Question about Volkswagen Microbus

1 Answer

I over heated the engine.I had the cylinder head removed and reconditioned, pressure tested, new rings,new fan censer fitted. header tank replaced etc.(no evidence of blowen gasket) Now after about 20 to 30 klms the engine over heats, the fan did not kick in. So I let the engine cool down, topped up the water and nursed the vehicle home. Now, while checking the engine in my garage at home the fan started to kicked in. Please can you help? Does the water system have to be bleed of air?

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 766 Answers

If this ever happens again turn the internal heater to full, it helps in the cooling. When filling the engine with coolant the heater should be on full. As the engine warms squeeze the top radiator hose regularly to encourage air bubbles to shift to the expansion tank. If the coolant level looks low after the engine has been brought to full running temperature and air has been purged from the system then top up with additional coolant. Note that the signal to run the fan is sent by the coolant sensor, if the coolant is low the sensor cannot function. Check your engine error codes, sometimes if the coolant sensor cannot detect normal running temperature (perhaps due to low coolant level) the engine is unable to enter closed cycle mode and reports p0125. Closed cycle is the normal running state of an engine at normal running temperature; open cycle denotes the times when the engine is cold such as at start up or when the engine is under load such as when accelerating hard.

Posted on Apr 03, 2011

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My 2011 Kia Cerato "S" has been using a lot of oil. The cylinder head was re-conditioned and engine serviced. The now engine blows smoke every time on starting. What is the probable cause ?


depends on how the head was reconditioned
were new valve guides installed along with new valves
were the stem seals correctly fitted
was a compression test done to determine the wear condition of the engine
smoke on start up is oil in the combustion chamber from valve stem seals , worn rings , sump pressure from excessive blow by through the line to the air inlet
check for oil leaks ( filter etc ) but using a lot of oil indicates ring problem, excessive bearing clearance overloading the oil control ring
try using a heavier grade of oil 30w 50 or oil for worn motors

Dec 04, 2016 | Kia Cars & Trucks

2 Answers

How do u no the rings are gone in ur engine


You know when the rings are gone because its hard to start /loss of oil on dipstick/ black smoke when starting up and running /fumes from under the bonnet and loss of power.
Also could be your converter blocked.

Nov 16, 2014 | Cars & Trucks

1 Answer

I have a mitsubishi 4D56 Engine ( Hyundai ) - which blew a head gasket. We removed and recon'd head and re fitted. We fitted new rings. The engine is now pushing oil out the breather. What is causing this?


If you put new piston rings in the engine without doing anything to the cylinders themselves, you most likely have a sealing problem between the rings and the cylinder walls. This will cause blowby and pressurize the crankcase causing the problem. Also check for a clogged PCV valve.

Aug 23, 2014 | 2006 Mitsubishi L200 2.5

3 Answers

What controls pressure in cooling system 1.5dci renault


I agree with Mike, but suspect you already have a measuring device to know the pressure is excessive. You should get the cap checked first.

But additional pressure that keeps coming out of the radiator above the release limit of 14-18 lbs is probably due to escaped compression from the engine cylinders. You will see bubbles inside the radiator while the engine runs.

Sometimes you will get water in the cylinder after the engine sets under pressure, but not always. Your engine works at about 140psi in the cylinder more or less. The radiator at 14-18 psi. A leak in a head gasket may take more than 14-18 psi to leak. So the leak acts like a one-way valve shoving air into the cooling system. Since the cooling system loses pressure as it cools, the water may not flow back into the cylinders when the engine is not running.

This is sometimes indicated in a cylinder bleeddown test where high pressure is shoved into the cylinder. Bubbles may be observed in the radiator from escaping air. Otherwise a compression drop in a cylinder may as easily be due to bad rings.

I hope my solution is helpful.

