GolfGTIforum.co.uk
Model specific boards => Golf mk2 => Topic started by: Carnie on 13 February 2010, 17:27
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My mate decided to do his head gasket today since ive done mines.We bolted it all back up and timed it.Gave it a few turns by hand and it was all good.No resistance and no sound.Anyway we turned it on and at idle its making a rattle-knocking noise from the head,runs fine otherwise,then when you give it a bit of gas it goes away.As far as i can see the engine it timed up fine,cam shaft is at tdc,No1 piston is at the top and the dizzy is at No1 too.This is everything i checked with mines and thats works fine,no nise or anything.We let it run for about 30 secs and gave it a few revs but it doesnt help.Any idead chaps?Oh its a 1.8 btw
cheers
Jamie
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could be tappets, give it a litre of dexron II atf oil and run it about for a week gently then do a full oil/filter swap. the ATF has detergents in which sometimes cleansou out the tappets and quietens em down. be aware thatg if any other parts of the oil system are weak this could unclog em, i found my oil cooler died a week after i did this. basically it cleaned out all the crud holding it together!
what oil did you put in it, and did you use a decent oem quality filter?
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He didnt do an oil or filter change,should this have been done at the same time?I only did my first head gasket last week so i didnt know it shouldv been done.He treats his car well though so itll have good oil and a good filter on it just now.Is there anything else this could be?Just worried that its maybe not timed right and the valves n pistons are clashing.If it was out by like 1 tooth would this be the case?Is it ok to drive like this then?hes left the car at mines till we figure it out.Its odd though,why would the tappets decide to make noise now,dont think they were before?I dunno,like i say im new to doing the whole thing myself.
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Is it possible this could have came about from not using the car?He just told me he thinks it may have been like that when he brought it down, he had just put it down to his exhaust knocking?If we leave the car to warm up properly and let the oil circulate will this help it?
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Stuck tappet maybe?Should we just let the engine run for 10mins and see if itll clear,just dont want to do any damage. to it.
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go back over the timing and double check, worth noting that the dizzy will spin freely once the belt is off so easy to mess the ign timing up even if you were carefull not to move cam & crank. as you say after its warmed up a bit the problem may go away, but might be an idea to give it some good oil and a new filter from GSF if its not been done recently
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Cheers,ill start it up tomorrow after work then as itll be a bit late when i get back tonight and see if it quietens down. We went over the timing a few times on sat so im pretty confident its right,hopefully thisll fix it.Ill report back with my results.Cheers!
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could be tappets, give it a litre of dexron II atf oil and run it about for a week gently then do a full oil/filter swap.
I wouldn't do it for a week - about 100 miles at most is enough (ideally, with 1 journey), and even then I had some pretty poor experience with trying it - my engine is an oil burning monster now :(
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Hi,just looked into that Dexron stuff,am i right in thinking that it really is automatic transmission fluid that i should use?Like this?
http://cgi.ebay.co.uk/ATF-DII-DEXRON-2-Automatic-Transmission-Fluid-1-ltr_W0QQitemZ370282346730QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item56368c38ea
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yup!
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Hmm :grin: cool didnt know that at all!Cheers,ill get my mate to buy some and give that a bash then.
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Better yet, buy the proper stuff for the job and at least then you have the manufacturer of the stuff to blame if it goes pop due to putting random liquids in your engine on the advice of someone you dont know (no offense meant here Rubjonny!).
http://www.wynns.be/product.aspx?nav=1&g=1&s=25&b=768&p=76864&l=EN
Saying that, if you finish the head gasket job properly by doing an oil and filter change you will probably not need to do anything if they werent making a racket before. Out of interest, have you checked the oil level at all since?
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Yeah i was looking at that stuff before but when Rub mentioned that Dexron i though i mays well give it a try instead.He always gives sound advice on all the forums so i know i can take his word for it. :wink:
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this is a tip i got from cgti, iirc it was the legend that is TSC who I got it from! certainly never casued my 1.8 engine to sploderise, though as i say it was the last straw for my oil cooler. to be fair it had done 170k, so was well overdue a replacement! Used it on the 2.0 after I fitted it as well, didnt do that any harm either.
I've used the proper engine flush too, just whatever you can get for cheepie!
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:grin: Yup a stuck tappet it was,let it run for ten mins and bam,it went away,seems to be running a bit lumpy though,only on idle?Hes not had it used for about 2 months so maybe its just getting over that,also its low on fuel,cut out a few times when i took it for a short spin so hopefully its just the that.Anychance it could be anything else,leads plugs n dizzy are fairly new,checked the connections and all seem to be fine,was dark though so ill have a proper look on sat.Anyway,cheers for the help chaps,another mystery solved!
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ATF is an age old trick well known in the trade. take rover v8's they gunk up something spectial engine flush don't do a lot to them ATF dose tho
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Hey,sorry to start up an old thread but i figured i may's well use this since its the same car and problem haha.My mates left his car sitting again for a few months and this clunking noise has came back on start up.Only this time after running the car for a good 30 mins its still there.I took the cam cover off and turned it over by hand.All the tappets are moving free with the cam and there doesnt feel like anything catching,all are getting a good oil flow aswell.Going to buy him some of the wynns stuff tomorrow and see if that will solve it.I was just wondering where the clunking noise is actually coming from,is the mechanism inside the tappet thats stuck or something or is something clashing and causing damage?
Cheers!
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Found this site that explains hydraulic lifters pretty well.
http://www.ratwell.com/technical/HydraulicLifters.html#operation
Think i understand why it would be knocking if it was dirty or dry etc, ill try the wynns stuff and see if that gets it working properly again!
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Ok need a bit of help if anyone is listening,took the tappets out and they all look fine to me,how can i tell if there bad?Theyve all got oil,no obvious marks ,dents etc.What else would make this knocking noise?I gave all the valves a push down and they all move fine,im confused!!!! :undecided:
We ran the car for about10 mins last night and put some of that lifter treatment in and then left it to run for a further 20mins,still nothing!Just making this loud knocking noise