Steve Posted May 9, 2009 Share Posted May 9, 2009 Just been searching to find the valve clearances for HKS 264/264 camshafts. I found this Clearance in mm (cold) 0.15-0.25 int 0.25-0.35 exh In old money that's 0.006" - 0.010" int 0.010" - 0.014" exh Can someone please confirm that these are the correct values. Quote Link to comment Share on other sites More sharing options...
Lee P Posted May 9, 2009 Share Posted May 9, 2009 0.2 intake 0.3 exh with .03+ over going by the specs that come with the cams Quote Link to comment Share on other sites More sharing options...
Steve Posted May 9, 2009 Author Share Posted May 9, 2009 0.2 intake 0.3 exh with .03+ over going by the specs that come with the cams Topman Thanks Lee Quote Link to comment Share on other sites More sharing options...
Steve Posted May 10, 2009 Author Share Posted May 10, 2009 Right, have been out measuring the valve clearances this morining and here are the results: REAR OF ENGINE EXH INT 0.29 0.18 0.30 0.18 0.28 0.20 0.30 0.19 0.30 0.20 0.30 0.19 0.30 0.19 0.30 0.19 0.28 0.19 0.28 0.19 0.28 0.19 0.30 0.15 FRONT OF ENGINE So most of them seem ok, apart from the front valve on the intake side. Would that cause a problem? I was advised by Ryan to check these after hearing some strange noises through his DET cans whilst mapping and at SRR yesterday (hense my runs were aborted). I also have been getting a hesitation occasionally which causes slight DET(IIRC). I also get alot of popping in the exhaust on lift off which my car has always done since i can remember. Cant remember what it was like when stock (stock cams). Is there a posibility that a valve spring has failed? Cant really think of much else that can cause this. Any ideas? Quote Link to comment Share on other sites More sharing options...
Steve Posted May 11, 2009 Author Share Posted May 11, 2009 Quote Link to comment Share on other sites More sharing options...
TLicense Posted May 11, 2009 Share Posted May 11, 2009 Nah it'll just be the 1 shim was bigger than the rest. If you've access to the proper tool, then pull the shim out and measure it. Subtract 0.05 to that thickness and go and get one from toyota. They're about a tenner each. If you haven't got the proper tool, then removing the shim is a camshaft out job. Not tricky just a bit of a laborious task as you have to get the loosening / tightening sequence of the valve caps right. Once the camshaft is off you can remove the shim using a magnet. Measure it up, subtract 0.05 and away you go... Quote Link to comment Share on other sites More sharing options...
Steve Posted May 11, 2009 Author Share Posted May 11, 2009 Was hoping you would see this Tony, thanks for taking the time to reply Does anyone have the proper tool to remove the shim that i could borrow to save me removing the camshaft? Quote Link to comment Share on other sites More sharing options...
Ryan.G Posted May 11, 2009 Share Posted May 11, 2009 Definatly get no1 on the intake changed Steve, abit too tight that.. Also when changed do a leak down test of the engine if you can to see if the valve seating has been affected due to tight tolerance. Ryan Quote Link to comment Share on other sites More sharing options...
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