Bowie69 Posted October 21, 2022 Share Posted October 21, 2022 Follow up: Not saying it is definitive, but interesting nonetheless. Quote Link to comment Share on other sites More sharing options...
ThreePointFive Posted October 21, 2022 Share Posted October 21, 2022 That's very informative. For the cost of some new genuine lifters, this has to be worth a go. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted October 21, 2022 Share Posted October 21, 2022 The test he developed in the first video was interesting ... also indicative how variable with a set it could be.... Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted October 21, 2022 Share Posted October 21, 2022 That said, maybe yours sounds fine to me as I tend to use Rhoads lifters when I can.....! Quote Link to comment Share on other sites More sharing options...
ThreePointFive Posted October 21, 2022 Share Posted October 21, 2022 I have heard the Rhoads are noisy so it does depend on your reference point but the girlfriend was in the car for the first time a few weeks ago and asked why she could hear a pneumatic drill but couldn't see any roadworks. They've got to go. 1 Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted October 21, 2022 Share Posted October 21, 2022 Oh.....sounds like they have got worse in that case. Quote Link to comment Share on other sites More sharing options...
ThreePointFive Posted October 29, 2022 Share Posted October 29, 2022 I've been changing the lifters today, took far longer than hoped so no start up yet. One thing that was obvious was how different the profile is of the genuine vs aftermarket, I am very confident they're at least made in a different place. Most of the time was spent trying to get the pre-load right, and after trying every variation of shim, nothing is in the 40+ and -60 thou range, half are always outside of it. Which half seems to be entirely random. So is it better to have too much or too little preload? I have erred on too little, with most having just under 40. Clearly the only answer is adjustable pushrods but I won't have that opportunity. 1 Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted October 29, 2022 Share Posted October 29, 2022 If it is just under 40, I'd suggest that that is perfectly fine. Can probably run up to 100 though without an issue. I don't think you are running a particularly hot cam, are you? If not, then you are definitely fine. Quote Link to comment Share on other sites More sharing options...
elbekko Posted October 30, 2022 Share Posted October 30, 2022 Too much preload definitely seems worse, as you run the risk of hitting the end of the lifter and maybe bending pushrods. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted October 30, 2022 Share Posted October 30, 2022 I have to admit I've never done lifter preloads, Rover never did and unless you're on a hot cam with high lift I don't think it's necessary? Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted October 30, 2022 Share Posted October 30, 2022 Or skimmed the heads... Worth a check at very least, if in the ballpark it'll be OK. 1 Quote Link to comment Share on other sites More sharing options...
smallfry Posted October 30, 2022 Share Posted October 30, 2022 I dont think its necessary either. I dont even think its necessary for a hot cam either, UNLESS its a regrind, which has probably had some material removed from the base radius. Back in the day, hot cams were exchange, and a regrind was how it was done, but I dont think anyone does regrinds nowadays. Unnecessary shimming alters the valve geometry (assuming Rover had it right in the first place) and will cause side loading on the valve stems. The correct was to do this after a skim, is to use shorter pushrods, but this has never been an option with the Rover V8 unless you go adjustable. They always used to be available from the factory for USA Ford and GM at one time I suppose though, now that most of these engines are well used and pre enjoyed, you dont know if the head/s have been skimmed previously, but then you should be measuring them for thickness. One advantage with having a lot of preload though, is that the lifters will take up the slack from a higher degree of wear 😁 Quote Link to comment Share on other sites More sharing options...
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