As in try and match the tension on the other push rods?
LC S Coupe Rebuild
Started by
_judgelj_
, May 27 2012 12:34 AM
674 replies to this topic
#502
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Posted 25 February 2014 - 10:10 AM
You can't drain some coolant off???I'll take a few ear buds with me, Dave. Problem trying to coat the inside of the boss is the pool of coolant inside.
Just wind them down till you have about zero lash and work from there.
I usually go between 20 and 40 thou with hydraulic lifters.
#503
_judgelj_
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Posted 25 February 2014 - 10:14 AM
It's expensive coolant lol!!
Anyway got it in no worries, just have to adjust the rocker arms. I've noticed a few are quite loose I can turn the pushrods dry easily. Could this have been a factor in the clean break?
Anyway got it in no worries, just have to adjust the rocker arms. I've noticed a few are quite loose I can turn the pushrods dry easily. Could this have been a factor in the clean break?
#504
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Posted 25 February 2014 - 10:27 AM
So empty it into a clean container and re use it...It's expensive coolant lol!!
#505
_judgelj_
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Posted 25 February 2014 - 12:10 PM
My aim is terrible. All sorted anyway I drained coolant out with a during and fitted it it. Adjusted the tappets with the booster vaccume hose disconnected which made things difficult until I realised. I might give them one more go in a little while but hopefully this lasts.
Cheers for the help very much appreciated
Cheers for the help very much appreciated
#506
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Posted 25 February 2014 - 12:17 PM
Did you freeze the little bugger?
How much resistance did you have to getting it in?
Progress photos?
#507
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Posted 25 February 2014 - 12:33 PM
Pushrods should rotate, there should be no lash present tho.... just have to adjust the rocker arms. I've noticed a few are quite loose I can turn the pushrods dry easily. Could this have been a factor in the clean break?
When did the problem arise?
#508
_judgelj_
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Posted 25 February 2014 - 01:24 PM
Did you freeze the little bugger?
How much resistance did you have to getting it in?
Progress photos?
Yeah i froze it over night thanks for that. Went in pretty easy but not too easy. Easy in the sense that i was able to drive it in without needing a press. Though, it destroyed the nut i screwed over it. I drained some coolant, gave it a quick smear of #3, let it dry a little then i fitted it and hammered it nice and straight. Got it to about a 1/2mm level with the other one and left it as i didnt want to drive it too far. Interestingly though not all of the others are level anyway.
I then drilled the roll pin hole which was pretty easy, and fitted the pin. I tightened the rockers and then i ran it, backing them off one by one until they chattered, tightening to eliminate the noise and probably a 1/4 turn exta. Ill give them a once over before the weekend just in case i didn't do it right. Problem is i have to disconnect the booster hose when doing so. Can i just shove a rag in the hose to drop the idle, that wont harm anything will it?
New rotor button...
Pushrods should rotate, there should be no lash present tho.
When did the problem arise?
Yes, no lash you are right. What i should of said is that some rotate too easily which i thought could be because there was slight lash. Problem arose about a week ago when turning into my street. I was slowing down and i am pretty sure i downshifted to 3rd gear.
Also got some Loctite welch plug sealant, so it exists in case anyone didnt know.
Edited by judgelj, 25 February 2014 - 01:28 PM.
#509
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Posted 25 February 2014 - 01:47 PM
I am truly impressed you managed to successfully complete that repair leaving the head in place 
#510
_judgelj_
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Posted 25 February 2014 - 01:48 PM
You're impressed? Im mind blown, and i owe it all to 12.9 tensile steel.
#511
madtoranajzedded
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Posted 25 February 2014 - 01:53 PM
glad you got it in alright jacob,if i remember correctly been ages since i done rockers and the ol memory is starting to fade
i wound them down till the pushrod had no movement up and down and went 1 1/4 turn and did them in the in the firing order 153624
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my first experience doing this was with my dad when i was just a lad, he did them up and she wouldn't turn over ,so he hooked a tow rope
up to it and towed me down the road.and when he gave the signal i started to release the cluth about 1/4 of the way out ,she felt like it was going to lock up so i didnt do it and my dad was going nuts.off his head,so he towed me back and and abused the shit out of me.hes a big boy so i bit me lip.so when he left i undid them and walla she fired lol.
im surprise that the pushrod isnt bend jacob
#512
_threeblindmice_
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Posted 25 February 2014 - 02:13 PM
I meant so the nut is the same distance down from the top as the others .
