Performance Valve?

codster.cab · 10-21-2011, 05:12 PM

ya, i was looking at the valves and they are oversized. thank you alot.
another question, my supra smokes on a cold start, a big cloud of white smoke just for like 1 minute if that. and also everytime I shift under i pressure. does this sound like valve seals?

87hilux7mge · 10-22-2011, 04:22 AM

ferrea valves are really good.

if you want a cheap, effective solution, just disassemble the head (you will need a valve spring compressor, large C-clamp type.) label all the valves, springs, retainers, lifter buckets, shims and keepers in ziplock bags, then polish the valves and lap them yourself (several online tutorials for this, just check to make sure the valves dont have excessive play in the valve guides.)

i saved a good 300 bux doing my own, and all my valves hold 20+inches of vacuum.

u can also do a valve spring upgrade by getting the BBC inner springs from comp cams and install them instead of stock ones. more seat pressure and its about 60 bux for 24 of them (they are sold in sets of 12, hm, wonder why....?)

i have a buddy with some ferrea valves in his 7m head, and they look titties tho.

cre · 10-22-2011, 08:38 PM

After doing ANY valve work check the lifter clearances. Even rotating an old, worn in bucket can cause a decent shift. It's really something you should just do anyway while everything is off.

87hilux7mge · 10-23-2011, 12:27 AM

Quote:

Originally Posted by cre

After doing ANY valve work check the lifter clearances. Even rotating an old, worn in bucket can cause a decent shift. It's really something you should just do anyway while everything is off.

yes true, i forgot to mention that. checked all mine, and amazingly, nothing was out....ended up doing it 3 times just to be sure, but everything was pretty much dead center, a couple on the loose side, but still in spec.

when you check the clearances, make sure to rotate the cams a few times, just to get any kind of play out.

codster.cab · 10-29-2011, 04:02 PM

thanx alot everybody, all this info is a big help...
im looking at the brian crower valves and also cams depending on my budget.
another question, I want to put an HKS head gasket, any suggestions on how far I should deck the Head? and how thick of a gasket?
thank you all again. i will post some pics once my phone is working again

87hilux7mge · 10-29-2011, 06:22 PM

take the block to a reputable shop (preferably one that is familiar with these motors) and have them check everything on the block (inspect, clean, magnaflux, then advise to you their machining recommendations). the less you have to mill the block the better. u mostly just want to smoothest surface for the hks gasket. lapping the surface of the block is the best way to get it smoothest, but its also time consuming and labor intensive. some machine shops will do this, like i said tho, its spendy.

i opted out of lapping the block/head. ended up using a product called gasqasinch. we will see how it works, but ive got faith. when i pulled the head off the other day, lets just say it was a PITA with the gasqasinch on there.

i got the 1.2mm gasket, but when the machine shop tells you how much needs to be taken off the block and head, you can take that number and subtract it from the original height and buy the gasket accordingly. i just opted to get adjustable cam gears and only worry about gasket price. 400+ for a gasket was a lil ridiculous in my book....

cre · 10-29-2011, 06:45 PM

In most builds you don't want to raise the compression ratio so you'll want one that's 1.37mm + whatever they cut from the block + whatever they cut from the head. You don't want them to take any more material off the block than necessary

Note that while metal head gaskets are VERY finicky about the deck surface and smoothness the HKS' Stopper HG (the one I suspect you're looking at) is the pain in the ass. I think it requires an RA finer than 18 or 15.... a lot of older shops can't produce this and if it's rougher than that it WILL blow.

Unless you're reusing a given MHG you want to read the MSDS of ANY chemical before you apply it to your block, head or HG.... Most gasket dressings contain chemicals which will cause the sealant coating which most MHGs already come with to crack, ripple, bluster, peel, or just turn to an easy to blow out liquid goop..... B A D. I'm a Hylomar fan myself; I know some of their products are safe for Viton and similar coatings but a lot of their products aren't be careful if you choose to add a sealer, it's a stupid reason to have to rebuild. I advise against it unless you have a really good reason for it... As I said, most MHGs already have a sealant on them anyway.

codster.cab · 10-29-2011, 07:04 PM

thanx again, for everything, I think i am goin to look for a nother engine and just strip it and build it slowly, so i can still drive mine during the process.
there is alot of N/A out here with good motors, last time I was on here about2yrs ago with my 7mge, somebody told me that there is no big difference between the engines besides the tubo set up? is this true>?

