Oil burner
Thread Starter
Safety Car
Joined: Jan 2008
Posts: 3,795
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From: Aarhus, Denmark
Oil burner
Hi,
We have a small problem with 1971 SBC engine.
Peter did take his heads of the engine, and grinded the valves and seats, and gave it new oil seals.
Then he installed 1.6 rocker arms, and alu intake. But now the engine smok BIG time, why??
"High" rpm = a lot of smoke.
What is the problem?
Br,
John
We have a small problem with 1971 SBC engine.
Peter did take his heads of the engine, and grinded the valves and seats, and gave it new oil seals.
Then he installed 1.6 rocker arms, and alu intake. But now the engine smok BIG time, why??
"High" rpm = a lot of smoke.
What is the problem?
Br,
John
Burning Brakes
Joined: Jan 2012
Posts: 943
Likes: 73
Hi,
We have a small problem with 1971 SBC engine.
Peter did take his heads of the engine, and grinded the valves and seats, and gave it new oil seals.
Then he installed 1.6 rocker arms, and alu intake. But now the engine smok BIG time, why??
"High" rpm = a lot of smoke.
What is the problem?
Br,
John
We have a small problem with 1971 SBC engine.
Peter did take his heads of the engine, and grinded the valves and seats, and gave it new oil seals.
Then he installed 1.6 rocker arms, and alu intake. But now the engine smok BIG time, why??
"High" rpm = a lot of smoke.
What is the problem?
Br,
John
Burning Brakes
Joined: Jan 2012
Posts: 943
Likes: 73
If its a white, white like a steam and not a grey white, then your burning water. Since the heads were pulled, you probably have a coolant leak. If you have a coolant system pressure tester, you can pressurize the system to confirm it. You can also pull the spark plugs, spin it over to see which cylinder spits some water out the plug hole. Check the oil to see if water is mixing with it, you don't want to destroy your bearings.
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From: New Or-leens Loo-z-anna
If it has an automatic transmission, the modulator valve on the side of the trans. could be defective causing trans fluid to be sucked into the engine thru the vacuum line.....it will make an oilysmelling whitish smoke.
Thread Starter
Safety Car
Joined: Jan 2008
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From: Aarhus, Denmark
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From: New Or-leens Loo-z-anna
If you remove the vacuum line from the tube on the accumulator, you may see trans fluid dripping from the vacuum line or the accumulator....the accum. would need to be replaced even if it isn't the main cause of the smoking.
OOOOOOOOOOOOOOOPS......it's a MODULATOR/not an accumulator...........sorry about the wrong word!
OOOOOOOOOOOOOOOPS......it's a MODULATOR/not an accumulator...........sorry about the wrong word!
Last edited by doorgunner; Aug 2, 2014 at 02:58 PM.
Thread Starter
Safety Car
Joined: Jan 2008
Posts: 3,795
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From: Aarhus, Denmark
If you remove the vacuum line from the tube on the accumulator, you may see trans fluid dripping from the vacuum line or the accumulator....the accum. would need to be replaced even if it isn't the main cause of the smoking.
OOOOOOOOOOOOOOOPS......it's a MODULATOR/not an accumulator...........sorry about the wrong word!
OOOOOOOOOOOOOOOPS......it's a MODULATOR/not an accumulator...........sorry about the wrong word!
So the modulator is ok ??
Last edited by c3_dk; Aug 2, 2014 at 04:01 PM.
Le Mans Master
Joined: Oct 2002
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From: Las Vegas - Just stop perpetuating myths please.
White smoke is normally water/coolant but i have heard of trans fluid/oil smoking white also - even just dripping onto the exh pipes.
Each cyl in the block is surrounded by water and the oil return cavities in the heads are a lot further away from the cyls. Normally if a head gasket leaks it will use coolant long before oil. It only takes a little debre on the block deck or head surface to start a leak. Heads and block deck need to be squeaky clean before installing head gaskets. Clean enough to see the machine marks left on the block deck (but not remove any of them). Many head gasket require sealer too.
Peter needs to monitor his fluid levels and see where the source is. Removing and reading the spark plugs might help here.
Also can he see bubbles in the radiator (looking before it gets too hot)?
Each cyl in the block is surrounded by water and the oil return cavities in the heads are a lot further away from the cyls. Normally if a head gasket leaks it will use coolant long before oil. It only takes a little debre on the block deck or head surface to start a leak. Heads and block deck need to be squeaky clean before installing head gaskets. Clean enough to see the machine marks left on the block deck (but not remove any of them). Many head gasket require sealer too.
Peter needs to monitor his fluid levels and see where the source is. Removing and reading the spark plugs might help here.
