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I have engine oil in my Radiator And over flow bottle. Motor still runs very well. this is not tranny oil olds 350 ci 1970

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Then you either have a cracked cylinder head or a leaking head gasket or intake manifold coolant crossover gasket.

Posted on Apr 20, 2017

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Posted on Jan 02, 2017

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Does anybody have a video link on how to flush the cooling system on a GM 3.1L SFI OHV 6cyl motor? I need a vid for this particular motor cause mine is still overheating & i have looked everywhere.


flushing a cooling system is the same method as any other motor

do it without the thermostat fitted
or water pump opening

sacrifice an old radiator hose to adapt a garden hose fitting
for radiator flush

air in system fix
your thermostat housing has no air bleed valve
no top radiator cap

old school way
heater on full
run motor till thermostats fully open
burp radiator hoses
wait till water is running up into over flow bottle without bubble
replace cap
turn off heater
correct level in over flow bottle

why still over heating
you fitted everything i would have ... yet still overheat
possibles
leaking inlet manifold gaskets
hose clamps loose
cooling fans spinning too slow
thermostatic fan switch faulty
aluminum radiator is a big one
air ..fins bent or some water channels blocked

or possible head gasket leak




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Nov 02, 2016 | Cars & Trucks

1 Answer

I recieved a radiator for a 1998 chevy c1500 with engine oil cooler and tranny oil cooler. Will this fit correctly in my 1998 k1500, which has both engine and tranny oil cooler?


Send it back and get the right one. You will need the fan shroud to fit the stock style radiator to have better cooling and good air flow across the condenser for optimal a/c performance.

Oct 21, 2013 | Cars & Trucks

1 Answer

I have a 1986 Scirocco 16V race car. the engine is basically stock. I have rebuilt the entire engine, cleaned out passages, etc. It runs fine but overheats every time. I replaced the water pump,...


the water flow through the heater system is part of the flow on these vehicles ,so reconnect them then check the thermostat is the right one as one version has a two part thermostat ,it has two water closing parts and the other type has one like conventional stat and if you fit this one in the other engine then it will overheat .start engine and see if any bubbles come up in the bottle when it runs ,i susp?ct the head is distorted or the water ports are corroded allowing pressure into the cooling system

Aug 01, 2011 | 1987 Volkswagen Scirocco

1 Answer

Where is the thermostat on a 96 audi a6


The thermostat on most internal combustion engines controls the flow of coolant to the radiator and this is fed into the top tank of the radiator.

The bottom hose is normally at the inlet to the coolant pump.


Vehicles with AC will have two radiators, and even some, a third for transmission or oil cooling but the largest of them will be the one handling engine cooling.


Locate the topmost hose of the radiator and simply follow it back toward the engine and it is normally connected to a dome-like fitting, under which you will find the thermostat.


If you are experiencing overheating though, it may not be a failed thermostat; this can be caused by a radiator blocked with debris, an internally collapsed hose and worst case, a failing head-gasket. The latter can fail in several places and overheating is often caused by the failure of it between coolant channels and one or more of the cylinders. This allows passage of hot combustion gases directly into the coolant flow.


Check the following: the overflow bottle for traces of oil contamination and possible odor of exhaust fumes, the oil dipstick for a milky deposit and when the engine is running, the overflow bottle for bubbles.

Jun 13, 2011 | 1996 Audi A6

1 Answer

My transmission fluid turned brown. I beleive from getting hot.The bad radiator I think caused this. Should I change the fluid or leave it alone?


You are right to look at the tranny fluid as worn...as it has turned brown. This happens naturally over time and mileage. Depending on the mileage, sometimes it is not recommended to open the transmission pan to change fluid and filter. If over 100,000 miles, check with your local shop for tranny flush or fluid filter change per warranty consideration. You can add a bottle of Lucas Oil Transmission Stabilizer to your tranny without having to drain any fluids. I have used this often on higher mileage cars with great success. The bottle costs about $11. even at your local Walmart:) Read the instructions carefully as the full bottle contents need to be added with engine running and tranny warm. Hope this helps.

Mar 18, 2011 | 1998 Oldsmobile Silhouette

2 Answers

Jaguar overheated, radiator cracked on warm water side, repaired radiator, start and test, running hot again, stopped, obtained new thermostat with relevant piping, old thermostat broken into 5 pieces,...


Jags are HARD to work on, and even HARDER to buy parts for ... so ... have you ever heard of K-Seal? If it WORKS, it could save you $1,000's! If it doesn't work, you're out less than $20!

