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debaron

Original Poster:

668 posts

83 months

[news] 
Thursday 12th March 2009 quote quote all

I have a ticking noise from the engine about 70% of the time. Been through many things (EMG, compression test etc) to diagnose but could be a 'sticky' lifter.

The fact that it WILL go away completely some of the time leads me to think it's not:

Piston Slap

Blown Ring

Noisy Cam


It does seem to coincide with lumpy running so it may well be.

Elsewhere on various forums, the advice to clear a sticky lifter has been to:


Drain out a few pints of the oil - add 'as much oil as has been drained out' of Automatic Transmission Fluid (ATF) and run the engine for 500 odd miles and then complete change of oil and filter.

Many may be horrified by this but ATF is a high detergent lubricant and pretty much the same stuff as you'd pay £12 for a little 500ml bottle from Halfrauds.


- What does everyone else think?

- Has anyone had a sticky lifter cured by adding those 'Hydraulic Lifter Treatments'.

- Do lifters often stick in RV8's?


Ryan


peaktorque

1,725 posts

97 months

[news] 
Thursday 12th March 2009 quote quote all
Buy a new set of lifters.

You don't even need to take the heads off, just the rocker shafts, inlet manifold and valley gasket.

Mornings work wink

rigga

4,627 posts

87 months

[news] 
Thursday 12th March 2009 quote quote all
This sticky lifter problem ive come accross in the subaru world,and a respected engine builder with many years experience remarked to me the exact same cure regarding ATF.... swears by it,so i cant see whats to loose by trying it .

Chimjunkie

2,879 posts

97 months

[news] 
Thursday 12th March 2009 quote quote all
coffee Keep talking....

debaron

Original Poster:

668 posts

83 months

[news] 
Thursday 12th March 2009 quote quote all

Sorry ChimJunkie, I don't understand - do you mean you want me to elaborate on the problem?
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Boosted LS1

13,636 posts

146 months

[news] 
Thursday 12th March 2009 quote quote all
If it's a valvetrain issue then there's excessive clearance, probably caused by wear on the cam. A lifter should pump up once you've raised oil pressure and done a short drive. If it's stuck inside then your engine must be well gummed up. Rover lifters aren't the same internally as overhead buckets so I don't think an accurate comparison can be made.

debaron

Original Poster:

668 posts

83 months

[news] 
Thursday 12th March 2009 quote quote all

The thing is - the Cam and lifters were done not 7000 miles ago!

I do do a lot of small trips to work (4 miles) and back every day, and it has been cold recently too. I've heard that can be harsh on the oil. Incidentally, I have very little oil pressure when idling warm. It's about 33 at cold start idle and just off the ' 0 ' mark when warm idle and about 30 when at motorway speeds.

I'll change the oil + filter, clean the injectors, get the AFM & Lambda mixture looked at professionally and if it's STILL running rough and ticking then I'm going to strip it down and rebuild it - on the bl**dy street if I have to!!!

CHGRIFF

322 posts

138 months

[news] 
Friday 13th March 2009 quote quote all
I had a similar problem with my engine, although mine seemed to occur mostly when driving in traffic (under low load). I bought a set of lifters and planned to change them when Jamie of Castle Race engines said the problem was most likely to be the oil. I was using Mobil 10/60 at the time. He suggested I try Millers oil which was proven with Rover V8 engines. I switched to Millers oil and the problem never occurred again. If your engines due for a service I suggest you change the oil first before stripping the engine down and changing bits. Worked for me.
Highly viscous oils are best suited to modern engines with tighter tolerances.

dogbucket

780 posts

87 months

[news] 
Friday 13th March 2009 quote quote all
Didnt somebody on here have a loose oil pickup in the sump which was aerating the oil and causing taping and low pressure?

