hydraulic tappets DG motor

Post by **dink** » 15 Nov 2006, 16:12

my hydraulic tappets are getting very noisy
i've done the regular oil changes etc etc, do i need to split the block to get them out or will they come out with the block intact

Post by **kevtherev** » 15 Nov 2006, 16:22

OK well before you do that have you given it a good half hour run and then are they still noisy?
Have they been adjusted...although they are supposed to be self adjusting this can be done.
Basic adjustment is outlined in the haynes manual

I'll find the relevent post

Post by **dink** » 15 Nov 2006, 16:27

it's an 80k mile motor are they likely to need adjusting
i thought i'd get the out clean or replace put em back an see

Post by **toomanytoys** » 15 Nov 2006, 16:30

USe only a 15w40 or 15w 50 or 20w50...
SHort runs will make them noisy.. as The rev says, take it for a good run.. 30 mins..

Adjustment can be made by.. Backing adjuster right off (when rocker not actuating valve) and 1/2 to 1 turn in from just touching.. the 2 turns as per Bently and Haynes is too much i several peoples opinion (1/2 turn is how I run mine)

Post by **kevtherev** » 15 Nov 2006, 16:32

you can do it with the heads on but you'll need to buy new pushrod tubes

its on the wiki

http://www.club80-90.co.uk/wiki/index.p ... d_in_place

Post by **dink** » 15 Nov 2006, 16:36

thanks guys

Post by **toomanytoys** » 15 Nov 2006, 16:36

But you wont get the pushrod tubes back in witht he heads on... and colapsible ones are bloomin expensive..

a run and thicker oil is cheaper and easier to do....

a start, run for 5 mins move and stop always makes both of mine rattle..

Take it up the road for an hour if it has only done 10 minute runs...

Post by **Dan Wood** » 15 Nov 2006, 16:55

...it might be worth just checking that the studs that hold the rockers in place haven't stripped!

I know a man who though he had a noisy tappet but actually his whole rocker assembly was hanging loose at one end...

Post by **toomanytoys** » 15 Nov 2006, 17:45

Good point Dan
Worth checking nothing amiss in there with the rockers and shaft retainers..

Post by **dink** » 15 Nov 2006, 17:52

been inside the rockerbox already, everything seems OK in there
first off i thought i had a sticky valve

Post by **gwolf65** » 16 Nov 2006, 21:26

Just a quick note put Boston Bob in google and have look at his articles some good info regarding tappets on there.

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hydraulic tappets DG motor

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