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Mailbag: 93 Allante Northstar headbolt?

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Mailbag: is my 1993 allante one of the northstar engine have a headbolt problem

Yes, the 1993 Allante offered the 4.6L DOHC Northstar power train.  No, you may or may not ever have a head bolt issue with it.

How is your Allante doing so far?


2016 Cadillac ATS-V gray/black

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Any engine that uses a aluminum engine block can have pulled head bolts in the block. The Toyota 2.4L engine has a very common problem with head bolts pulling.

On Northstars, there are 3 Time-Sert kits available. There are also Kent Moore kits available. The KM kits use Time-Sert tooling, but are incomplete (by design) and need parts from other KM kits to perform repairs.

J-42385-500 is used on blocks up thru 1999.

J-42385-2000 is used on blocks 2000 to 2003.

J-42385-2030 is used on 2004 and newer blocks.

All 3 Northstar kits are available on a rental basis. Kits for Toyotas are also available for rental.


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