a new one - never had any problems (so far!) 2 Share this post Link to post Share on other sites
BOB ELLISON 2,976 #8 Posted October 2, 2017 I do reuse the old gasket if it looks good. I also spray it with permatex-copper-spray and I have never had any trouble yet. https://www.permatex.com/products/gasketing/gasket-sealants/permatex-copper-spray-a-gasket-hi-temp-sealant/ Share this post Link to post Share on other sites
Shynon 7,435 #9 Posted October 2, 2017 I personally would not reuse the head gasket. I decarbon, sand head flat torque to specs run up to temp then let cool and then retorque head. 3 2 Share this post Link to post Share on other sites
tunahead72 2,341 #10 Posted October 2, 2017 @Sparky -- This may be useful. It's my go-to reference any time I have to replace one of these things: http://www.mgonitzke.net/cubcadet/tools/headgasket.pdf 1 3 Share this post Link to post Share on other sites
Sparky-(Admin) 19,546 #11 Posted October 2, 2017 27 minutes ago, tunahead72 said: @Sparky -- This may be useful. It's my go-to reference any time I have to replace one of these things: http://www.mgonitzke.net/cubcadet/tools/headgasket.pdf Another good read. Your link never mentioned using any type of gasket sealer...Craig’s link recommended it. As usual, confusing 😁. Thanks! Share this post Link to post Share on other sites
fast88pu 3,313 #12 Posted October 3, 2017 I use no gasket sealant even with copper head gaskets. Share this post Link to post Share on other sites
Retired Wrencher 4,876 #13 Posted October 3, 2017 (edited) GEEESSS Mike all ever did was clean them up do a little sanding on the block and put the gasket on. But I always flat sanded the head on a flat steel bench with some 120 to 150 sand paper. I was told they do not make the reusable ones any more. That is why the fiber ones are available now and they are throw away`s. Then just torque them down. I never used any glue or adhesive because I tore some apart that where from the factory they did not put glue on there's. see you at Zag`s this weekend. Looks like no rain? Edited October 3, 2017 by Retierd Wrencher 2 Share this post Link to post Share on other sites
pfrederi 17,147 #14 Posted October 3, 2017 Interesting discussion. The methods and reuse or not of gaskets seems to be all over the map. Since no one has reported significant failures i guess that means it doesn't make much difference what you use/do.... To add my $.02 i sometimes reuse and do use copper spray..just because i have it. 1 Share this post Link to post Share on other sites
Fordiesel69 214 #15 Posted October 3, 2017 These are not aviation engines. A visual inspection every so often will tell if the gasket is leaking, and that way you can address it. It is such a quick job, no biggie if they leak several year after reusing them. I do however agree with resurfacing the head flat again. Very interesting article. On the flipside, if access to the head / gasket is difficult such as a motorcycle, it would be wise to replace. 1 Share this post Link to post Share on other sites
ericj 1,576 #16 Posted October 4, 2017 6 hours ago, Fordiesel69 said: On the flipside, if access to the head / gasket is difficult such as a motorcycle, it would be wise to replace. onan back head eric j 2 Share this post Link to post Share on other sites
Sparky-(Admin) 19,546 #17 Posted October 15, 2017 So it’s been awhile. Let the carb body soak for a week and rebuilt it. Then it was head gasket time, bought and used the copper spray stuff. Not sure if it needed it or not but it couldn’t hurt right? I sanded the points, kinda wish I ordered new ones as it has a little hiccup or a skip at hi rpms. Or maybe it needs a bit more carb adjustment. A38C1E81-CAD2-4450-B08A-FFAF284F6F58.MOV 1 Share this post Link to post Share on other sites
AMC RULES 36,945 #18 Posted October 15, 2017 Agreed, that little stumble does sound like it's in the points. 1 Share this post Link to post Share on other sites
gwest_ca-(File Mod) 10,498 #19 Posted October 15, 2017 Try a little Marvel Mistery oil in the fuel. The valve springs may be having trouble keeping up to the high rpm's. My go to head gasket sealer is Never Seize. Hasn't let me down yet and some of them should never have been reused but all I had at the time. Garry 1 Share this post Link to post Share on other sites
Sparky-(Admin) 19,546 #20 Posted October 15, 2017 19 minutes ago, gwest_ca said: Try a little Marvel Mistery oil in the fuel. The valve springs may be having trouble keeping up to the high rpm's. My go to head gasket sealer is Never Seize. Hasn't let me down yet and some of them should never have been reused but all I had at the time. Garry @gwest_ca What's the best ratio of Marvel to gas? Share this post Link to post Share on other sites
gwest_ca-(File Mod) 10,498 #21 Posted October 15, 2017 Our bottles are metric so did so digging. They recommend 4 oz. to 10 gallons which would be US gallons. Converted to metric I use slightly less and it does the trick. If I don't use it the skip is back before the next tank of fuel is used up on a C-120. Garry Share this post Link to post Share on other sites
Sparky-(Admin) 19,546 #22 Posted October 15, 2017 25 minutes ago, gwest_ca said: Our bottles are metric so did so digging. They recommend 4 oz. to 10 gallons which would be US gallons. Converted to metric I use slightly less and it does the trick. If I don't use it the skip is back before the next tank of fuel is used up on a C-120. Garry Thanks!! Share this post Link to post Share on other sites
Sparky-(Admin) 19,546 #23 Posted October 15, 2017 One more tidbit of info....ran the tractor for over an hour and let it cool off, checked the head bolts and EVERY one of em needed to be re-torqued. 1 Share this post Link to post Share on other sites
953 nut 51,682 #24 Posted October 16, 2017 On 10/2/2017 at 8:07 AM, 953 nut said: In addition to what Craig posted, I have always hot torqued the head bolts after the engine has been operated and is at operating temperature. 2 hours ago, Sparky said: One more tidbit of info....ran the tractor for over an hour and let it cool off, checked the head bolts and EVERY one of em needed to be re-torqued. Share this post Link to post Share on other sites
WHX?? 46,774 #25 Posted October 16, 2017 Did you use the copper spray gasket then Sparkeye? I noticed some recent exhaust side leakage on a freshed up 10 hp of mine and just wondering if I should try it or just learn how & have the patienceto glass a head. I've got the same hiccup on a 1257 but it goes away with a little fine tweaking of the hi speed adjust screw or when under load. Probably has original points in it so new ones are not the worst idea either. 1 Share this post Link to post Share on other sites