Burning coolant

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AMDshaner
Posts: 32
Joined: Tue Aug 28, 2018 9:51 pm
Location: Btfd,ONT, Can

Burning coolant

#1 Post by AMDshaner » Thu Oct 25, 2018 8:27 pm

Hi all,

Got the zeel box installed and got the bike up and running. There is tons of white smoke and coolant coming out the exhaust pipes. Engine was fully rebuilt 5 yrs ago. I pulled the head off, the combustion chambers have coolant droplets all over.
I dont see any issues with the head gasket. Are there any problem points i should look at? Cracked cylinder head, cracked cylinder? Any other ways for coolant to get into the cylinders?

Thanks in advance for any help.

Shane
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justind97
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Location: Ottawa, Canada

Re: Burning coolant

#2 Post by justind97 » Fri Oct 26, 2018 9:56 am

Has there been any porting done? I would be checking the thin spots first and then looking for cracks elsewhere if you can't find anything.

A few drops on the tops of the pistons can be foreseen when pulling the head.

But most likely the headgasket.
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evan_calgary
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Re: Burning coolant

#3 Post by evan_calgary » Fri Oct 26, 2018 11:08 am

New head gasket and on you go. These motors are known to have random head gasket issues with sealing. Unless you had some major overheating or other reason to suspect cracked parts I would doubt that is the issue.
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Hooligan
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Joined: Mon Aug 20, 2012 1:37 am
Location: Calgary, Alberta

Re: Burning coolant

#4 Post by Hooligan » Fri Oct 26, 2018 2:39 pm

Head gasket.
'82 RD350LC in '81 colours, OEM pipes, UNI filters
'85 FZ750
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AMDshaner
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Joined: Tue Aug 28, 2018 9:51 pm
Location: Btfd,ONT, Can

Re: Burning coolant

#5 Post by AMDshaner » Fri Oct 26, 2018 3:01 pm

Ok i was leaning towards the head gasket. Will order one and try that.
Thanks again everyone..

Shane
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Evans Ward
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Re: Burning coolant

#6 Post by Evans Ward » Fri Oct 26, 2018 3:15 pm

^ Get the genuine Yamaha OEM HG
84 RZ350-Toomeys,SCR milled head, stk 26 carbs,300 M, 35 P, stock regrooved needles AS 2.5 turns out,stk air box,Banshee reeds Zeel non-progr CDI,TSRL Program YPVS,alum rad,R6 shock,GV emulators w/RT springs,fork brace,Shindy steering damper.
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silverstrom
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Re: Burning coolant

#7 Post by silverstrom » Fri Oct 26, 2018 3:57 pm

Evans Ward wrote:^ Get the genuine Yamaha OEM HG
Definitely...otherwise you'll be doing the job again.
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AMDshaner
Posts: 32
Joined: Tue Aug 28, 2018 9:51 pm
Location: Btfd,ONT, Can

Re: Burning coolant

#8 Post by AMDshaner » Fri Oct 26, 2018 5:03 pm

Yes i was gonna go with a yamaha part. Luckily my local yamaha dealer still has lots of rz stuff. Got a oem taillight assy still in the box and 2 carb rebuild kits. He has 2 NOS cdi boxes. Lots of little stuff..

Will check with them again. Thanks for the tips..

Shane
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kobra
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Re: Burning coolant

#9 Post by kobra » Fri Oct 26, 2018 6:47 pm

A thin layer of that Permatex spray-on copper gasket wouldn't hurt either, would it?
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RuZty
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Re: Burning coolant

#10 Post by RuZty » Fri Oct 26, 2018 7:01 pm

kobra wrote:A thin layer of that Permatex spray-on copper gasket wouldn't hurt either, would it?
Never used it and never had a problem with a new OEM head gasket.
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AMDshaner
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Joined: Tue Aug 28, 2018 9:51 pm
Location: Btfd,ONT, Can

Re: Burning coolant

#11 Post by AMDshaner » Sat Oct 27, 2018 2:00 pm

I ordered an oem yamaha head gasket. Should have it wednesday..
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