May 11, 2017 | 2003 Jaguar X-Type

1 Answer

Yes it is normal just no hot air


1. When setting the temperature to MAX, blower level to FULL and outside air Vent CLOSED, no hot air comes out after 2-5 minutes?
If YES, when did you last flushed your radiator and is it full?
2. if more than 5 years ago, flush radiator system, instructions are usually in Owners manual. Use a bottle of Radiator cleaner, run egine hot for about 10-15 minutes, carefully open petcock in bottom of radiator to flush out radiator, WARNING, careful as flushed coolant would be boiling hot. As sson petcock is open and water start to flow out, carefully open radiator cap to enhance flushing flow. Use garden hose to fill radiator while flushing until water coming out from petcock is cold and clear.
Once clear, start engine, turn heter full and blower full blast and keep hose in radiator flowing full, leave petcock open until clear water flows out again. Once clear waters comes out, turn off engine,turn off garden hose and let water drain empty radiator. Once it stops flowing out, close petcock snug and put radiator cap on, pull off radiator coolant catch bottle, clean bottle for any debris and dirt. Drain any water, leave bottle empty and put it back onto its place.
3. Fill radiator with 1 gallon (4L) of concentrated coolant, top up radiator until full, fill catch bottle with concentrated coolant, start engine and keep it overflowing until no bubbles comes out and the radiator is fully hot. Once it is flowing good, close and connect everything. Drive with it and keep catch bottle filled as necessarry.
Good luck. Give as vote and good comment if this advise solve youor problem. Thank you.

Jan 05, 2011 | 2000 Chevrolet Suburban

1 Answer

1991 f350 , 460 ci , automatic wont go into overdrive when the tranny gets warm


ok chech the water hosed in the radiator (both) because if the trans oil is over heat the trans got problems. The trans oil runs trough the radiator.

Oct 21, 2010 | 1991 Ford F350

2 Answers

My 1999 Olds Intrigue, 3.5 motor, auto trans, heats up when going uphill. Going downhill, or on a flat road, with the same number of RPMs, it does not. Recently had the engine cooling system flushed, and...


could be a good candidate for the overheating problem
it is probably the oil line that goes to the oil cooler in the radiator and if it doesn't have sufficient flow then the oil in the transmission gets progressively hotter
before replacing it consider this
transmission oil coolers that are in the radiator tank keep the oil at coolant temps which is around 95 C
if you spend a bit of cash and fit an air to air transmission cooler , it brings the operating temp of the oil down to 1/2 ambient temp
besides the fact that your are now removing an added heat source from the coolant of the engine the results are --cooler running engine and cooler running transmission
worth talking to an accredited transmission specialist shop

Apr 03, 2017 | 1999 Oldsmobile Intrigue

1 Answer

My 2001 lincoin ls gauge goes up to the h and then come back down


you probably have air trapped in the system. Have dealer or radiator shop bleed system.

I assume your cooling fan is working.

what engine v6 or v8?

SECTION 303-03: Engine Cooling 2001 Lincoln LS Workshop Manual
DESCRIPTION AND OPERATION Engine Cooling The cooling system components include the:
  • block heater (optional)
  • cylinder head temperature sensor
  • fan blade, fan motor and fan shroud assembly
  • radiator
  • pressure relief cap
  • degas bottle
  • radiator draincock
  • water pump
  • oil cooler (optional)
  • water thermostat
The water thermostat:
  • controls the engine coolant temperature.
  • allows quicker engine warm-up.
The degas bottle:
  • provides a location for system fill.
  • contains coolant expansion and system pressurization.
  • provides air separation during operation.
  • replenishes the engine coolant to the system.
The fan blade draws air through the radiator to help cool the engine coolant.
The fan motor:
  • operates only when the engine is running.
  • will not operate when the engine is off.
The engine coolant flows:
  • from the lower radiator hose to the water pump.
  • from the water pump to the engine block and the cylinder heads.
A closed water thermostat returns the engine coolant to the water pump. An open water thermostat allows the engine coolant to flow to the radiator.
Unsatisfactory coolant materials:
  • Alcohol-type antifreeze does not provide adequate water pump lubrication.
    • has lower boiling point
    • reduced antifreeze protection
  • Alkaline brine solutions will cause serious engine cooling system damage.
The cylinder head temperature sensor provides a signal to the temperature gauge.
  • will invoke failsafe cooling.
The optional block heater:
  • electrical heating element is installed in the block cooling jacket.
    • uses a standard 110V (220V in Europe) electrical supply
  • keeps the engine coolant warm during cold weather.
The auxiliary water pump (3.9L only):
  • provides heater coolant flow boost.
  • has a secondary function of providing engine-off cooling.

May 01, 2009 | 2001 Lincoln LS

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