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yard cruiser smokes sometimes

#1

Y

yellowbeard

snapper Z rider, yard cruiser. 14.5 hp B&S. It runs great but it has got where it smokes on and off. lite blue smoke. Can be running along and it will start smoking for a couple of mins. then stop smoking then it does it again. thanks Joe.


#2

I

ILENGINE

Give us the model number of the engine so we know what you have. But the problem is sounding like then beginning of a blowing head gasket.


#3

Y

yellowbeard

YBSXS5012VP


#4

I

ILENGINE

That is the EPA family number and doesn't mean anything to anybody other then them, and I am not even sure about that. the numbers I need will either be on the valve cover if OHV or on the blower housing if flat head. will say Model, type, code above the numbers.


#5

R

rarebear

Not to ask a dumb question but your oil level isn't over filled is it?


#6

Y

yellowbeard

oil level is ok


#7

Y

yellowbeard

hard to read model no. but I think it's 297707 model. 1236-f-1 type.


#8

I

ILENGINE

If the head gasket is starting to blow between the cylinder wall and the push rod cavity it will cause smoking sometimes intermittent. Also can be caused by pooling of oil in the breather The breather problem is not as common as the head gasket, so would start there.


#9

Y

yellowbeard

thanks for the info. will start there.


#10

Y

yellowbeard

Got it apart, It is the head gasket. Between the cylinder wall and the push rod cavity. But I dropped one of my valve caps, And I guess it went where all those socks go when they disappear in the dryer. Got to pick one up. Guys do you know the torque on the head bolts? and the steel push rod on top, right? thanks Joe


#11

I

ILENGINE

220 in/lb and the steel rod goes on top which is the exhaust.


#12

Y

yellowbeard

thanks, Joe


#13

B

bertsmobile1

yellowbeard said:
Got it apart, It is the head gasket. Between the cylinder wall and the push rod cavity. But I dropped one of my valve caps, And I guess it went where all those socks go when they disappear in the dryer. Got to pick one up. Guys do you know the torque on the head bolts? and the steel push rod on top, right? thanks Joe
Click to expand...

Are you dead sure that it went outside the motor ?
Brcause if it ent inside the crankshaft will find it and play a nice golf shot right through the cases, not pretty.
Or it gets close & personnel with the oil pump also not pretty


#14

Y

yellowbeard

no place for it to get inside of motor. Had intake off. had head off motor, when it disappeared.


#15

Y

yellowbeard

ok, guys I have manage to do something wrong. put the head gasket on. torque the head bolts, put everything back together. Now it will not start, and backfires out the exhaust.


#16

I

ILENGINE

Recheck your valve clearance with the piston 1/4 inch down on the power stroke. Both valves will be closed.


#17

Y

yellowbeard

did not touch the valve adjustment, ran great before I replaced head gasket. just smoked.


#18

Y

yellowbeard

got it figured out, exhaust valve was to tight. Thanks again guys for your help.


#19

I

ILENGINE

You have to check/reset the valve adjustment every time you remove the head on a OHV engine. Variations in head gasket thickness, or bolt torque will change the valve clearance


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