#513
_judgelj_
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Posted 25 February 2014 - 02:14 PM
Hahah sounds like something my dad would put me through. Well i didnt do them in firing order, but they were already tensioned apart from the the first two on #1. But a 1/4 turn past silence seemed to do the job without the motor trying to stall. Pushrods are straight i checked them, strange huh.
Oh yeah no worries bruce thats what i ended up doing. I was just a bit worried as two nuts out of all of them were very tight to turn.
#514
_threeblindmice_
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Posted 25 February 2014 - 02:19 PM
You may have tightened the tappets to much last time , there can still be a tappet noise even when set right ,did you grind the slot in the tappet , to allow for the extra lift?
#515
_judgelj_
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Posted 25 February 2014 - 04:04 PM
No i didnt do that bruce, didnt know to be honest.
Last time i tightened them though i was able to turn the motor over and tighten one as the valve closed/opened on the other sort of thing.
#516
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Posted 25 February 2014 - 04:41 PM
Well done mate on the repair. I must admit I thought you would have to take the head off as well.
I am off from tomorrow and back to work Sunday. If you get it running again in the next few days give me a ring and you can bring it around here for a run.
#517
_judgelj_
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Posted 25 February 2014 - 04:57 PM
Yeah I'm going to get back to it Thursday and make sure it is running good, I'll let you know. Definitely able to make the cruise on the 22nd though!!
#518
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Posted 25 February 2014 - 08:07 PM
Well done on the repair.
Maybe pull the side covers and check for any pre load on the lifters.
As Bruce says, over lashing for wear noise is only going to lead to grief.
Maybe pull the side covers and check for any pre load on the lifters.
As Bruce says, over lashing for wear noise is only going to lead to grief.
#519
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Posted 25 February 2014 - 08:44 PM
Thanks.
Yeah that's a good point, i think ill give it a once over before i take it to the show on the weekend. Im worried i may have put too much tension on some.
#520
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Posted 25 February 2014 - 08:47 PM
Polished the rearview mirror and tapped a 1/4bsp plug with a 1/8npt thread.
Edited by judgelj, 25 February 2014 - 08:48 PM.
#521
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Posted 25 February 2014 - 09:09 PM
Thanks.
Yeah that's a good point, i think ill give it a once over before i take it to the show on the weekend. Im worried i may have put too much tension on some.
Jacob, great work. I had my doubts too that this repair could be done successfully without removing the head.
They won't be over tensioned at 1/4 turn from zero lash. Hydraulic lifters automatically compensate so they always run at zero lash.
Factory spec for adjustable rockers on a bog stock red 6 is 1.5 to 2 turns from zero lash.
I run my anti pump up lifters at 3/4 turn from zero lash no problems.
#522
_judgelj_
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Posted 25 February 2014 - 10:29 PM
It seemed like a 1/2 turn was way too much as the valve would stay open and the engine bogged down. Is this because of the cam?
Edited by judgelj, 25 February 2014 - 10:29 PM.
#523
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Posted 26 February 2014 - 08:23 AM
With the original lifters 1 and 1/2 turns from when they stop chattering.
Done in half turn increments.
Yes you will find it runs funny during the process. Thats why its done in stages.
#524
_threeblindmice_
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Posted 26 February 2014 - 08:52 AM
You were unlucky most times it's the rocker that breaks , I always had one in the toolbox .
#525
_judgelj_
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Posted 26 February 2014 - 12:38 PM
im pretty sure a full turn would keep the valve open on mind. Maybe because of the bigger cam.
Bruce i wonder why it snapped at the thread clean. Was i revving it too hard?
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