1999 (V-Reg) Banana Engine into 1997 (R-Reg) Van???

[Guy88]

excessive crankcase pressure in an engine can be a few things, head gasket leaking from a cylinder to an oil channel, worn rings/bores, cracked piston

We are on the same lines then. i think our MK5 has a cracked piston . Had a new headgasket and no wear in the bores

[gemini]

how bad is it guy, the last one i repaired was like a steam train when the oil filler cap was removed, only 1 piston was cracked, the others were fine

[Guy88]

Doesth smoke but there is a lot of pressure and no power

[gemini]

Doesth smoke but there is a lot of pressure and no power

have you compression tested the cylinders, if not i would do this first

[Guy88]

Had it done. no 1&2 were low. done the headgasket and still no different

[gemini]

Had it done. no 1&2 were low. done the headgasket and still no different

how low

[Guy88]

Compressions were:
Cylinder 1 - 26 bar
Cylinder 2 - 28 bar
Cylinder 3 - 36 bar
Cylinder 4 - 37 bar


This was befor the headgasket

[gemini]

Compressions were:
Cylinder 1 - 26 bar
Cylinder 2 - 28 bar
Cylinder 3 - 36 bar
Cylinder 4 - 37 bar


This was befor the headgasket

is that the dry test result, did you try it with a drop of oil as well

[tractive-effort]

Seemed to have opened a can of worms there.....oops!

Anyway, mine had a brand new Ford head gasket on it about 3 months back - the oil consumption was excessive prior to this and was just the same after the gasket was fitted. I noted the bores were glazed when the head was off, which would suggest excessive cylinder wear.

I should of perhaps changed the engine, but at the time couldn't find a decent one, so just changed the gasket and carried on with it. There is a lot of vapour that is exhausted from the crankcase through the dipstick tube as I said. Don't know bout the filler cap though, will check that later. Defo think it's rings/bores with mine, though it doesn't really matter now I guess..

[Guy88]

Didnt have a chance to try with oil

[gemini]

Didnt have a chance to try with oil

try it first and see if the pressure rises which indicates gasses getting by the rings, also it should get up to pressure quickly

[madmark]

what oil is in the engine that is breathing?????i have had it before were a di is breathing as the oil hasnt been changed for sometime ! put a decent oil in like 15/40 this will stop it! most di engines will fume from the rocker cover if they are running on crap or expired oil!

these are my views and belive me i have had a few di engines!

[tractive-effort]

Mine really is fooked though believe me! I've had everything in the sump from Mobil 1 to the cheaper Magnatec 10/40, 15/40 and super cheap 20/50 type stuff and it's still the same - consumption, vapour etc.. I had the van fully loaded this morning and it pushed out quite a bit of white/blue smoke for once, so definately worn bores/rings me thinks..

[madmark]

she does sound nackard!