7MGE Head Gasket Replacement

69ho · 08-22-2013, 01:44 PM

I meant to mention that a member of another forum said he saw the same problem with his cover after removing the head. His engine had never been apart, so apparently Toyota does not control that surface very well???

cre · 08-22-2013, 05:40 PM

I've never seen it on a stock block. Yes, having it cut with the block is ideal. The issue is a little less critical with a composite HG than with a metal HG as the composite has a some elasticity and will fill in MINOR imperfections. The head gasket overlaps the timing plate and the excess height may cause issues. Over cutting the plate a little isn't a huge deal as it's just an oil galley. Dress the HG on both sides with a good sealant (Honda FIPG, The Right Stuff, etc) where it meets the timing plate and where the timing plate it meets the block (as specified in the TSRM) and you'll be fine as well.... But yes, at the end of the day getting it cut to match the block is the way to go.

69ho · 08-22-2013, 06:03 PM

Thanks for the reply cre. I think I am going to come up with a way to machine the plate on the block. I think removing it and trying to match the profile will not be impossible, but difficult to setup. This engine has very few miles since the previous owner had it rebuilt(<5K) and it seals well. I think I will be asking for more trouble (leaks) removing the plate than trying to do it on the block. I plan on using a stock Toyota composite HG which as you said can tolerate minor imperfections. I will seal the corners as spelled out in the service manual. Thanks for letting me use you as a bouncing board, so to speak. It has helped me arrive at workable solution.

08-22-2013, 05:40 PM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	I've never seen it on a stock block. Yes, having it cut with the block is ideal. The issue is a little less critical with a composite HG than with a metal HG as the composite has a some elasticity and will fill in MINOR imperfections. The head gasket overlaps the timing plate and the excess height may cause issues. Over cutting the plate a little isn't a huge deal as it's just an oil galley. Dress the HG on both sides with a good sealant (Honda FIPG, The Right Stuff, etc) where it meets the timing plate and where the timing plate it meets the block (as specified in the TSRM) and you'll be fine as well.... But yes, at the end of the day getting it cut to match the block is the way to go. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

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08-22-2013, 01:44 PM	#1
69ho Stock Join Date: Aug 2013 Location: Huntsville, AL Posts: 6	I meant to mention that a member of another forum said he saw the same problem with his cover after removing the head. His engine had never been apart, so apparently Toyota does not control that surface very well???

08-22-2013, 06:03 PM	#3
69ho Stock Join Date: Aug 2013 Location: Huntsville, AL Posts: 6	Thanks for the reply cre. I think I am going to come up with a way to machine the plate on the block. I think removing it and trying to match the profile will not be impossible, but difficult to setup. This engine has very few miles since the previous owner had it rebuilt(<5K) and it seals well. I think I will be asking for more trouble (leaks) removing the plate than trying to do it on the block. I plan on using a stock Toyota composite HG which as you said can tolerate minor imperfections. I will seal the corners as spelled out in the service manual. Thanks for letting me use you as a bouncing board, so to speak. It has helped me arrive at workable solution.