 So as I'm tearing down a couple more engines, I've got three or four more to go I've had a couple subscribers ask me some questions So I thought I'd shoot this little video a quick tip of the day and what to look for while you're Rebuilding your motor I've had a couple subscribers ask. Hey, I rebuilt my engine and I'm having overheating issues That's either backfiring or popping or white smoke coming out of the tailpipe turns out there's a couple things you need to look for while you're building and known fact that The heads can't warp if they get overheated Usually the surface can get warped But there's something new that I found I've never seen this before but Your jug keep an eye on your your jug your cylinder that the piston goes into because they can also warp also So I ran into a problem with one of the engines. I had rebuilt I rebuilt three of them now since my last video and One of them the head gasket leaked so I couldn't figure out what was going on first I thought it was a mechanical water pump seal leaking. So then I pulled the The oil drain plug And I let some oil out. I wanted to see if there was any coolant in the oil. It didn't see any It was burning a little white smoke. It wasn't too bad, but it started Popping and backfiring So I pulled the spark plug out the spark plug was dry But it was white. Let me see if I can show you here Yeah, I did clean it off since then but so it's got some white residue on the spark plug So that's a good indication that you're either burning really hot or You're getting coolant in your cylinder. Well, when I pulled the spark plug out It was actually dry, but it was it was a little on the white side So I kind of took a peek inside the spark plug hole and I saw a little bit of coolant Sitting on top of the piston it was barely enough to notice but enough to To mess something up on a long ride. So a couple of Couple things can cause that if you don't do the right torque sequence. You don't torque your head down right That will cause the head gasket to leak. Also what I found out was The jug can be warped also. So here let me Let me zoom you in here And I want to try to Show you what I found. This is The problem jug. Okay, so I wanted to know whether my head was warped or the actual jug Oh, like I told you before they're The heads are Known to wear. So here's my little test. I just set this over the top It'll rock back up for it. So if I put it on this jug There's a rock So I know the I know the heads good So it's it's the jug that I need to probably have checked out take the machine shop Also another another little trick you can do so I know the jug is shot So I'll take it to a machine shop But there is one another trick you can do there's some wear on here somebody had rebuilt this once before and And There was actually some burrs on here. So you can take a file Find any high edges or something just take a file. Just kind of get it down Actually found a burr on another engine because the guy rebuilt it and when he put the jug on The bottom of the jug had big gashes in it So that was telling me that that wasn't sealing properly So I just took a file and I filed the lip stone because he must have hit it on the case While I was trying to install the piston So you got to be careful of that too Watch what kind of a gasket soup by There's a lot of cheap ones out there on eBay Actually threw my other one away a good gasket Should have two layers and a nice Thick piece of metal in between there. I'll show you the one I bought So here's the one I bought that leaked. It's pretty flimsy. Look at that Nothing to it Only a really thin piece of metal in there Unfortunately this came with a piston kit that was actually a good name brand piston was a wise call But this flimsy gasket came with it This is the old one. I mean that's stiff. I'm flexing on it. It ain't doing much. That's what you want You can buy a Polaris brand Polaris name brand Head gasket for 47 bucks on eBay. So I would go that route. It's actually got the The proper edging on there. It's like a I don't know they put some kind of silicone on it or whatever Yeah, a couple things to keep in mind while you're building and you know same with The bottom of your head, you know, make sure that's all smooth and clean If you got any doubts or questions you bring it to a machine shop I take a straight edge and kind of go this way and this way across that and Like said, I've got a couple different jugs sitting here to match up with You probably won't have another jug laying around But you have any doubts. Like I said, take it to the machine shop you could try to San it down yourself with like 600 grit put on a flat surface and Try to smooth it out. I actually have a video of a two stroke. I did that too and it worked out fine It's an old-school trick. You know, I've been doing it for years on old cars And it's worked on a couple Polaris as I've done So once again, if you put your new motor in and it's popping backfiring like said check the spark plug Make sure there isn't a coolant going in there. Don't necessarily think it's the mechanical water pump seal all the time You know, if you built your engine right There's a little tiny weep hole at the bottom that the coolant would be coming out of if it was Mechanical water pump. I think but like I said, you could check your oil make sure there wasn't any coolant in there Like in my case I ran into it was just a minor leak that just slowly seeped into the piston and Every time I rubbed it up it would backfire and just a little bit of white smoke came out So what I decided to do is I I took everything apart. I tried retorquing it one more time Just to see if that would help it got a little better But I ended up taking it back apart and that's when I put the That's when I put the head over the jug and I saw it rocking back and forth So I hope this helps you out. Like I said Keep an eye on the gaskets. What kind of gasket you buy? Make sure you got clean surfaces Make sure your torque sequence is correct, you know, I have a video on how to torque a head down the proper way and that's per Polaris and So if you like the video hit the thumbs up and please subscribe to my channel I've got plenty of Polaris repairs on there anything from two strokes to four strokes, so Hope you enjoyed the video and like always till next time