GQ diesel (TD42) pre & post '93?

Engines and Engine Systems
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ricster
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Re: GQ diesel (TD42) pre & post '93?

Post by ricster » 03 Feb 2014 16:08

Frans ... A little off topic, but do you recall those pistons you got for me from Masterparts? Do you know if those pistons are thicker than the Nissan pistons? I was told that the old TD42 (silver top) had thicker piston tops to handle the heat better, but when Nissan changed the TD42 a little to make it lighter, I think thats where the different gudgeon pin sizes come from, the piston tops were made a little thinner. Do you know what the difference between the old and new TD42 piston thicknesses are?

By the way, Frans that motor of mine runs like a dream, I still battle a bit with high EGT's but just have to watch it nicely. she still has loads of power and done 70 000 km on it already!!
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Cedric
Nissan Patrol GL 4.2 Diesel Turbo (Iron Maiden)
Nissan SANI 3.0 V6 4x4 (SOLD)
Isuzu KB 280 DT 2x4 ('ol Smokey) - SOLD
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tour de frans
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Re: GQ diesel (TD42) pre & post '93?

Post by tour de frans » 03 Feb 2014 17:09

Cedric, Only reason for the thikker crown is to allow for the channels inside the piston head, the piston cooler feed them. Remember, if the cooling stops for what or other reason, that piston become weaker than the non turbo one. Yes the gudgeon pin are thinner on the non turbo or black top engine. The word thinner wont bother me, you could hang a tanker on those pins.
I am glad you happy with your engine and it's going strong. :thumbup:
Rdgs
Frans
Aka: Ou Grootte
99' GU Patrol, LS1 V8 with std G/box custom convertion.Hydraulic radiator fan-motor.

The 4.2 Diesel Custom Turbo engine- retired
The 4.0 Falcon Engine- retired

Tour de frans - het niks met n bicycle uit te waai nie.

User avatar
ricster
Patrolman 1000+
Patrolman 1000+
Posts: 5943
Joined: 13 Jan 2010 11:16
Full Name: Cedric Warner
Nickname: Cedric
Home Town: Alberton Gauteng
Current 4x4: '99 Nissan Patrol 4.2 Turbo Diesel
Home Language: English
Location: LA..... No not Los Angles ..... Lower Alberton, Gauteng
Has thanked: 244 times
Been thanked: 255 times

Re: GQ diesel (TD42) pre & post '93?

Post by ricster » 04 Feb 2014 13:21

Ok cool .... so those oil squirters that are shown on the pics on the first page in my motor will still cool the piston down even if there are no channels on the piston tops?
Regards
Cedric
Nissan Patrol GL 4.2 Diesel Turbo (Iron Maiden)
Nissan SANI 3.0 V6 4x4 (SOLD)
Isuzu KB 280 DT 2x4 ('ol Smokey) - SOLD
Suzuki TL 1000R "V twin" (Growler) - SOLD

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tour de frans
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Re: GQ diesel (TD42) pre & post '93?

Post by tour de frans » 04 Feb 2014 15:11

Yip
Aka: Ou Grootte
99' GU Patrol, LS1 V8 with std G/box custom convertion.Hydraulic radiator fan-motor.

The 4.2 Diesel Custom Turbo engine- retired
The 4.0 Falcon Engine- retired

Tour de frans - het niks met n bicycle uit te waai nie.

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