head gasket and engine power loss

[deathqs]

hey,is there any difference between 1128cc and 1108cc head gasket?And what could be the cause of power loss,i had checked the compresion and average is 13bar.and there's somekinda mystery the fuel somehow mixes with oil but i cant understand how,if it be bad rings it would smoke wright? here's how she looks

 

[angel]

There is no 1128cc engine, "1128" is vehicle type code for cars with 1108cc engine.

13 bars is an excellent figure for compression pressure, don't bother with head gasket or piston rings, it's definitely not from there.

If you find fuel in the sump, there are two reasons: leaking fuel pump or very rich mixture. Both of them could affect engine performance, too.

 

[deathqs]

is there any way to check if fuel pump is leaking besides cheking the membrane?and how to make it leaner?

 

[robbie]

it seems strange to me you have got fuel mixing with oil and loss of power
if you have no smoke its not rings.
have you checked the manifold gasket, some time the nuts work off so ther are missing or loose, this will give you power loss, the other is carb flooding
years ago Renault had a mod to assist in fuel going back to take on a return system is this working ok?
hope this helps you
robert

 

[deathqs]

made new manifold gasket few months ago,didnt helped,and there's no return line on mine.

 

[deathqs]

angel was wright its fuel pump,what material i could use to make diaphragm?

 

[angel]

Industrial or marine hardware shops carry special "diaphragm rubber" sheets in various thicknesses. Make sure it's compatible with petrol.
Otherwise, get a new fuel pump.