smokey engine on 80 series
Submitted: Thursday, Mar 11, 2010 at 07:19
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caba
Hi All,
has anyone got any ideas about why my 4.5l petrol engine billows out oily smoke when I take off from a stop, but only happens when I am driving on the open highway. When I drive around town there doesn't seem to be any smoke, but when I am on the open road and slow down to come into a town the vehicle starts to smoke, then when I take off it looks like I am using oil as fuel for about 5 - 10 seconds until it clears itself. It does use a bit of oil on these journeys but none around town. I was leaning along the lines of valve stem seals as the engine has only done 200k. Any ideas would be appreciated before mechanics empty my wallet.
Thanks in advance
Reply By: Member - Rob S (NSW) - Thursday, Mar 11, 2010 at 21:12
Thursday, Mar 11, 2010 at 21:12
Hi
As the other replies.
Very common problem with the valve steam seals, on the 4.5 petrol
And the head has to be removed to replace them.
And yours sounds to be worse than
mine. probably needs the head doing.
Try using 20w/50 engine oil.
As i run on LPG i am using Penrite HPR 10 gas engine oil and found it smokes the least or very little if any now.
Rob.
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408468
Reply By: Stu & "Bob" - Thursday, Mar 11, 2010 at 22:19
Thursday, Mar 11, 2010 at 22:19
Caba,
If it is as bad as you make out, you will be better off in the long run to go straight for a reconditioned engine, or at least give yours a freshen up.
In a lot of cases, when the head is reconditioned, it accentuates any shortcomings in the remainder of the engine.
Your problem could be valve guides and seals, or it could be rings, or a combination of both. The way you describe it, the engine is getting excess oil into the combustion chamber when in a high vacuum situation.
my .02
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408481