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I supported Toymods
Location:
Berowra-Sydney
Registered:
July 2002
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Replacing Valve springs or just get a new head?
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Wed, 07 May 2003 12:37
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ok does anyone know how to change valve springs without droping a valve into the cylinder? if the only option is to take the head off then i will go to pan B and get a head from a wreckers get it ported polished and everything done then just wap heads over,
A is a much cheaper option and gets me out of making myself spending heaps more money so can anyone help me? 
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: Replacing Valve springs or just get a new head?
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Wed, 07 May 2003 13:22
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Remove spark plugs. Turn crank so that cylinder you wish to work on is at top dead centre compression. Using your air compressor and spark plug fitting, pump cylinder full of compressed air. Using a top acting valve spring compressor, compress spring, remove collets, retainer and spring. For reassembly, reverse order. Repeat for subsequent cylinders.
I presume you are talking about your 18RC. Things like 7MGE/2JZGE have the valve springs located in a bore so it is impossible to change springs without taking the head off.
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: Replacing Valve springs or just get a new head?
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Wed, 07 May 2003 13:28
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i think he is talking about his daihatsu - since his RA23 is now parked in the Pick and Payless garage....
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Location:
MACKAY
Registered:
May 2002
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Re: Replacing Valve springs or just get a new head?
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Wed, 07 May 2003 13:31
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Make up a adapter to screw into the plug hole so you can connect a air hose to it then turn the motor to top dead center of the cylinder you are going to remove the springs on , turn the air on and with a spring compressor remove and replace the springs ( you can bye a cheap spring compressor for this purpose )But if it's a twin cam head you will have to make a tool to compress the springs .
Trevor
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: Replacing Valve springs or just get a new head?
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Wed, 07 May 2003 13:45
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another way to do it is to get rope and keep stuffing it into the spark plug hole until you can't push the valves in (at TDC of course, or just before TDC and then turn to TDC...
have done this to a datto L16 and my toyota K engine.... works well  , just make sure the valves can't go in before you take off the springs...
Cya, Stewart
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I supported Toymods
Location:
Berowra-Sydney
Registered:
July 2002
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Re: Replacing Valve springs or just get a new head?
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Wed, 07 May 2003 22:35
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i wish it was the 18-RC that way i wouldn't have as many to do,
nope its a Charade engine SOHC and 16 valve,
i will enquire about the tools
it doesn't sound like a quick process 
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: Replacing Valve springs or just get a new head?
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Wed, 07 May 2003 22:49
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Couple of hours will have it done. Unfortunately not the sort of thing you can get your mates to come over and partake in beer with....I mean help you.
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