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[Solved] Peugeot 1.6 HDI Engine: Leaking Cylinder Head & Camshaft Cover - How to Seal with Erling EL 035971

Daro122 42234 18
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How can I seal the leak between the cylinder head and camshaft cover at the rear of a Peugeot 1.6 HDi engine without machining the head, and what sealant can tolerate a larger gap?

The rear head/cam cover joint on the 1.6 HDi is often not fixed by choosing a stronger sealant alone; if oil is escaping there, the first thing to check is crankcase pressure, because excess pressure will push oil past the seal and no silicone will hold [#17584243][#16442295] At idle, remove the oil filler cap: if it only lightly vibrates, pressure is likely OK, but strong pulsing/blowing points to worn piston rings, a blocked breather/ventilation issue, or another crankcase-pressure fault [#17584243][#16442295] One reply also notes that in the exact rear spot discussed, there is no separate gasket [#16442966] If the engine is otherwise sound, users reported success with proper sealing compounds rather than cheap silicones, including Toyota black silicone, Reinz sealing compound, Loctite Form-A-Gasket No. 1, or an anaerobic Erling-type product said to level unevenness up to about 0.3 mm [#16436760][#16436838][#16437438][#16436943][#16443118]
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  • #1 16436681
    Daro122
    Level 31  
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    The problem concerns the 1.6 hdi engine and the leak between the cylinder head and the camshaft cover at the rear of the engine over the egr valve. The first thousand engines that I made in my life, I glued to the hermetic, now I use a similar preparation Erling EL 035971. The problem is caused, of course, the lack of flatness, the repair requires a photo of the head, which I would like to avoid. What means do you use that could be checked in a larger gap.
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  • #2 16436760
    moto-kord
    Level 28  
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    A colleague brings me the original silicone from Toyota black I use it in the vag group, dog
    it has not let me down yet.
  • #3 16436838
    bryka102
    Level 11  
    Posts: 8
    Rate: 4
    I use Reinz sealing compound in such a "spray", something like silicone, but decent.
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  • #4 16436943
    Daro122
    Level 31  
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    You can have some numbers of these specs, I found something like an anerobic adhesive ELR ELR 777.790 a bit expensive but it will be cheaper as you undress it once again.
  • #5 16437438
    jerry1960
    Level 37  
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    Try the Loctite agent "Form-A-Gasket No. 1
  • #6 16442295
    g107r
    Level 41  
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    Daro122 wrote:
    The problem is, of course, due to the lack of flatness of the surface
    Sometimes a poor quality gasket, at home I changed the gaskets twice, gluing on good silicones, and the problem was solved after applying the erling gasket, not from some bushes companies. And as much as the flatness of the head or lid. After three years, she began to sweat, but supports the second engine :) earlier, the "bushes" lasted up to 3 months, and again there was a liquid.
  • #7 16442966
    moto-kord
    Level 28  
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    g107r wrote:
    Daro122 wrote:
    The problem is, of course, due to the lack of flatness of the surface
    Sometimes a poor quality gasket. And as much as the flatness of the head or lid.

    In this place where the colleague Daro 122 described, the gasket does not exist.
  • #8 16443118
    Daro122
    Level 31  
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    It's like a friend of a moto-kord. When I bought a car it was made for silicone, I corrected Erling's formula similar to hermetic, now I would like to try something new I think about the already mentioned Erling preparation on the bass of an anaerobic adhesive due to the leveling of unevenness up to 0.3 mm. Tomorrow, I work, hopefully it will not break any material.
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  • #9 16443204
    moto-kord
    Level 28  
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    Daro122 wrote:
    Tomorrow, I work, hopefully it will not break any material.

    I will not wish you good luck.
  • #10 16550732
    Daro122
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    Hello, I glued the month well, no leakage, now the entire back of the engine flooded. But I have another problem on my head, the oil leak from the turbocharger. The compressor is after professional regeneration on melett parts, there is power and even more than before regeneration, I gave the compressor for complaints and zonk because the compressor checked and good. Auto is Peugeot 407 1.6 hdi 110 Km, after removing the air filter - turbo, you can see that there is oil. Replaced valve cover - from it comes the pneumothorax tube, without changes, just 3 km and you can feel the oil burning. I understand that there is an exchange of rings waiting for me, or maybe there is some kind of econect that I do not know about.
  • #11 16550835
    domex32
    VIP Meritorious for electroda.pl  
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    If you changed the throttle and it did not give it means that there is too much pressure in the crankcase, possibly you have a poor quality or a dirty air filter.
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  • #12 16550869
    Daro122
    Level 31  
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    The air filter has recently been replaced, after removing the cork, something flies, but not much. Lifting versions have a solenoid valve added, as far as I know before, they dirty a little turbo with oil.
  • #13 16550877
    T5
    Admin of Cars group  
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    Daro122 wrote:
    Lifting versions have a solenoid valve added

    Is a solenoid or heater?
  • #14 16550891
    moto-kord
    Level 28  
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    How many kilometers have you traveled that you want to exchange rings?
  • #15 16550941
    Daro122
    Level 31  
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    It looks like a solenoid valve, I do not have it in my motor (no plug) and I have nowhere to check. As for the course, it is 207,000 on the counter.
  • #16 16551004
    moto-kord
    Level 28  
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    Have you checked the compression?
  • #17 16551091
    Daro122
    Level 31  
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    I did not check the compression, there is no power, no injection corrections -0.2 to +02, touch toes, there were no turbine oil leaks before the turbo repair. Noticeably, there is more power and more blows to the crankcase and oil in the dump.
  • #18 17584243
    kamilbalut
    Level 11  
    Posts: 19
    Rate: 5
    I know that the topic is annual ...
    In place of the cover, a gasket is provided in its grooves. Such a rubber slightly pulling and it is enough if everything is ok with the engine.
    However, if the oil gets out that way it means that there is high pressure in the crankcase. And no gluing with silicone. You have put the lid on the pressure, the oil has been stuffed somewhere in the back and the compressor. From what I have heard, the reason may be sealed rings on the pistons, something wrong with the acetules or clogged pneumothorax. The pressure can be roughly checked with an oil stopper. Idling engine, unscrew the stopper and if you lightly telepie it is all ok.
  • #19 17584323
    Daro122
    Level 31  
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    I managed somehow, some leaks under the cover, a little overpressure in the gearbox, the rides are overcome.
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Topic summary

✨ The discussion revolves around addressing a leak between the cylinder head and camshaft cover of the Peugeot 1.6 HDI engine, particularly over the EGR valve. Users share various sealing solutions, including the use of Erling EL 035971, Toyota black silicone, Reinz sealing compound, and Loctite Form-A-Gasket No. 1. Concerns about the flatness of the surfaces and the quality of gaskets are highlighted, with some users reporting successful repairs using high-quality silicones. Additionally, a follow-up issue regarding oil leaks from the turbocharger is discussed, with suggestions to check for crankcase pressure and potential piston ring issues.
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