Sep 01, 2012 | 2005 Renault Megane

1 Answer

Broken timing belt


Hi Nunley, I'm not sure if this engine design protects the valves or not in the event of the timing belt breaking. If it does all you need do is replace a new belt and you're off, but I think that if it breaks it means big problems. The problems will come in the form of bent and damaged valves and possibly also damaged pistons. The best way to find out for sure is to fit a new belt, with the crankshaft on the TDC mark and with the cam shaft aligned to the notch marks at the rear of the cylinder head (if memory serves well) I believe that an insert is needed that fits into the slots and aligns with the top surface of the cylinder head. Fit it and then give it the correct tension, rotate the engine by hand with the correct size spanner (wrench) and recheck the alignment of the marks with each second revolution of the engine. if they match up, before doing any more assembly, carry out a compression test. If the compression shows a failure of pressure build up, suspect bent and damaged valves and that will mean a cylinder head reconditioning job. Don't shoot the messenger. Best of luck John

Nov 29, 2011 | 1994 Ford Escort

3 Answers

OK my friends..I found out that the battery cable was bad on my daughters 2000 Kia. I turn the key, the engine cranks, and water starts to pour out of the exhaust. Head gasket, right. 131,000 miles. I ask...


Is water disappearing from the header tank? It`s common to get water out the exhaust especially on cold days but if it`s disappearing from the header tank and it`s difficult to turn over then it does sound like the head gasket. It may be repairable but you would need to remove the head and have it checked by an engineering company for flatness and pressure testing.

John

Dec 02, 2010 | 2000 Kia Sportage

2 Answers

Land Rover 3.9 V8i Cooling Problem


Pressure test the system, it sounds like head gaskets that is backing into the water jackets and not the oil ports, which is the best of the two. Have heads checked for cracks of warping.

Jun 15, 2009 | 1996 Land Rover Discovery

1 Answer

2001 pt cruiser temperature is hot, fan does not come on


Hi

Sounds like you have head gasket problems.

2 ways to test this out are,

1. Pressure test the cooling system up to 15 lb sq in, with a cooling system tester pump,
( Available at any good car parts store )
Remove your spark plugs, wait about 1 hr, then get someone to spin over the engine, and monitor for coolant blowing from the plug holes.
This will confirm cylinder head, or the gasket is leaking.

2. Cooling system carbon monoxide test.
( Tester available from any good car parts store.)
The engine is run to normal temp, the tester is filled with fluid, and put in the header tank opening, and the suction ball squeezed, causing the gases in the header tank to pass through the fluid.
If there are any exhaust gases (carbon monoxide) present the fluid changes color, once again
confirming cylinder head, or the gasket has failed.

The reason you sometimes can´t start are the coolant leaking into the cylinder, shorts out your plugs, and the increase in your coolant temperature is due to loss of coolant into the bores, and over pressurizing of the cooling system, and blowing your coolant out the overflow as you drive.

Hope this has been helpful to you.

A FixYa Rating would be much appreciated Thank You !

Any further questions, please ask !

John.

Feb 10, 2009 | 2001 Chrysler PT Cruiser

15 Answers

Mitsubishi L200 overheating


i have an l200 animal, i started getting the same symptoms, bubbling noises, over heating, water being discharged into the header tank, i had a good look around the engine,there was no oil in the water or water in the oil ( signs of head gasket failure) when the radiator cap was off and i revved hard nothing happened, no dip in water levels and no splashing out. i took the water pump off and the impellor had sheered off the shaft. fitted a new pump and its been fine, maybe all these cracked cylinder heads and warped heads are to do with the engine being run with the fault not being cured.

Dec 26, 2008 | Mitsubishi L200 Cars & Trucks

7 Answers

Mazda bongo 2.5 turbo diesel 1996. over heating


no im a mechanic it sounds like that you have an air lock in the cooling system .i am familiar with ford freda and bongo and the design where the engine is is a bit far from the radiator ,so the problem with air locks magnifies.really the solution is just drain the water and refill it slowly while you are pressing and releasing,just repeat the action on the top radiator hose to get rid of any air trapping within the system,it's as simple as that really.you want it to have just water and no air as this will cause a blockage.

Jun 28, 2008 | 1996 Mazda MPV

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

204 people viewed this question

Ask a Question

Usually answered in minutes!

Top Volkswagen Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

yadayada
yadayada

Level 3 Expert

75077 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7768 Answers

Are you a Volkswagen Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...