Question about 2004 Suzuki Forenza

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Reading multi mis fire at start up

Also was loosing coolant but wasnt leaking, this is either a leaking head gasket or a small crack in the block

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When an engine is loosing coolant but not leaking there is only 2 things that can be happening,It is either going out the exhaust pipe as steam or it is leaking out of the heater core which if that is the case your passenger floor should be wet up under the dash.Hope this helps

Posted on Sep 06, 2009

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Do a compression test.that will tell you.
someone should make cast iron heads again.

Posted on Sep 06, 2009


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Posted on Jan 02, 2017

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Why is my 2005 chevy avalanche loose coolant, FAST. I did pressurize the system, but didn't find any leaks. Found TSB from GM about cylinder heads cracking at oil passage issue, but oil is clean.

Coolant can and is lost without getting in the oil from a leaking head gasket or cracked head or block. In the years as a dealer tech most often oil was not in the coolant.

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It is likely that you have a head gasket leak, possibly between coolant and oil passages, or maybe a crack in head or block. Get an engine compression check and a coolant leak down test to isolate this.

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When engine completely cools remove coolant from overflow reservoir to the cold mark on the reservoir which is the lowest mark on reservoir. If you continue to loose coolant you may have busted block.

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What wud cause my 300m 3.5 to burn antifreeze

A couple scenarios- none of them exactly cheap.
1- Head gasket blew or corroded; did it overheat at all recently? It may show a cylinder or two as mis-firing.
2- manifold leak. Are you also getting a lean error code?
3- porous casting or crack developed.

If you open the cap on the radiator hose with engine cold, or if you happen to have a radiator with a conventional cap, is there any oil film or sludge? Is there any on the dipstick/crankcase? If so, there "might be" a crack i nthe engine block. If you leave the cap off the hose or the radiator and start it cold- if you suddenly get a geyser of coolant- the problem is likely a cracked head or the head gasket is the issue.

"Some" white smoke may be visible when the engine is cold right after startup- this is a small amount and is reasonably normal if slight.

Dec 19, 2011 | 2002 Chrysler 300M

1 Answer

Possibility of a cracked block. how can i be sure/

Vehicles: Any with the above symptoms

A cracked cylinder block will cause either:
(a) motor oil contamination of engine coolant
(b) coolant contamination of motor oil
(c) white exhaust smoke, due to coolant seeping into one or more cylinders.
(d) more than one of the above
(e) all of the above

Oil infiltrating into coolant is easy to see - drain some coolant out through the pepcock at the bottom of the radiator, and place it into a styrofoam coffee cup. Oil droplets floating on top of the green (or orange) coolant are easily seen. Or visualize oil by looking into the top of the radiator through the radiator cap.
Coolant infiltrating into and mixing with motor oil will permanently damage the engine (seizing it up through loss of lubrication), and must be prevented.
A leak from above the front suspension is, as physicians like to put it, "nonspecific", with the most likely cause a water pump seal or hose/hose connection.
A leak from near the fire wall will usually be a heater core hose, or hose connection.
A coolant leak on the same side of the engine as the water pump is a leaking water pump or water pump seal until proven otherwise.

To rule out everythng else, here's the 1999 Honda CR-V Troubleshooting Guide for Coolant Loss/Coolant Leaking:

Priority Action Part Type Cause
1 Inspect Water Pump - Worn, Cracked or Leaking Water Pump, or Water Pump gasket.
2 Inspect Head Gasket - Leaking Head Gasket.
3 Inspect Radiator - Leaking Radiator Hose(s).
4 Inspect Radiator Cap - Worn or Damaged Radiator Cap.
5 Inspect Radiator Hose - Ruptured, Cracked or Leaking Radiator Hose.
6 Inspect Freeze Plug - Leaking Freeze Plug(s).
7 Inspect Intake Manifold Gasket - Leaking, Worn, or Damaged Intake Manifold Gasket.
8 Inspect Water Outlet - Cracked, Leaking or Damaged Water Outlet.
9 Inspect Heater Control Valve - Leaking or Faulty Heater Control Valve.
10 Inspect Radiator Drain Pepcock - Loose, Damaged, or Faulty Radiator Drain Pepcock, or Pepcock O-ring.
11 Inspect Engine (DOMESTIC ONLY) - Cracked Cylinder Block Leaking Coolant into at least one Cylinder, causing white exhaust smoke.

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1 Answer

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when you get coolant coming out of the cylinders when you have removed the plugs and turned the motor over by hand then you have a head gasket leak or cracked cylinder heads or possibly a cracked engine block.the only fix is to either rebuild the engine if there is nothing seriously damaged like a block or heads or find a good used motor from the wreckers and have it put in.

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2 Answers

Leaking coolant fromthe head gasket

need to replace gasket and have head checked for cracks and flatness

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1 Answer

Honda d16a6 cyl head on d16y3 block possible

Do the block chemical leak test and coolant pressure test to rule out blowning head gasket.
Check all freeze plugs to rule out coolant leak on the hot engine block.
Check for any hose leak.

Start monitor for coolant and oil lose.

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