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Hi. I have a cadillac BLS with a saab engine. It has a very high oil presure reading and the engine is rattling because of this. It has been stripped and all oil ways blown through, new turbo fitted, oil pump stripped and rebuilt, new timing chain set fitted and the head removed oil ways cleared and then re-fitted. The car now smokes like hell on start up but dose get better after a short time but the oil pressure is still way to high. Apart from a new engine, any sugesstion?

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

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  • 110 Answers

SOURCE: 1.5 diesel. Blue smoke, not

Not sure what you mean by "heavy on diesel".   Most diesels, except for late models say 2005 or newer, will have a tiny amount of smoke when cold.  It's hard for a cold motor to combust diesel without a little smoke.  
My money would be on one or both of the other two injectors, dirty, dripping or bad spray pattern.  If you near anything lke a small city, you may be able to find a shop that has the abilty to clean and check them. I use a big marine diesel shop, RPM, in Ft Lauderdale, they can generally get injectors back to new for cheap (maybe $30 each) and have a big expensive high tech machine to test them (they can afford to, they use them for engines on million dollar yachts, among others).  The hyundai injectors might be cheap, the Bosch ones are not.
Injector cleaner in a can that the parts store is happy to sell you, has not worked for anyone I know.   
If you ever lay the car up (e.g. go away on holiday for a month so) put additive in the diesel to keep bacteria from growing in it.  If you can't get it in the auto store, try a marine store.

Posted on Oct 30, 2008

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SOURCE: 1989 chevy 350 automatic, white smoke

white smoke is antifreeze try checking the compression

Posted on Nov 08, 2008

mecanica03
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SOURCE: Nissan Timing Chain still rattling

and the lower chain guides?

Posted on Apr 20, 2009

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SOURCE: start motor , no oil pressure showing on guage ,

i would find and replace the oil pressure sending unit although oil pressure is ok the computer needs to know or else it will shut down engine and it seems like your oil pres. sending unit is starting to stick.

Posted on Feb 01, 2010

  • 87 Answers

SOURCE: WHEN STARTING WILL SMOKE HEAVY

I would think that the blueish smoke is most likely from the valve stem seals leaking. When they leak they allow a small amount of oil to pool on the top of the pistions. When you start the engine it will smoke for a little bit then it will clear up. I would look in to changing these, however it will require removal of the lifters, valve spring,ect. Another suggestion is to try running an oil thicking product such as Lucas Oil Treatment or NO SMOKE.

Posted on Mar 05, 2011

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