Chimjunkie

2,879 posts

97 months

[news] 
Friday 13th March 2009 quote quote all
debaron said:
Sorry ChimJunkie, I don't understand - do you mean you want me to elaborate on the problem?
Sorry! Very interesting subject. My engine ticks and i have taken the rocker shaft off and reassembled using adjustable pushrods, the followers were new with the new cam, the exhaust manifolds have been on and off 3 times... I have tuned my ear to hear the ticking! Everyone else can hardly make it out irked

schmokin1

1,096 posts

98 months

[news] 
Friday 13th March 2009 quote quote all
for my own education, am I right in thinking that the old saying 'a noisy tappet is a happy tappet'
doesn't apply to the RV8? I always thought a slight bit of tappet tick was OK and meant that the valves had enough clearance to return to fully seated rather than being slightly held off the seat by a too small tappet gap that then closes up when the engine warms up. Or is this out of date due to the hydraulic lifters? You an tell this is one owner who hasn't had his top end apart yet....

Boosted LS1

13,636 posts

146 months

[news] 
Friday 13th March 2009 quote quote all
^ Hydraulics are meant to pump up and take up the slack and no more but they won't push the valve off it's seat and overcome spring pressure.

Debaron, I used to have similar oil pressures to yours on one of my engines. Thicker oil definately helps, try a 20/50 and see if that works. Next I'd see if the rockers have had shims put under them and if so they may be to thick. Or, the lifters may be a different height to genuine rover lifters. Any of these things can change the preload/clearance.

debaron

Original Poster:

668 posts

83 months

[news] 
Friday 13th March 2009 quote quote all

Thanks everyone, will definitely do the oil - was thinking of changing to a thicker grade anyway. I'll give Jamie at Castle Race a bell and order up some of the Millers.


Cheers

Ryan

Del 203

12,727 posts

135 months

[news] 
Friday 13th March 2009 quote quote all
On the oil pressure, i had a lower than normal reading, changed the sender & all fine smile


Problem is, I've changed my sender twice now, they only appear to last a few months then back to reading low frown

dbv8

6,812 posts

106 months

[news] 
Friday 13th March 2009 quote quote all
Chimjunkie said:
I have tuned my ear to hear the ticking! Everyone else can hardly make it out irked
Maybe its your watch

spend

12,468 posts

137 months

[news] 
Friday 13th March 2009 quote quote all
dbv8 said:
Chimjunkie said:
I have tuned my ear to hear the ticking! Everyone else can hardly make it out irked
Maybe its your watch
Did you open out the pushrod holes before inserting the adjustables.

TBH careful inspection of the pushrods, spring seats and follower holes gives me the willys wink They never seem to look in great condition.

Opening up the pushrod holes in the head is a no brainer IMHO.

Chimjunkie

2,879 posts

97 months

[news] 
Friday 13th March 2009 quote quote all
spend said:
dbv8 said:
Chimjunkie said:
I have tuned my ear to hear the ticking! Everyone else can hardly make it out irked
Maybe its your watch
Did you open out the pushrod holes before inserting the adjustables.

TBH careful inspection of the pushrods, spring seats and follower holes gives me the willys wink They never seem to look in great condition.

Opening up the pushrod holes in the head is a no brainer IMHO.
Didn't think i needed to. There seemed to be enough clearance. The adjustable pushrods were a more recent addition and the ticking is no different than before i put them in. Always convinced myself that it was the manifolds, but now put those ones in from CliveF and no different. I think the solution is a louder exhaust smile

Slacey

1,094 posts

100 months

[news] 
Friday 13th March 2009 quote quote all
I've had this problem since having the car (2 1/2 years now) and have tried both different oil and the lifter treatment additive with no success. Have learned to live with it now but may try the ATF thing. Similar to you, my engine had had a recent rebuild before my ownership.

spend

12,468 posts

137 months

[news] 
Friday 13th March 2009 quote quote all
Chimjunkie said:
..but now put those ones in from CliveF...
I'm pretty sure Cliff drilled out his holes, gaffa tape... in-situ if I remember the story correctly. Would be surprised if he had gone to that effort / risk of swarf if it wasn't necessary for those particular push-rods?

Cam could account for it ~ but wouldn't have thought his Crower had an excessive impact on the pushrod geometry vs your TVR 500 cam? Its only the lift and rocker 'sway' that varies how close the push rod gets to the hole in the head (hehe 'hole in the head' get it rofl)

Barkychoc

7,408 posts

90 months

[news] 
Friday 13th March 2009 quote quote all
Presumably the pushrods go boing boing like a guitar string when you're giving is some beans do they?
In which case you may think there's enough pushrod clearance but there may not be?
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