Author Topic: engine rebuild pics here as of saturday!!!  (Read 3527 times)

kniterider

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engine rebuild pics here as of saturday!!!
« on: 07 May 2004, 07:30 »
ello peeps, as off saturday (when i start rebuilding the 20v engine) ill be postin pics up here and in vw chat for you lot to see that the mk4 engines (20v turbo/non turbo) arent as scarey as they look!! there is common faults which occur on these engine if not looked into closely, so this thread my be of use to all 20v owners!!,

right the reason why im rebuilding mine, is because the cambelt tensioner failed, which resulted in the tensioner letting go of the belt and the valves hittin the pistons!!, so along with the belt and tensioner ive also got the following parts to renew

cylinder head (complete from 19,000 mile car)
head gasket
head bolts
water pump (known to fail at around 80k miles, mine has small cracks so replacing now for modified version)
secondary roller on timing belt (as bearing collapsed)
oil
oil filter
coolant
and a selection of jubilee clips etc

im gonna take a series of pics as i rebuild as i thought it may be of interest to some of you mk4 owners that arent always able to take the car to dealers etc, (my bill is lookin like near the ?500 mark on a d.i.y basis, so id hate to imagine the dealer costs!!!)

watch this space pics will be here sat tea time!!

Gaz 8)

Offline nrgizerbunny

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Re:engine rebuild pics here as of saturday!!!
« Reply #1 on: 08 May 2004, 08:57 »
gaz, are you getting your block skimmed? if so how you diying that?

have a nice day

sanj

kniterider

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Re:engine rebuild pics here as of saturday!!!
« Reply #2 on: 08 May 2004, 19:32 »
block dont need skimming (cast steel/iron) ive heard reports that heads may need skimming if they have not been removed by following the undoing sequence, but have been assured the replacement head (when it arrives , now monday >:( ) which is a 19k mile unit complete has been pressure tested and checked for flatness is ok, unless theres been any over heating problems which could warp a head i dont think there will be any need, the new vw head gasket is a nice thick jobby (same as old one, a four layer item) if there is any reason for the head to have been skimmed it has to be done with in an extremely tight tolerance as the smash point (piston/valve collision) is very tight on the 20v engines!!!!! any ideas/thoguhts you have on my rebuild please reply, but i think i have every thing 99.9% ready for the build as soon as the head arrives!

Gaz 8)

kniterider

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Re:engine rebuild pics here as of saturday!!!
« Reply #3 on: 10 May 2004, 21:37 »
head still not arrived, have rung em and played up f@ck, as i ordered on wed, with next day delivery!!!!!, so theyve promised tomorrow now, like they promised fri, and sat, and monday!!, if i aint got by 10am tomorrow i want my money back!!! id rather pay a tad more and at least get the said item!!, was bored today so ive put the new water pump in the block and the spring loaded unit that tensions the tensioner pulley, fittted cambelt onto bottom pully and refitted lower guard and auxilery pulley to crank, de coked all piston tops and have flated out the nicks where the valves hit em, dont think it will make any difference with tiny marks on em as theres still factory stamped marks on em any way!!

Gaz 8)

will take pics in morning and then post em!!


kniterider

  • Guest
Re:engine rebuild pics here as of saturday!!!
« Reply #4 on: 12 May 2004, 19:20 »
how fooked off am i!!!!!!!!

9.30am tuesday cylinderhead finally arrives, unloads from van driver fooks off, i open and what a c@nt, its not off a 1.8 20v non turbo!!!! (engine code agn) its off a 1.8 20v turbo!!! (engine code agu), it has the lot cams, pulley, rocker cover, complete with the ever failing 'coil packs', exhaust manifold, and thats it, i rung the geezer i got it from and he said its fine to fit, identical apart fromt the size of the inlet ports, not a bad thing so i started to strip cams etc as mine are different and mine has vvt, turned head over after i removed the cams and one of the fookin inlet valves wouldnt close!!! arrrggggghhhhh, rung the geezer to complain some more and as unit had been pressure and crack tested it was like that when it was dispatched, so the 3/4 days its been slidin round in the back of a tnt wagon its got fooked!!!, right geezer is willing to give me full refund or some cash back to cover getting replaced,, so i plumped for the later, as the prices of all the ohter heads were ?300-400 plus vat,

so i had to make a tool to fit on my old valve spring compressor to fit as these are tiny, remove spring cap and collets and remove bent valve, no problems, guide ok, right i thought, remove on from my old head....... which i did and luckily enough picked a straight one 1st go!!, got the grinding paste and sucker and ground the baby into position fo ra while, clear away all paste residue etc and fit replace ment valve properly, looked at all the other valves all ok , so transfer my cams and vvt unit over to agu head, piss easy to do (marked cam sprocket positon and chain position to ensure i get timing as it was on old head), right after lubin with fresh oil during assembley i make sure every thing is tightend to correct tourqe, right let bang her i think, fit extended locating bolts to head, apply gasket then gently lower the head, tourqe up in correct sequence and stages all spot on, get cam in tdc timing position, and then the crankshaft, easy (ensuring no piston to valve contact), fit timing belt and tensioner and apply tension,
     then refit injection system, manifold etc and some other bit, turn over by hand without plugs and every thing goin to plan, turn over on key nice chuffin noises coming from spark plug holes, nice we have compression.

apply plugs and cross fingers, turn the key and...........

what a f@ckin racket!!!!!!!!!!!!!!

she runs but on about 3 1/2 cylinders.... fooker
ring andy water a independent vw geezer for advice, he tells me about the hydraulic tappets causing probs if oil no 'squeezed from them apon rebuilding' so i strip and do the above mention operation (head still on car) rrebuild once more and time up and have another go, nor running on about 3 3/4 cylinders.......starts straight away, ok about 3k revs, but lumpy tick over and occasion band of missing higher in the rev range, havent got stuff to do a compression check as i reckon 1 or 2 of the other inlets on chamber no4 (where i changed valve earlier may also be a little off its seat)???? well cheesed, ready for towing car somewhere to torch it!!!!


Gaz >:(