alexbnk
New Member
- Joined
- May 12, 2022
- Messages
- 5
- Country Flag
I have towed 1.5 tons for 150KM in 30C and the engine overheated occasionally.
Due to a balancer shaft bearing failure that cause zero oil pressure i had to take it apart in order to replace the bearings and one shaft.
After removing the head i was amazed to see that most of the water passages between the head and the engine block are blocked by the OE head gasket.
I guess that's a normal sight for the 1KZ veterans but for me it was a shocking first despite building many engines over the years.
The strange thing is that when searching for a head gasket i found some aftermarket ones that do not block those passages... someone mentioned somewhere that the vehicles for the Japanese market are COLD climate tuned and that there's a HOT climate version with another type of gasket (non restrictive).
Could this be the answer to the large numbers of cracked heads ?
All i found is theories and people trying to understand this issue in posts that are a decade old ....
I hope this issue was finally understood after so many years
Please let me know, THX
Due to a balancer shaft bearing failure that cause zero oil pressure i had to take it apart in order to replace the bearings and one shaft.
After removing the head i was amazed to see that most of the water passages between the head and the engine block are blocked by the OE head gasket.
I guess that's a normal sight for the 1KZ veterans but for me it was a shocking first despite building many engines over the years.
The strange thing is that when searching for a head gasket i found some aftermarket ones that do not block those passages... someone mentioned somewhere that the vehicles for the Japanese market are COLD climate tuned and that there's a HOT climate version with another type of gasket (non restrictive).
Could this be the answer to the large numbers of cracked heads ?
All i found is theories and people trying to understand this issue in posts that are a decade old ....
I hope this issue was finally understood after so many years
Please let me know, THX