Question about 1987 Suzuki Samurai

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FINISHED HEAD SWAP, SAMURAI WON'T START.

THE SCENARIO;I SWAPPED THE CYLINDER HEAD.THE VEHICLE WAS RUNNING ROUGH AND BLOWING OIL ALL OVER THE ENGINE. ORIGINAL HEAD IS MARKED ON THE CASTING "S2", NEW ONE IS MARKED "S6". OTHERWISE IT SEEMS IDENTICAL.I HAVE IT ALL ASSEMBLED, TIMING MARKS ALL LINED UP AND INDEXED OFF THE MARKS ON THE FLYWHEEL. I DON'T KNOW IF THE VACUUM HOSES ARE IN THEIR ORIGINAL POSITIONS BUT THEY'RE HOOKED UP. ENGINE WON'T START. GOT FUEL FLOW AND SPARK. ANY IDEAS?

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  • Samuel Charles Spriggs May 11, 2010

    I did a quick check on the internet and it appears that castings S2 and S6 may not be interchangeable. I'd suggest first looking into that a little further.

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Piston rings worn,,oiling up plugs, and cousin back pressure.Thats why you have oil blowing out every where.

Posted on May 27, 2009

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We think that it stopped running due to no fuel. the engine ran rough ever since. Seems to be flooding to the point that fuel was getting into the oil in the sump. Running rough ever since.


Get a cylinder compression test done to check head gasket and to check head is not warped or cracked.
if head gasket or head problem = one cylinder may be affected causing fuel could get into the oil via a blown head gasket. if one cylinder not firing it would run rough.

Has the engine been over heated recently ?

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What are the sighs of a bad head gasket


there are a few ways that a head gasket can go bad.
1. it can blow between cylinders, which causes rough running.
2. it can blow between water and oil passages, which will either get you engine oil into your radiator or antifreeze into your engine oil. you will be able to see these as light brown froth on the dipstick, or when you open your radiator you will see the froth there too.
3. it can blow from the cylinder to the exterior which will cause rough running again and loud repetative hiss when the engine is running.
4 it could blow from a coolant or oil passage to the exterior, which will cause a coolant or oil leak where the block meets the head.

hope this helps ~ Zach

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Loss of rings on number 1 piston. You don't mention the other cylinders. Or you may have a blown head gasket between the cylinder and the oil journal.

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4g63 delica black smoke running rough


You have a failed head gasket

Major repair

Hope you didn't think the stop leak was
a genie in a bottle,never need any product
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White smoke was coolant ,should have known that

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1 Answer

My 97 honda accord is blowing white smoke and running rough then i went to start it now it wont start


Sounds like either a blown motor (rings need replaced) or a bad head gasket or cracked head.
If the rings are bad your car would have felt like it was losing power because the engine will no longer have the same high compression that it's required to turn the wheels. You may have heard your engine knocking or seen a light blue colored smoke coming from your exhaust as a result of your engine burning up oil in the combustion chamber from the rings leaking.
If your head gasket is leaking or your head is cracked you'd likely find milky looking oil when you drain your oil from water/antifreeze being mixed in and noticed a white smoke coming from your exhaust that is actually water vapor coming through the exhaust.
If your car was running rough when you last shut it off try pulling all of your spark plugs and either cleaning them or replacing them all. A bad head gasket or bad rings can both foul spark plugs. A car will run rough with 1 or 2 fouled plugs, but once enough foul it will no longer run at all just sit and crank over. If changing the plugs get's it started for ya, check your tailpipe first for water, if nothing, change your oil. If no signs of water/antifreeze or milky colored oil then it's probably rings.

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91 cressida running rough also blowing smoke nothing wrong with head gasket any clues??


white smoke would be a sign of a head gasket blue smoke is a sign of burning oil black smoke is a sign of a fuel problem so blowing smoke and rough running do a compression test and look for a weak cylinder

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1 Answer

Car just started running rough with white gas smelling smoke comming from exhaust


Sounds like head gasket needs replaced or worse one of the heads is cracked leaking antifreeze into cylinder burning out the exhaust, would advise not to continue running as you can lock up the engine if antifreeze is leaking into the engine oil. It will seize the bearings blowing your engine.

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1 Answer

1994 Mazda B3000 V6 engine oil pushes into coolant. Have to add engine oil all the time and drain the recovery bottle. 65,000 miles. Never been overheated.


Failure of head gasket between cylinder head and block.

Because oil pressure is higher than coolant pressure, oil will creep across poor sealing area of head gasket from the oil riser drilling that feeds the cylinder heads cam assembly's.

Worst case scenario would be a cracked cylinder head/s. No totally unheard of but rare.

Continued oiling of the coolant system will rot out the coolant hoses from the inside to the point they will burst.

Due to the year of this engine it may be prudent to find a used engine with less miles and swap it out.

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