If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
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) |
Ads |
#2
|
|||
|
|||
driver wrote:
> 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) > > 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. |
#3
|
|||
|
|||
"driver" > wrote in message ... > 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) > > 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 |
#4
|
|||
|
|||
"Busahaulic" > wrote in message
... > > 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.) > > 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? |
#5
|
|||
|
|||
"Tim Rogers" > wrote in message ... > "Busahaulic" > wrote in message > ... > > > > 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.) > > > > > > 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? > 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 |
#6
|
|||
|
|||
driver wrote:
> 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)and 3/4 turn is plenty--2 and it will rattle like a tin can. Prime the lifters in oil--via Bently Manual |
#7
|
|||
|
|||
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 everyone "Henderson" > wrote in message news:ummue.13475$tG.11267@trnddc05... > driver wrote: > > > 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)and > > 3/4 turn is plenty--2 and it will rattle like a tin can. > > Prime the lifters in oil--via Bently Manual |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Adjusting Valves - 427 Sideoiler - Tuneup Too - Questions - Please Help! | Willis | Technology | 4 | May 11th 05 05:12 PM |
What the . . . ? Fattie adjusting screws! | Mike Rocket J. Squirrel Elliott | VW air cooled | 20 | December 15th 04 01:40 AM |
sealing hydraulic connections | Abeness | Honda | 9 | December 7th 04 01:24 AM |
4x4 newbie. Rude and Intimidating Service | Brent Murphy | 4x4 | 32 | March 16th 04 06:14 AM |