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4A-G con-rod bolts - strech or torque?
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10-08-2005, 03:00 PM
Post: #1
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4A-G con-rod bolts - strech or torque?
Im reuilding the bottom end..
my crank-bearings are loud as hell.. so im wonderig do i have to replace the bolts as well? are they strech or normal bolts, can they be reused? what els do i have to replace, other than grinding/polsihing the crakshaft, new bearings and gasket? |
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10-09-2005, 12:35 AM
Post: #2
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4A-G con-rod bolts - strech or torque?
Crank bearings don't tend to get worn out easily I guess!
Rod bearings do, and the bolts are never to be reused (read Bill Sherwood's page)! Don't know about crank bolts... Best regards |
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10-10-2005, 12:58 AM
Post: #3
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4A-G con-rod bolts - strech or torque?
Tnx for the info.
Se ya! |
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10-10-2005, 08:40 AM
Post: #4
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4A-G con-rod bolts - strech or torque?
I would get some ARP bolts or just toyota OEM rod&crank bolts. These bolts are the nr.1 cause of catastrophic engine failure at high rpm...If they break you will have holes in your engine..
FABRICA MI DIEM, PVNC! |
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10-10-2005, 03:51 PM
Post: #5
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4A-G con-rod bolts - strech or torque?
So do i have to buy just new rod bolts, or the other "main bearing" bolts also (the ones that go into the bottom of the engine block?)
btw.. does 4ag hae a solid iron block w/ no sleeves, or does it have sleeves? |
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10-10-2005, 04:03 PM
Post: #6
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4A-G con-rod bolts - strech or torque?
You got it correctly...cast iron, no sleeves. I dunno about the main bearing bolts though. The rodbolts take most of the stress as far as I know, but I dont know if the main bearing bolts allow re-use. Maybe the factoy manual has something to say on the subject? Otherwise you could try to pm Billzilla, he know's these things very well.
FABRICA MI DIEM, PVNC! |
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10-11-2005, 01:21 AM
Post: #7
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4A-G con-rod bolts - strech or torque?
Run some ARM mains abd rod bolts, for the money the security is well worth it.
Rod bolts you should ALWAYS measure using a stretch gauge, torque has far too many variable which alter readings. Mains you cannot measure stretch, but make sure your torque gauge is very very accurate, a good beam or dial type. Check the crank first, it might not need grinding, just a very very light polish, then you wont need to go oversize on the bearings. |
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