cquisuila

right passager left driver i notice a "glouglou" when i engage the heater perhaps the other problem ? and i put a water valve as picture : perhaps a problem?? I will retry it - otherwise I looked at the oil by unscrewing pan oil < normal oil - i also looked the water in the radiator< it is very clean

no the engine well starts and the phenomenon occurs in a non-running vehicle with just the engine running

Unfortunately, it is too hot , no need for a thermometer 🥵 it is really over temperature On board the temperature gauge indicates this when arriving at H, so much so that it has simply stopped !! and the cover radiator is impossible to touch !! and this is the first time that it has overflowed to this level of overflow when i stopped the engine ! and i hear a bubbling from the engine long after the engine is turned off ! if I unscrew the top hose a little (radiator to thermostat) > PSCHITTTTTTTTTTT SO a lot of pressure > It's a real shame because I've made good progress on the rest of the vehicle (brakes, interior, electricity, etc.)

INFORMATION : I don't have any white smoke coming out of the exhaust -------> Otherwise, is it common for the cylinder heads to deform on this type of engine 425 ? and i will test : engine off >small draining of oil pan to see -->oil quality (thanks emtee) I verified : no problem > sparks analyse engine on >radiator cap opened 1>I was told to put a condom at the radiator outlet instead of the cap; if it swells it's the cylinder head or its gasket! 2>--->see circulation in radiator---> see bubbles in radiator

yes i will drain a small no i don't know anyone to analyser gas

yes hot just sitting driving on the road < no testing sorry

YES for the o ring when i have opened the top of engine before the Buick restarted last year and i put new head gaskets recently changed parts : -the climate evaporator -add water valve on the water manifold for climate I don't know if the engine was heating up before this change. test : I will remove the thermostat from the circuit, this way the water will circulate everywhere and see if it continues to heat up but i think that i have already done this test > how to be sure that it is not the cylinder head or its gasket ? > HERE I was told to put a condom at the radiator outlet instead of the cap; if it swells it's the cylinder head or its gasket!

ALL <<< thank you for your support and your help ❤️

I suspect more and more deformed cylinder head !!!! If it is exact it's another story in terms of price!!!! I'm really on the verge of abandoning the renovation and sacrificing the car 😪

no sorry but it is very hot because the radiator cover is hot !!!

in this way i tested the thermostat in saucepan filled with water and it opens when hot water and the first leak (before huge overflow by radiator cap ) is shown on the picture

thanks no this is a 425 I have tested the flow in the radiator many times and it circulates

Bad news for me : my engine It is overheating ! It is starting leaks on the water manifold and after through the hose of radiateur cap ! I am very sad All is new : water pump, thermostat, fluid....

Very good information Thanks !!!

It is a good news !! So the unleaded petrol AS SP98 in France can be used without additif ?

Read in France for recession of valve seats :🗯️ "The experience of some always benefits others, it is good to remember that the Americans stopped all trade in leaded gasoline in the 1970s, imitated immediately by the Japanese. Did they experience an epidemic of recession of valve seats ? No, and all the surveys carried out since then show that there were no more mechanical incidents after the switch to lead-free than before. And they specify that valve seat recession has always existed, that cast iron cylinder heads without added seats are, as before, the most exposed to this “natural” phenomenon, that aluminum cylinder heads with added seats are less sensitive to it, like before. Most “serious” professionals have since come around to this opinion and no longer recommend the systematic replacement of valve seats with “reinforced steel valve seats”. The latter obviously do not exist, even if we can, by playing with words, say that indeed the material used today is undoubtedly of better quality than 30 years ago... CONCLUSION We recommend to check valve clearance regularly (every 5000 km) and if you notice that your clearance is regularly decreasing, change them. Before, it's useless. That said, if you have a car with a cast iron cylinder head in which the valve seats are not attached, and if you do more than 10,000 km per year, you will have every interest in having steel seats inserted. You will make your vehicle last longer. cylinder head longer. But this is not new, it is an operation which has always been practiced by rectifiers..."

AND for LEAD additive ? I have the impression that this is not useful if you don't drive the car much and the risk of deterioration of the valve seats is very limited. 🙄

see my precedent post : L’indice anti-cliquetis AKI (Anti Knock Index) ou indice anti-récession des soupape (ARS) est la moyenne des deux précédents : AKI = ( RON + MON ) / 2

In France you have SP98 (MON 88) or SP95 (MON 86) or SP95-E10 (=SP95 + 10%ethanol)

I have felpro HS7922-PT1 (materiau PermaTorque) for head gaskets.

yes my engine run very well with sp98 with additive to protect valve seats ??!!🙄

L’indice anti-cliquetis AKI (Anti Knock Index) ou indice anti-récession des soupape (ARS) est la moyenne des deux précédents : AKI = ( RON + MON ) / 2 EN FRANCAIS : L’indice recherche RON correspond à une simulation à bas régime (600 tr/mn), l’indice moteur MON à régime plus élevé (900 tr/min). En Europe c’est l’indice RON qui est indiqué. C’est l'AKI qui est utilisé aux USA et Canada. "The RON search index corresponds to a simulation at low speed (600 rpm), the MON engine index at higher speed (900 rpm). In Europe, the RON index is indicated. It is the AKI which is used in the USA and Canada."

What fuel do you put in your car please ? And what do you think about the lack of valve lubrification ? 🤔

ok 32 psi or 2.2 bar is the average value😙

the octogonal original key opens doors and starts engine