What to do with my 1.7 F2N?

[tanago]

Car is '85 R11 Txe, 200k kms

• the other day I measured the compression - 16 psi, manuals say compression should be 10:1 which is 14.7 psi - mine is too high so oil is in the cylinders
• Valve clearance is too tight too ~ 0.35mm for all exhaust and 2 intake have 0.15mm so valves will need to be readjusted.

The Head will need some work, thats 100%.
My questions for the experts are:

1. what usually goes bad for F2N? Valve seals or piston rings?
2. should I also rebuild the Block - how piston rings and crankshaft+piston bearings hold up?
3. while doing the valves clearance is it good idea to make the valve seats too?

FRENCH GOOGLE TRANSLATE

La voiture est '85 R11 Txe, 200 000 kms

• l'autre jour, j'ai mesuré la compression - 16 psi, les manuels disent que la compression devrait être de 10: 1, soit 14,7 psi - la mienne est trop élevée donc l'huile est dans les cylindres
• Le jeu des soupapes est trop serré trop ~ 0,35 mm pour tous les échappements et 2 admission ont 0,15 mm donc les soupapes devront être réajustées.

La tête aura besoin de quelques travaux, c'est à 100%.
Mes questions pour les experts sont:

1. Qu'est-ce qui ne va généralement pas avec F2N? Joints de soupape ou segments de piston?
2. Dois-je également reconstruire le bloc - comment les segments de piston et le vilebrequin + les roulements de piston résistent?
3. en faisant le jeu des soupapes, est-ce une bonne idée de faire aussi les sièges de soupapes?

[AStech]

Hello tanago,

It's surprising you regret too high a compression in the cylinders, because with 200 000 km, the problem is often low compression. Do the four cylinders have the same compression ? It's important to have a good balance.

Why would you like to rebuild your engine if it seems to have good parameters ? The frequent and obvious problem with F2N is the carburetor. You haven't any problem on this side ?

[tanago]

well, one of the problems is that the oil canister fills my air filter box with oil and I think it's because of the high compression. The compression is almost equal for each cylinder

[AStech]

Equal compression for each cylinder is a good point. Air filter spoilt with oil is usual for such a generation of cars. It happens when you drive for a while with high rpm. It is the reason why it is useful to replace regularly the air filter. Be happy with high compression, it means that your engine is young :-)

[tanago]

Update:

Head is completely refurbished and like brand new!
Cylinders have wear 0.07-0.11mm
Pistons have wear 0.01-0.03mm

The worst piston-to-wall clearance (cylinder and piston #4) is 0.17mm, factory is 0.05mm

The piston rings grooves looks worn too.

I think about just finishing the cylinders with crosshatch pattern, fitting new piston rings and assembling, any other suggestions?