Windle

over reved series 2 last night wrong gear dropped to around 2 cylinders i think and limped it home was only round the corner!

Just took rocker cover off to see any tell tale signs, i found a very thin coil spring no wider then a few mm this was floating in the head!. One of the hydrolic lifters looks a bit suss in shape

i presume i have bent a valve or 2 but is there anyway to check before i take it all apart. I do have access to a compressor can i blow presure in via the plug hole to see if its sealing perhaps ?

if not i will re asemble and borrow a compression tester see the score ?

cheers

Windle

got a compression tester but oddly not 1 cylinder is reading any pressure ! have i done it proper and killed all 8 valves

scoooby slayer

iTrader: (4)

if you limped home mate you definitely havnt done all 8 valves as the car would of stopped dead and not run at all. maybe youve got a shit comp tester ? try another comp tester you must have compression on some of them ? if memory serves me right cvhs have got rocker arms from hyd tappet over to valve check if any of these have broken. i know the old bm e30s are prone for breaking the rocker arms.

scoooby slayer

iTrader: (4)

forgot to say it you wana check for compression take one plug out and turn it over and it will chuff if its got compression. do this one by one so only one plug is removed each time and you should hear if theyve got compression.

Windle

hey mate, compression tester is a mates we have recentely used it on his mr2 turbo and seams fine. I alos blew the compressor through it to test it worked and it read 6 bar and held it perfectley

i have all plugs out at the min and there is deffo no chuff. The compression tester only starts at 4 bar i think it was so maybe i am seeing less than this but not zero ? car only just got home it didn;t drie very well at all lol

Glenn_

iTrader: (1)

For what it takes 2 take the head of u might as well just whip the head off n have a look. I just hope u havent done anymore damage like cracked the valve guides or damaged the pistons.

SafeChav

So does it still run?

Windle

i havent tried the car since, but it did drive home and oddley seamed to be much better as it struggled and came on boost

there is deffo no or very little compression so going to take the head off tonight or over the weekend for a nosey.

Its a big valve head too are the valves dear

can i just buy the valves or should be be fitted by the engine shop i used ?

cheers

Windle

ok head is off and oddly nothing looks a miss pistons dont look to have a mark on them ! 2 of the valves look to have hit something but i mave just caught it as i took it off uploading pics now

Windle

Windle

can you actually check the pistons and head whilst like this? to see if the leak or is it a pressure test job

SafeChav

I can't work this out.

Theres no way you caused that level of damage to valves by removing a head, they are mashed up to fuck.

Yet you say theres not a mark on that piston?

Windle

me either mate deffo was only just running, compression test revealed 0 compression yet their doesnt look to be any damage

i think i will drop the head off for a pressure check anyway see what they make of it. Nothing else can cause 0 compression can it ?

can damaged lifters cause compression problems maybe they took the impact :S

Hank Moody

turn the head upside down and make sure all the valves are closed

pour thinners or petrol if you have no thinners into the four holes and leave it for a while, wen you come back if the petrol has dissapeared you have a valve problem

ie they are leaking

bit of grinding paste should solve this and re seat them

davsmith64

needs more than grinding paste mate,, without a doubt the valves are bent!! theyve took a right smack!!
you can see this in the pics.

new valve are needed,,

Windle

pretty sure at least one is bent. Just turned th ehead to see if valve at least looked like they were sealing. 1 is deffo a good 1mm out from sealing, so ovb fault there. Not sure about the rest, better to get this check by the engine shop as head will need pressure testing anyway befroe it goes back on?

its a big valve head but i cant find any paper work from when i had the head done to check valves sizes here is a few more pics

The suspect valve on 1 looks to have dumped oil ? petrol ? back up the inlet, the other 3 look fine



pics are very blurry sorry !

rigwrecker

i bent 1 valve on a cvh before sorted that and about 3 days later lost power again took off rocker cover off ,the rocker on that valve was loose tightned it up again went another couple o days same thing so in to the local ford dealership it went tuned out when i bent the valve the threaded bolt that holds on the rocker had bent slightly as well got that sorted she ran sweet as after that

Windle

engine shop just rang

7 bent valves, 1 exhaust thread needs recoiling and a crack in chamber 2 between both valves he said it isn't leaking but may do in the future so go ahead with that too least i did it proper

Ł298 + vat for all the work plus 7 big valves whoops on a plus side, my mates compression tester clearly works fine

davsmith64

not good at all mate.lol

so u having it repaired even with the hairline crack?? it may not be leaking now while the head is cold but with how hot a cvh engine runs at it may well expand..

but thats your call...

Windle

as above, i have given go ahead to have it re welded, may as well whilst its off ! what would cause the crack in the first place, got too hot ?

SafeChav

Personally mate i'd start again with another head, for the price of a CVH head, you could probably have the new head made to the same spec as the current for the same sort of price.

Windle

dont say that it cost me a fortune many years ago it was a stage 4 big valve head, all porting polishing etc was done and with flowed manifolds to match

ps answer you pm safe chav

Windle

picked head up yesterday













looks much better

he informed me what i had suspected, cam was worn and lifter number 1 had worn with it. So i have just ordered a newman cam and solid lifters with APT

newman have none left so are going to try and grind one and get it out to me for the weekend

Windle

well after a while she's up and running took her first stpes today to run the cam in thanks to christian at APT for the cam kit and advice

quick vid on fast idle to bed cam in

http://smg.photobucket.com/albums/v4...9082007005.flv