sidewaysdan Posted March 8, 2020 Share Posted March 8, 2020 Has anyone got any tips on changing the rocker/cam cover gaskets on the ge . I had mine replaced a few hundred miles/ 2 years ago but they are leaking again. Thanks Dan Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted March 8, 2020 Share Posted March 8, 2020 Use OEM gaskets from toyota. I've seen & used cheap oem replacement gaskets that look like they do the job, but dont form a good enough seal so end up having to change them a lot sooner than usual. When installing make sure you have a clean surface for the gasket to mate too. Usually cleaning with brake cleaner is enough. Avoid using RTV unless you have a damaged/warped mating surface / rocker cover that needs a bit of sillicone to help fill in the gap for better sealing. If the washers for the rocker cover bolts are brittle & rock hard then maybe get a set of new ones. You don't want to over tighten the rocker bolts when installing the covers, and with hard washers its easier to over tighten. I think the tightening torque is something silly like 6-8nm, but easier to tighten by hand. Using a small ratchet you can feel when the bolts are snug and dont want to tighten more. When tightening start on the middle bolts and work your way outwards, tightening progressively. Usually takes 3 passes on the bolts like this to pull the rockers down evenly and compress the rubber gasket. I've seen rockers sometimes leak after they have had fittings welded into them and they are slightly warped, so check on a straight edge if you have done something like that. But I think NA rockers are magnesium so shouldn't have same problem as GTE rockers. Quote Link to comment Share on other sites More sharing options...
mc92 Posted March 8, 2020 Share Posted March 8, 2020 Some people use a dab of sealant at the front end of the engine. I didn't when I was doing mine and they haven't leaked but I've seen it recommended a lot. Quote Link to comment Share on other sites More sharing options...
sidewaysdan Posted March 8, 2020 Author Share Posted March 8, 2020 Thanks chaps. Does the whole plenum have to come off. Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted March 8, 2020 Share Posted March 8, 2020 Thanks chaps. Does the whole plenum have to come off. Yes Quote Link to comment Share on other sites More sharing options...
Style Posted March 8, 2020 Share Posted March 8, 2020 Yeah as mc92 has said, dab of silicone over the front and rear sections that run over the cams as per the Toyota user manual. Quote Link to comment Share on other sites More sharing options...
Scooter Posted March 9, 2020 Share Posted March 9, 2020 Also whilst you only nip them up, check then a few miles head cycles later as they can need a bit more... Quote Link to comment Share on other sites More sharing options...
Johnm400 Posted March 9, 2020 Share Posted March 9, 2020 Mine was leaking at the rear but i nipped the bolts ever so slightly and it seems to of cured it for now. Might be worth changing your spark plugs why you have the inlet off. Quote Link to comment Share on other sites More sharing options...
sidewaysdan Posted March 9, 2020 Author Share Posted March 9, 2020 Yeah I’ve given them a little nip but still leaking. Yeh new plugs and new 10mm leads will be done and anything else that needs changing Quote Link to comment Share on other sites More sharing options...
sidewaysdan Posted March 11, 2020 Author Share Posted March 11, 2020 Any recommendations on what sealant to use Quote Link to comment Share on other sites More sharing options...
sidewaysdan Posted March 31, 2020 Author Share Posted March 31, 2020 Had a couple of hours free today so made a start on the car. Quote Link to comment Share on other sites More sharing options...
T2 MSW Posted April 1, 2020 Share Posted April 1, 2020 Looking good, don't over tighten them when putting it all back together. The common misconception is they need to be really tight or people keep just nipping them up and thats what destroys the Gaskets. Its really low at like 7 ft/lbs IIRC Quote Link to comment Share on other sites More sharing options...
sidewaysdan Posted April 1, 2020 Author Share Posted April 1, 2020 Hi mate . Yeah I’ve seen that. I’ll try not to Quote Link to comment Share on other sites More sharing options...
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