Also can he see bubbles in the radiator (looking before it gets too hot)?
Last edited by cardo0; Aug 2, 2014 at 11:30 PM. Reason: little more
Thread Starter
Safety Car
Joined: Jan 2008
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From: Aarhus, Denmark
White smoke is normally water/coolant but i have heard of trans fluid/oil smoking white also - even just dripping onto the exh pipes.
Each cyl in the block is surrounded by water and the oil return cavities in the heads are a lot further away from the cyls. Normally if a head gasket leaks it will use coolant long before oil. It only takes a little debre on the block deck or head surface to start a leak. Heads and block deck need to be squeaky clean before installing head gaskets. Clean enough to see the machine marks left on the block deck (but not remove any of them). Many head gasket require sealer too.
Peter needs to monitor his fluid levels and see where the source is. Removing and reading the spark plugs might help here.
Also can he see bubbles in the radiator (looking before it gets too hot)?
Each cyl in the block is surrounded by water and the oil return cavities in the heads are a lot further away from the cyls. Normally if a head gasket leaks it will use coolant long before oil. It only takes a little debre on the block deck or head surface to start a leak. Heads and block deck need to be squeaky clean before installing head gaskets. Clean enough to see the machine marks left on the block deck (but not remove any of them). Many head gasket require sealer too.
Peter needs to monitor his fluid levels and see where the source is. Removing and reading the spark plugs might help here.
Also can he see bubbles in the radiator (looking before it gets too hot)?
Thanks for the input, I will tell Peter.
But it is a bit funny, before he took his heads of, is was "fine", it used a bit of oil, but if was nothing compared to today. I think I will ask Peter to take a Picture for you all to see.
Thx,
John
Burning Brakes
Joined: Aug 2008
Posts: 878
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From: Deep South Denmark
Well that's a "little" more smoke than what's acceptable 
In the picture it looks blue to me? It's easy to smell if its burning antifreeze and the same with gasoline smoke. To bad smells can't be transmitted over the internet, right?
I'd start by removing the intake and see if there is oil in the intake runners (to check for leaky intake gaskets).
In the picture it looks blue to me? It's easy to smell if its burning antifreeze and the same with gasoline smoke. To bad smells can't be transmitted over the internet, right?
I'd start by removing the intake and see if there is oil in the intake runners (to check for leaky intake gaskets).
Thread Starter
Safety Car
Joined: Jan 2008
Posts: 3,795
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From: Aarhus, Denmark
Well that's a "little" more smoke than what's acceptable
In the picture it looks blue to me? It's easy to smell if its burning antifreeze and the same with gasoline smoke. To bad smells can't be transmitted over the internet, right?
I'd start by removing the intake and see if there is oil in the intake runners (to check for leaky intake gaskets).
In the picture it looks blue to me? It's easy to smell if its burning antifreeze and the same with gasoline smoke. To bad smells can't be transmitted over the internet, right?
I'd start by removing the intake and see if there is oil in the intake runners (to check for leaky intake gaskets).
Thread Starter
Safety Car
Joined: Jan 2008
Posts: 3,795
Likes: 435
From: Aarhus, Denmark
Well that's a "little" more smoke than what's acceptable
In the picture it looks blue to me? It's easy to smell if its burning antifreeze and the same with gasoline smoke. To bad smells can't be transmitted over the internet, right?
I'd start by removing the intake and see if there is oil in the intake runners (to check for leaky intake gaskets).
In the picture it looks blue to me? It's easy to smell if its burning antifreeze and the same with gasoline smoke. To bad smells can't be transmitted over the internet, right?
I'd start by removing the intake and see if there is oil in the intake runners (to check for leaky intake gaskets).
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From: New Or-leens Loo-z-anna
The modulator seems O.K.
Now that the intake is removed, clean all the gasket surfaces......
then set the intake in place WITHOUT GASKETS.
Is any part of the intake or engine surface preventing the intake from sitting properly in place?
Do the intake gaskets look/measure to be thick enough to seal the gaps between the intake and the engine?
Can you post pics of the front/ rear/ left-side/ right-side/ gaps between the intake and the engine block with NO gaskets installed?
Check the compression of each cylinder and post the results?
Now that the intake is removed, clean all the gasket surfaces......
then set the intake in place WITHOUT GASKETS.
Is any part of the intake or engine surface preventing the intake from sitting properly in place?
Do the intake gaskets look/measure to be thick enough to seal the gaps between the intake and the engine?
Can you post pics of the front/ rear/ left-side/ right-side/ gaps between the intake and the engine block with NO gaskets installed?
Check the compression of each cylinder and post the results?
Last edited by doorgunner; Aug 3, 2014 at 08:28 AM.
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