Question about 1991 Peugeot 405

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My turbo diesel 405 is creating pressure in its water system any quick fix ideas,s to keep me goin .dave b

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Hi Dave. You should have the sick in the gut feeling by now... pressure in the water system is a sure sign of a head gasket failure. There are no quick fixes for head gaskets most of the time... you can try a product called "stop leak" but I have never had any luck using it to resolve a head gasket leak. Most any product you use or introduce into the coolant to try and stop the leak will have side effects that usually end up costing more money down the road.

The first thing you do is loosen the radiator cap to the first notch and leave it there until the head gasket is replaced. It will require you OFTEN add coolant / water to your radiator and will bypass the function of the coolant recovery tank.

I wish I could be of more help here. I just want to be honest about what your up against.

Kelly

Posted on Feb 07, 2010

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Hello i have a 1994 gmc 6,5 diesel turbo and under load is overheating i replace fan clutch, thermostat and when remove the water pump the driver side of the block was dry any idea


Sounds like it might be blowing gases into the water jacket. Blown head gasket?
I would fill system up, start engine with rad cap closed. Rev up COLD engine and then check the upper rad hose for pressure. Squeeze it. If it seems to have pressure already, its likely head gasket. Put a towel over rad cap and take it off slowly, listen for pressure release while still cold engine. (Bad sign) Then wait for it to warm up and themostat to open, rev the engine and look for bubbles in the flow of coolant which burst with a little puff of steam or smoke. If neither of these happens, that is a good sign of not being head gasket. But it may be occuring only at high pressure, "under load". Dont know how much load that means..
Good luck
PS. I'm not really an expert here, (turbo diesels) just general knowlege.

Sep 04, 2011 | GMC C3500 Cars & Trucks

1 Answer

Peugeot 407, 2.0 litre diesel, 05,loss of power/air surge heard


I am not familiar with the 407 but I would think it is a HDi, if so what you describe is an air leak from a pipe from the pressure side of the turbo, I have had this on a Saab, in that case there was an over pressure switch under the dash and the pipe fell off. Look at the top of the engine, on the inlet side there will be a pipe from the inlet trunking or manifold, it should (maybe with a tee piece in there) go through the bulkhead

May 18, 2010 | 2005 Peugeot 405

2 Answers

Peugot 405 estate diesel turbo n reg


Sounds like a blown cylinder head gasket between the water and oil passages and galleries. Is the amount of oil significant..not just a hint of a film? Do you have any sign of creamy looking 'mayonnaise' on the under side of the oil filler cap and entrance? This would be sign of the reverse i.e. that water had got into the oil. The oil in the engine is driven around the galleries under pressure, certainly more pressure than the coolant, so if there is a connecting leak oil will be forced through it into the coolant. The best way to make sure is to have your coolant system pressure checked by you local garage when the engine is really cold. With the engine off and the oil filler cap removed a leak will be indicated by the coolant pressure dropping slowly (as water is forced through the leak back into the oil system). Also monitoring the pressure of the coolant when the engine is started from cold will also reveal a leak. The coolant is at normal atmospheric pressure when cold and only when the engine gets hot does the pressure within the coolant system rise (somewhere between 7 - 10psi depending on power unit). However if there is a leak the pressure of the coolant will rise rapidly as the oil system reaches pressure quickly, in other words the coolant system will be forced to the same pressure as the oil system through the leak. The remedy is to renew the head gasket.

Apr 16, 2010 | 1990 Peugeot 405

1 Answer

Hi i have a peugeot 405 diesel and the speedo


I had a similar problem with my old peugeot 405 diesel, something electrical was shorting and actually sparking in the engine compartment which in my case the garage fixed very easily. Same symptoms, the speedo flickered at low speeds but stopped at higher speed.

Sep 21, 2009 | Peugeot 405 Cars & Trucks

3 Answers

Heater matrix has gone on my 405 diesel bypassed it


sounds like your inner cooler is leaking and is causing an air lock within your coolant system. Sorry to hear this, changing this part is time consuming. Hope this helps you.

Jul 26, 2009 | 1991 Peugeot 405

1 Answer

Where is the themostack on a h100 turbo engine?


Usually it is close to the water pump.Two smaller size hose should come out from under the cover of the thermostate .You probably need to remove the top cover to see the thermo valve itself.If the thermostate not working(or not working temporary)then main radiator in the front of the wehicle stays cold.Thermostate can get stuck,it means that it is working sometimes,sometimes not so the hot water cant get to the radiator to cool down .Pressure goes high up ,water runs everywhere.There is one more thing can cause such problem on your car.If the water reaches a certain temp then a ventilator should turn on on the radiator which suppose to cool down the water.If you drive fast enogh then the travel wind can do the same thing .So probably your ventillator stoped working.

Jul 23, 2009 | 1999 Hyundai Accent

2 Answers

Peugeot 306 won`t start off ignition


check your glow plugs they may be damaged or dirty

May 25, 2009 | 1991 Peugeot 405

1 Answer

Loss of power on hills


Hi, i think i answered you in another post.
If not then the likely cause of your problem is turbo related the most common cause is one of the pipes going to the turbo has a small split in it causing this problem.

Nearly all the diesel turbo cars with your problem usually means a pipe needs replacing for the turbo this will need to be checked as it can be difficult to find the damaged pipe because they work under high pressure so actually seeing the damaged part can be difficult so check properly.
If you are unsure then get a garage to check this as they will know the fault and will have a good idea exactly which pipe is damaged.
Worst case of this will be that the turbo needs replacing but this is in the most severe of cases the turbo can blow if the pipe has been damaged for to long as it will be working under the wrong pressure.
What happens is when you acelerate the turbo builds up pressure giving you more power when you need it but when the pipe becomes damaged this pressure is lossed and you then lose power and will cause black smoke coming out of exhaust.

Hope this is some help to you but if you have any problems or questions then give me a shout back and ill be glad to assist you further ok

May 20, 2008 | 1989 Peugeot 405

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