10-22-2011, 04:22 AM	#2
87hilux7mge walbro fp Join Date: Dec 2010 Location: spokane Posts: 479	ferrea valves are really good. if you want a cheap, effective solution, just disassemble the head (you will need a valve spring compressor, large C-clamp type.) label all the valves, springs, retainers, lifter buckets, shims and keepers in ziplock bags, then polish the valves and lap them yourself (several online tutorials for this, just check to make sure the valves dont have excessive play in the valve guides.) i saved a good 300 bux doing my own, and all my valves hold 20+inches of vacuum. u can also do a valve spring upgrade by getting the BBC inner springs from comp cams and install them instead of stock ones. more seat pressure and its about 60 bux for 24 of them (they are sold in sets of 12, hm, wonder why....?) i have a buddy with some ferrea valves in his 7m head, and they look titties tho. __________________ 87 toyota 4x4 single cab short box pickup, 7MGZE.

10-22-2011, 08:38 PM	#3
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	After doing ANY valve work check the lifter clearances. Even rotating an old, worn in bucket can cause a decent shift. It's really something you should just do anyway while everything is off. __________________ 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 --->

10-29-2011, 06:22 PM	#6
87hilux7mge walbro fp Join Date: Dec 2010 Location: spokane Posts: 479	take the block to a reputable shop (preferably one that is familiar with these motors) and have them check everything on the block (inspect, clean, magnaflux, then advise to you their machining recommendations). the less you have to mill the block the better. u mostly just want to smoothest surface for the hks gasket. lapping the surface of the block is the best way to get it smoothest, but its also time consuming and labor intensive. some machine shops will do this, like i said tho, its spendy. i opted out of lapping the block/head. ended up using a product called gasqasinch. we will see how it works, but ive got faith. when i pulled the head off the other day, lets just say it was a PITA with the gasqasinch on there. i got the 1.2mm gasket, but when the machine shop tells you how much needs to be taken off the block and head, you can take that number and subtract it from the original height and buy the gasket accordingly. i just opted to get adjustable cam gears and only worry about gasket price. 400+ for a gasket was a lil ridiculous in my book.... __________________ 87 toyota 4x4 single cab short box pickup, 7MGZE.

10-29-2011, 06:45 PM	#7
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	In most builds you don't want to raise the compression ratio so you'll want one that's 1.37mm + whatever they cut from the block + whatever they cut from the head. You don't want them to take any more material off the block than necessary Note that while metal head gaskets are VERY finicky about the deck surface and smoothness the HKS' Stopper HG (the one I suspect you're looking at) is the pain in the ass. I think it requires an RA finer than 18 or 15.... a lot of older shops can't produce this and if it's rougher than that it WILL blow. Unless you're reusing a given MHG you want to read the MSDS of ANY chemical before you apply it to your block, head or HG.... Most gasket dressings contain chemicals which will cause the sealant coating which most MHGs already come with to crack, ripple, bluster, peel, or just turn to an easy to blow out liquid goop..... B A D. I'm a Hylomar fan myself; I know some of their products are safe for Viton and similar coatings but a lot of their products aren't be careful if you choose to add a sealer, it's a stupid reason to have to rebuild. I advise against it unless you have a really good reason for it... As I said, most MHGs already have a sealant on them anyway. __________________ 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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10-21-2011, 05:12 PM	#1
codster.cab Stock Join Date: Oct 2011 Location: Glendale AZ Posts: 7	ya, i was looking at the valves and they are oversized. thank you alot. another question, my supra smokes on a cold start, a big cloud of white smoke just for like 1 minute if that. and also everytime I shift under i pressure. does this sound like valve seals?

10-29-2011, 04:02 PM	#5
codster.cab Stock Join Date: Oct 2011 Location: Glendale AZ Posts: 7	thanx alot everybody, all this info is a big help... im looking at the brian crower valves and also cams depending on my budget. another question, I want to put an HKS head gasket, any suggestions on how far I should deck the Head? and how thick of a gasket? thank you all again. i will post some pics once my phone is working again

10-29-2011, 07:04 PM	#8
codster.cab Stock Join Date: Oct 2011 Location: Glendale AZ Posts: 7	thanx again, for everything, I think i am goin to look for a nother engine and just strip it and build it slowly, so i can still drive mine during the process. there is alot of N/A out here with good motors, last time I was on here about2yrs ago with my 7mge, somebody told me that there is no big difference between the engines besides the tubo set up? is this true>?