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TB42 and TD42 Pistons

Tech Talk for Nissan owners.

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TB42 and TD42 Pistons

Post by Big Red Toy »

The motor in my patrol is coming out to get rebuilt, just curious if the pistons sizes are the same in the tb42 as the td42 as been doing a fair bit of searching and can find allot of good gear for the petrols but not diesel so wondering if anybody knew?


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Post by CRUSHU »

Won't the diesel pistons be a lot higher compression??
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Post by MyGQ »

TD42 and TB42 share the same bore and stroke side, 96x96mm so they can fit however, TD42 pistons have a swirl chamber on them for mixing the diesel with the air in the camber. so while u could prob fit TB42 pistons into TD42, they won't work anywhere near as well
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Post by Big Red Toy »

MyGQ wrote:TD42 and TB42 share the same bore and stroke side, 96x96mm so they can fit however, TD42 pistons have a swirl chamber on them for mixing the diesel with the air in the camber. so while u could prob fit TB42 pistons into TD42, they won't work anywhere near as well
Thank you, exactly the answer i was after :D
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Post by zookjedi »

might be same bore and stroke but the compression ratio would be way different , the diesel piston itself must be longer and they wouldn,t work too well at all in a petrol and the diesel wont run at all with petrol pistons
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Post by Big Red Toy »

So am i stuck with standard pistons?
Was looking at what better quality ones i could get, or otherwise get standard & get the tops ceramic coated
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Post by beretta »

PLentyof people have had the tops ceramic coated, apparently quite effective too, I am pretty sure from memory that Hobzee had it done to his old GU comp truck. I have also heard of people on here importing pistons from the U.S. to suit, there was a dude off here that had a GU comp truck, think he was called toughnut? Am pretty sure he spoke of getting pistons form the U.S., maybe search through his members thread, don't know if he is still around or not?
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Post by PGS 4WD »

I dont know what your buget is but Specialty Pistons on Hammond Rd Dandenong can make them from blanks, speak to Patto.

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Post by bogged »

Big Red Toy wrote:So am i stuck with standard pistons?
what is wrong with std pistons?? They regularly do 300-500,000klms on GQs with turbos and shizzle.
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