Rank: Member
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Joined: 28/04/2005(UTC)
Posts: 758
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Hi All,
Just trying to work out whether the HQ 253 actually needs a timing chanin damper/tensioner on not.
Apparently later model 308s ie VBs dont have them at all. CROW CAMS say the V8s dont need them.
Whats the answer ? Put one back in, if I can get one, or just fit the CROW kit with not tensioner ? My last one was cut to pieces...probably the 1974 original.
Thanks in advance John
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Rank: Member
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Joined: 28/04/2005(UTC)
Posts: 758
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I may have found an answer...HQs had em, by HZ they were gone. The old part of 7436226 isnt on GMH parts base anymore either.
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Rank: Member
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Joined: 28/12/2011(UTC)
Posts: 6
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I TO HAVE THE SAME PROBLEM, WHEAR CAN I GET A TIMING GUIDE FOR MY 308 AS THE ONE IN IT HAS COME APART. I WOULD LIKE TO PUT ONE BACK IN IT. ALSO THE CAMSHAFT HAS INDEX MARKS ON IT , IT SEEMS TO BE SET AT +8 DEGREES WHEAR SHOULD IT BE SET FOR NORMAL STREET USE.THIS ENGINE WAS BUILT AS A DRAG ENGINE, BUT I AM PUTTING IT INTO MY HZ 2 TONE FOR STREET USE ONLY. SORRY FOR SPELLING, ANDREW STEPHENSON [email protected]
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Rank: Member
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Joined: 17/09/2010(UTC)
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You don't have drag use, street use settings on the timing gear for camshafts. The 8 degrees is where the camshaft was dialed into for best performance. You can't set it at 0 degrees thinking that is for street use and expect it to work as designed and deliver power. Leave it alone, or buy another cam and lifters with a milder grind and install. Remember though, you should still dial in any cam that has a grind other than standard.
Cheers
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I have never used a tensioner/damper. When Holden were using a 3SR62 (62 link single row chain) it may have been needed to help compensate for the excess wear. With a double row 3DR62 chain there is no need. Remember metallurgy and manufacturing technology have come a long way in 40 years.
PS the Holden V8 3DR62 chain is the same as the Toyota 18R series motors. If you get stuck there's an alternative.
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