Just wondering if its an absolute necessity for the mechanic to remove the head in order to install valvesprings?
is it possible to install while the head is still on
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Just wondering if its an absolute necessity for the mechanic to remove the head in order to install valvesprings?
is it possible to install while the head is still on
yes otherwise you will have valves falling into your cyclinders.
You don't have to have the head removed. Rotate each piston to tdc when doing the corresponding valvesprings. I had ctr cams installed and my head wasn't removed...
Correct, we did the Turbo EM1 (feature car) this way.Quote:
Originally Posted by pillow
It gets VERY tiresome, especially when installing dual springs, i dont recommend it.
excellent...thanks for that guys
i dont want to remove my head for a few reasons
1. new headgakset
2. with head removed i'd be pressured to do a pnp
3. with head removed i'd be obliged to rebuild botom end
is it the same amount of time involved with doing it with the head on?
and also if a valve does drop... does htat mean off comes the head or can u pick it back up?
you can also use compressed air or rope inside the combustion chamber to hold the valves closed.
u ugys are all legends :)
yep. compressed air. they make adapters that screw into the plug holes.
I'va heard of using compressed air but never knew how it was done, cheers for the info:thumbsup:Quote:
Originally Posted by Weq
rope is easyer and simpler,
less farting around and lees posibility of some thing going wrong.
like proecu says, double row valve springs will take time, but I have done heaps of single row springs and valve srem seals useing the rope method. Id much rather do that even if it takes longer to do than taking a head of for no reason. its all about cost.
even if the head was off, its still a pain in the ass to change springs on some heads.
btw - a good source of 'rope' is a used/dead octopus strap, just cut the end and melt it with a lighter...
whats the rope method?
rope methos is when you take out your spark plugs and turn your engine to BDC, put rope down the bore, about 1 meter and gently turn your crank till your piston pushes the rope up against the head holding the valves in place.
ideal is to have 1/4 to half a bore full of rope, when you undo the spring retainer, grab tghe valve and make sure it wont move down into the block ( just to be sure )
thats it.
Thats very interesting. Thanks for that. Simple yet effective. :thumbsup:Quote:
Originally Posted by ECU-MAN
it is also a good method for locking the crank to remove the crank pulley bolt or the flywheel bolts.
i use it all the time, but others suggest it might damage internals (never has for me)
How does this rope trick stop the crank from moving? Not too sure on what you meanQuote:
Originally Posted by tinkerbell
The piston will be forced against the rope which is against the head, hence the crank will be fixed enableing you to undo the bolts.Quote:
Originally Posted by wynode
Probably best done on the compression stroke?
Oh yeah of course lol
+rep for you!
Aww thanks man. :DQuote:
Originally Posted by wynode
Hahah,
DLOO1 gets a belly scratch, but yeah, great posts guys, very informative!
so can i just clarify thisQuote:
Originally Posted by DLO01
the rope will be pushed up onto the head by the piston and hence the crank wont turn anymore on the compression stroke...
thefore if i keep turning the crank bolt (anti-clockwise) it should snap the crankbolt off?
will the cause any damage to the valves/head at all?
Snap the crankbolt off?Quote:
Originally Posted by michael_antoi
Depending if you want to lossen or tighten the crank pully bolt or flywheel bolts, will depend on which way the engine is turning, ie forward toward TDC or reverse toward TDC. I am not sure which way is which. Do you get my drift?
As for causing stress, like tinkerbell said, I think its up for argument, but he has never had a problem with it.
sorry i meant to loosen the crank bolt....this method would work fine?
yeh just afraid to damage any valves etc...
the valve should be closed at the top of the stroke
ok i'm gonna go try it now....
wish me luck
lol
good luck