bonkas Posted June 13, 2019 Share Posted June 13, 2019 Have had a catastrophic failure in my new engine build... Seems this happened because of a combination of flat adjusters, stiff springs and high lift cam, it appears the other exhaust valves show damage also (Have not had a chance to check intake side yet) Does anyone know if there are adjusters available locally that will fit straight in? This is a 4g63 by the way. I have been looking at these but reviews say they stuff out quickly... https://www.ebay.com/itm/EMPI-VW-BUG-BUS-HD-SWIVEL-VALVE-ADJUSTERS-VW-Type-1-2-3-Set-of-8-21-2031/330858969379?epid=667297488&hash=item4d08bb3923:g:8C0AAOSwdGFY3vH~ https://www.ebay.com/itm/Crane-99680-16-Rocker-Arm-Adjuster-in-Steel-3-8-Fits-Ford-FE/332880673478?epid=1340857478&hash=item4d813bfac6:g:kMkAAOSwQzJb6xUo Not sure if these would fit... https://www.ebay.com/itm/Camshaft-Rocker-Arm-Adjuster-Screw-for-Mitsubishi-L200-2-5-DiD-2005-2015/182290486900?epid=1716214156&hash=item2a715c1674:g:qJUAAOSwYIxX5Oax Quote Link to comment Share on other sites More sharing options...
Ranter Posted June 13, 2019 Share Posted June 13, 2019 I'm not quite sure what you have there, are they hydraulic and you want adjustable ones? Or just more adjustment? If hydraulic to manual you can swap complete rocker arms over, you might want to line bore that on a new engine though. (but you'd get away with it) Not sure about rocker angles and aftermarket cam though. Quote Link to comment Share on other sites More sharing options...
Nominal Posted June 13, 2019 Share Posted June 13, 2019 Looks to me that the geometry is bad - rocker adjuster end is loading over the side of the valve stem instead of centered. Not sure that a pivoting adjust foot will help. Quote Link to comment Share on other sites More sharing options...
bonkas Posted June 13, 2019 Author Share Posted June 13, 2019 These are solid lifters, straight swap from the original Hydraulic. The cam, valves, springs and rocker assembly was assembled by kelford cams so I am sure it's correct. Quote Link to comment Share on other sites More sharing options...
Nominal Posted June 13, 2019 Share Posted June 13, 2019 Well, what did they say about the damage? Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted June 13, 2019 Share Posted June 13, 2019 Have you got more pics? For something that has a sweep motion, the contact patch between the tappet and the valve seems awfully small? Quote Link to comment Share on other sites More sharing options...
bonkas Posted June 13, 2019 Author Share Posted June 13, 2019 35 minutes ago, Nominal said: Well, what did they say about the damage? At this stage we are thinking a bad valve but given there is also some damage on the other exhaust valves im not so sure. @RUNAMUCK I will see what other pics I have and post them up in here. Quote Link to comment Share on other sites More sharing options...
Unclejake Posted June 14, 2019 Share Posted June 14, 2019 I'd be talking more to Kelford mate. They absolutely know what they're doing...but no one is infallible. They may have made a small error on an already pushed envelope From the photo (only) I have a theory as to what's happened, but I won't share it here as a single photo isn't anything like as good as actually looking at the valve stem to adjuster contact patch/witness marks. Kelford have a good reputation so I reckon they're your best shot by far. 3 Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted June 14, 2019 Share Posted June 14, 2019 Hence why I asked for more pics too. does it have these? (Sorta looks like it does ) sr20 one shown for reference 2 Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted June 14, 2019 Share Posted June 14, 2019 If your cam has had the shit ground out of it, a taller lash cap helps to correct the rocker geometry. IE bring the rocker arm further up, so it's not sweeping past the point of good geometry especially with more lift from a big cam. 2 Quote Link to comment Share on other sites More sharing options...
bonkas Posted June 14, 2019 Author Share Posted June 14, 2019 Nah mine has nothing like that, Just the adjuster screw and locking nut, no other components. That is the best Pic I have, I will get more once the head is removed and I can get a better look at things. Quote Link to comment Share on other sites More sharing options...
johnny.race Posted June 14, 2019 Share Posted June 14, 2019 I must be missing something here ... why is the head coming off before you have determined where you have a geometry and or bind problem? This sorta shit generally takes two people ... one doing the turning and the other armed with a flashlight and magnifying glass. Are these engines known to be problematic in terms of piston to valve clearance? 1 Quote Link to comment Share on other sites More sharing options...
scooters Posted June 15, 2019 Share Posted June 15, 2019 how many thou cam lift? Quote Link to comment Share on other sites More sharing options...
Get it done Posted June 15, 2019 Share Posted June 15, 2019 8 hours ago, RUNAMUCK said: If your cam has had the shit ground out of it, a taller lash cap helps to correct the rocker geometry. IE bring the rocker arm further up, so it's not sweeping past the point of good geometry especially with more lift from a big cam. I bought a l28 years ago and this was the problem . after installation of taller valve caps it was all good . The cam had a really aggressive grind and was a lot smaller. my 2c 1 Quote Link to comment Share on other sites More sharing options...
bonkas Posted June 16, 2019 Author Share Posted June 16, 2019 Cam Specs: Quote Link to comment Share on other sites More sharing options...
Truenotch Posted June 18, 2019 Share Posted June 18, 2019 Paging @BobbyBreeze, do you read me. 1 Quote Link to comment Share on other sites More sharing options...
BobbyBreeze Posted June 19, 2019 Share Posted June 19, 2019 Is the rocker tip sweeping off the edge of the valve stem and into the chamfer? Certainly needs looking at carefully, I'd be getting out the engineers blue and looking at the sweep over the valve stem and the adjuster. Looks to me like the base circle has been dropped quite a bit with the added lift, which lifts the rocker arm up at the valve end. So you wind out the adjuster to make up this clearance but now the adjuster tip moves outwards on the valve stem. Not much you can do to fix that on this motor unless you hardface the follower pad at the other end of the rocker. Lash caps might help too but I am sure Kelford can help you out with this. Large radiused tip adjusters are certainly a good idea seeming you've got like 5mm more lift than OEM. Those L200 ones look the ticket. Worth spending $8 to find out. p.s. nice Big cam! Edit/ 4g63 sohc don't have a cam tunnel haha 2 Quote Link to comment Share on other sites More sharing options...
bonkas Posted June 19, 2019 Author Share Posted June 19, 2019 19 hours ago, BobbyBreeze said: Is the rocker tip sweeping off the edge of the valve stem and into the chamfer? Certainly needs looking at carefully, I'd be getting out the engineers blue and looking at the sweep over the valve stem and the adjuster. Looks to me like the base circle has been dropped quite a bit with the added lift, which lifts the rocker arm up at the valve end. So you wind out the adjuster to make up this clearance but now the adjuster tip moves outwards on the valve stem. Not much you can do to fix that on this motor unless you hardface the follower pad at the other end of the rocker. Lash caps might help too but I am sure Kelford can help you out with this. Large radiused tip adjusters are certainly a good idea seeming you've got like 5mm more lift than OEM. Those L200 ones look the ticket. Worth spending $8 to find out. p.s. nice Big cam! Edit/ 4g63 sohc don't have a cam tunnel haha I will be checking all these things, I have ordered a set of the L200 adjusters also but wont be here until late next month unless I can find a new set locally. I am hoping to send the head to Kelfords for a second look also. 1 Quote Link to comment Share on other sites More sharing options...
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