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Author Topic: head removal  (Read 429 times)
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cods68
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« on: March 26, 2011, 08:54:25 AM »

hi guys head gasket gone on my 97 previa .....after getting a few �1000 quotes and a few laughs from garages ... i decidered to have a go myself i have a little experienece ...ive lowered engine removed trimmings
following the chilton manual ... ive come to the dizzy it says  matchmark and remove in that section .....but in the dizzy removal section its says get cylinder 1 to tdc before markng and removal ... just checking if this is correct as on camshafts i have to turn those before removing them Sad so i thinking this is going to disturb the timing .... hoping to get it off this wknd any help would be great Smiley
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ADarbon
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« Reply #1 on: March 26, 2011, 10:38:53 AM »

i am assuming its a petrol you have.
on the deisel 3cte the line on the cam will is too point down to remove the vac pump the up inline with the rocker gaskit to remove the belt. this will make it easier for getting the timing because every thing else will be already in position.
Propnut is usually the best for answers for the petrol engine.
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Tony the family guy
cods68
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« Reply #2 on: March 26, 2011, 11:18:03 AM »

yeah its petrol i got the rocker cover off ... only i got to do is the dizy and the cams Smiley but was wondering if i have to set the dizzy to 1 tdc before match marking it as it says in the manual i have to move cams to get them out which i would think it would move the timing  Huh?
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ADarbon
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« Reply #3 on: March 26, 2011, 11:37:23 AM »

wish I could help more on this one. hopefully someone will be on soon that can help If you cant wait phone Gary at GT Motors he should be able to give you the advice you need.
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Tony the family guy
cods68
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« Reply #4 on: March 26, 2011, 12:07:27 PM »

cool thanks i still trying to suss it out lol need skeleton hands for this job  Cry but getting there slowly ... slow and steady wins the race as they say LOL
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Kernowman
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« Reply #5 on: March 26, 2011, 07:21:01 PM »

Normally you set No1 to TDC and that's your timing mark for everything.... petrol or diesel.
If you have CAMS I take it yours is a twin cam ?

If mark both cam pulleys when at tdc, it will make refitting easier.
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cods68
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« Reply #6 on: March 28, 2011, 11:51:58 AM »

cool thanks i did mark at tdc in the end Smiley was hoping the have the head off at the wknd but blimey you need to be harry potter to get to half the bolts   Undecided  still cant get inlet man off  or the water inlet .... gave up now for the wk .... give my skin time to heal over  Grin .... any ideas about gettin inlet man off be great i undone the bolts to the head and the strut 1s to the left hand side the man seal cracked but cant left it enough to clear bolts  Huh?
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cods68
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« Reply #7 on: April 02, 2011, 11:00:10 AM »

ive just removed cams in the man it says remove cam shims and and lifters ,shims just slide off but i cant work out how to take the lifters out it dosent say in manual any help would be great  Undecided and do i have to take all them out only shows the 1st 2 in manual Huh? many thanks  
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cods68
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« Reply #8 on: April 02, 2011, 03:35:12 PM »

sussed it out guys head is finally off ....  Grin ... just got to get it pressure tested and hopefully its not cracked ..... then hopefully be putting it back together in a couple of weeks .... hope that be easier lol .... i"ll keep ya updated thanks for all help so far  Grin
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cods68
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« Reply #9 on: April 20, 2011, 07:46:46 AM »

Hi guys finally got the bus back on the road . Was a lot easier putting it back together lol . All seams to be running fine . Just sounds a little tapperty :\ . At a cost of approx �350 so not to bad that's including oils and dizzy cap and rota plugs and also gained a few tools along the way Smiley .
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« Reply #10 on: April 20, 2011, 08:00:02 AM »

Excellent news, good to hear you'r up and running again. Never attempted much on a Previa myself but there doesn't seem to be much in the way of space to work on stuff.
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Kernowman
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« Reply #11 on: April 20, 2011, 02:16:42 PM »

Previa definately has more room around engine and under bonnet then the Estima... so should mean fewer cut knuckles  ..lol  Tongue
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« Reply #12 on: April 20, 2011, 05:29:08 PM »

Lol don't know about the knuckles I lost mine need be harry potter to get to half the nuts and bolts lol
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