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Hydraulic Lifters, Bus - Adjusting - newbie T4 engine

Just got a new T4, 2L longblock and put it in my 74 Bus. WHen I started it, the valves were tapping so loud. THe workshop manual says to bring the screws so the just touch the valves (zero clearance) then 2 full turns and tighten nut.

I noticed on some that after one turn of the tappet screw, the valve started to compress (open). Is this normal and will the lifter adjust?

On the1 and 2 cylinder, I did 2 turns. the 2 cylinder valves compressed a bit. I did not touch 3 but on4, i adjusted about 1 to 1.5 turns, just when the valve started to move.

I think the 1 & 2 are much quieter than the 3 & 4 side. There is still valve tap, especially ahenb driving.

Suggestions?

Can I do when warm/hot?

I used to have the solid lifters in an 1800 engine. I have adjust then often. .006 and .008 inches.

--Thanks

STeve

74 Westie, NJ (almost ready for its first festival of the summer)
Reply to
driver
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The workshop manual is wrong!! It has been corrected in the later Bentleys. The adjustment should be 3/4 of a turn in from 0 lash on a cold engine.

J.

Reply to
P.J. Berg

I prefer to do as little as necessary. When first starting, some engine builders recommend initial run-in at 3,000rpm for 20 minutes. On my most recent engines I followed that advice and all the (new) lifters pumped up during that time. It was scary...(!) When I have had to tighten any up, I choose to go as little as necessary, but the 1-2 turns will not damage anything; they will adjust. (three-quarter turn would be better than 2 turns, in my opinion.) I suspect that if you ran the engine at a reasonable rpm that is high enough to provide good oil pressure, that eventually your lifters would have pumped up. If it's a used engine or assembled by someone who doesn't know what they're doing, 3000rpm no load for 20 minutes may be unwise! -BaH

Reply to
Busahaulic

FWIW..............I used the two turns in method on a new set of lifters in a waterboxer several years ago without knowing about the updated information to use only 3/4 of a turn. They pumped right up and stayed quiet for about

40,000 miles. I don't understand why they changed their hydraulic lifter adjustment recommendation. Any ideas Dave?
Reply to
Tim Rogers

I don't know, but as I said, it should not be necessary. The original information I got was from Mark Stephens High Performance (R.I.P.) and later the let 'er run at 3000rpm for 20 minutes came from my local high performance machinist, NW Connecting Rod, as I recall. It seems to me that when I cranked 'em in way back when, it took forever for them to settle in whereas going to touch and just a tad more when new, then running, they came right up. Because some are very soft before run-in it is sometimes difficult to know where you are exactly, so after a few days I backed them off and went for zero plus a quarter turn and had excellent results. Have played a lot with oil viscosity. Some engines have preferred thick, some thin. It makes little sense. -BaH

Reply to
Busahaulic

3/4 turn is plenty--2 and it will rattle like a tin can.

Prime the lifters in oil--via Bently Manual

Reply to
Henderson

Its been a while and about 500 miles out to PA and Back.

I will back them off. The shop that I got the engine from said 1 turn. He also said to add the blue STP oil treatment. He said the valve train in these engines love it.

They have quieted down some. But tommoro I will abck them all off to one turn.

THanks every>

Reply to
driver

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