Maxxeh

Hi, just got the car setup and was running great.

However today i was giving it some and as i was changing gear, i beieve i changed it back into 2nd after redlining it in 3rd and there was a bang and as i stopped it she died. pushed it to the side and as i tried to strart it it was coughing or spluttering and wudnt start.

please help....

rs_cabby

are there any holes in your block, i done the
same thing once and it spat a conrod through the
side of the block, the cambelt also jumped and
bent a few of my valves and beat the tops of the
pistons quite badly
the only thing you can do really is check the engine
over for obvious signs of damage and maybe do a
compression test on all the cylinders,failing that
you will probably have to strip it down for further
inspection.
hope its nothing too serious mate.

iansoutham

Sorry, sounds like a lot of bent valves TBH. Best bet would be a compression check, which I suspect will come up as no pressure. Then a head-off job and a THOROUGH check of everything for damage, no matter how minor.
Make sure you put a new belt AND tensioner back on afterwards though, no matter what.

turbo.jon

does sound like bent valves i no as done same with mine id only had car a few days too

Maxxeh

If the valves are bent... how would i know and would this mean the entire head is fooked?

pugo

well first off, is the cambelt still on it ? is it still timed correctly ?

Maxxeh

yea the cambelt was on properly. When i took the head off i cudnt turn the camshaft.

pugo

and it was still timed up properly or had it jumped teeth,??? as it sounds like if the camshaft is solid that it has jumped teeth and bent some valves or possibly snapped the camshaft

iansoutham

@ Maxxeh: How did you try and turn the camshaft? By hand? Socket? The camshaft will be able to turn, or you would have stripped all the teeth on the belt when it went as the engine would have had drive still from the wheels.

If you turn the head upside down, you will see that all the valves are not quite in line with their respective holes. You need to remove each valve in turn and with a new valve, see how easy it drops in the guide hole. If it is easy, chances are the guides are okay, if it sticks, might as well throw the head as it'd be cheaper to replace than repair. Look @ each piston in turn and see which ones have marks in them from valve contact. It will be reasonably obvious, a 1/2 inch line max., slightly curved on the outer 1/4 of each piston, possibly 2 per piston if all 8 valves have touched.

Personally, I'd buy 8 new valves, even if only 4 are bent (it ain't worth the risk of a valve head dropping later under power), new set of stem seals, check the cam for significant damage and try a rebuild.

Maxxeh

right, i can confirm that the valves are bent. will the camshaft still be o.k?

im going to stick the old head back on. so that should sort that problem out. However, i got a dent on each piston, where the valve may of hit. wil it still be o.k to use pistons?

Cheers.

antony215

Cam will be fine. As for the pistons it all depends on how bad the dents are??

Maxxeh

there is a dent on all pistons but not too much.

105epwr

i did the same thing but went from red line in 2nd back into 1st,i did the head, valves and cracked the valve guides...also i chipped teeth on my pinion shaft in the g/box so be sus!

gambit

I reckon the box would have gone iswell I SEEN IT TOO MANY TIMES