i have a c20xe which has done 146k...the top end looks like it has been refurbished quite recently and very clean so i want to leave this intact. while the engine is out i want to replace sump gaskets, crank seals and water pump, belt and check big ends.....my q is, is there any thing else i should do while i'm at it? is it worth taking oil pump off to check and maybe renew? is it worth checking main bearings too? i dont want to take pistons out or remove crank if possible...any advice/hints/tips would be appreciated.....also, for some reason there was no inlet or exhaust gasket in place...just red sealer on the inlet, and exhaust paste on the outlet..is this common practice?
If your gonna be taking the big end shells out and you're not removing the crankshaft, you may as well fit new shells (of the correct size - be carefull) in their place! In an ideal world, the crank would come out to check for ovality and scoring........ but I can understand why you don't want to.
Mains are usually fine.
Don't worry about the lack of gaskets - your top end set will have them there anyway.
I must say though, at 146k it will have worn rings and oil consumption may be a problem..
i can replace the big ends without removing crank yeah? i have new std shells to go in....it will be obvious if they r wrong size when i get old ones out wont it?
i want to keep costs down, so dont want to replace mains unless absolutely neccessary....and if i do rings, probably need rebore as well so have to draw line somewhere! what about oil pump....they dont really give trouble do they?
Nope, leaving the crank in place is fine - you'll need to undo the two (13mm IIRC) bolts that hold the conrod to it's end cap. Then slide the piston upwards and you can remove the shells.
I think the size (or oversize) is stamped on the underside of the shells.
I wouldn't disturb the mains TBH. Especially if the B/E's are ok. They don't generally wear much. It's also hassel getting the main caps off.
I presume you're changing the oil pump gasket? It's recommended as the gasket is often leaking and Vaux now supply a metal one which is a much better idea. If you're on a tight budget, don't bother replacing the pump unless it's scored or has noticeable wear.
i have a paper pump gasket in the sump set... it doesnt appear to be leaking but maybe best to replace, how much do vauxhall want 4 a metal one? when replacing big ends, is it ok to reuse the bols? is it ok to reuse flywheel bolts to if cleaned and threadlocked?
i have a paper pump gasket in the sump set... it doesnt appear to be leaking but maybe best to replace, how much do vauxhall want 4 a metal one? when replacing big ends, is it ok to reuse the bolts? is it ok to reuse flywheel bolts to if cleaned and threadlocked?