ChasR
RR Helper
motivation
Posts: 10,189
Club RR Member Number: 170
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How do mechanics know.....ChasR
@chasr
Club Retro Rides Member 170
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Dec 25, 2018 14:41:51 GMT
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Do garages even still try tipexing up floating cam pulley engines and is that even a thing still? Those Renault F4R and K4M engines with dephashers have been around for over like 20 years! I know the 172/182 is more awkward as access is incredibly tight and the cam locking tool needs to fit exactly + tightly. Cheap locking tools aren't that exact. If it doesn't, you loose a fair power. Hence why it's better done at decent specialist. The top end locking tools are the same for all of the engines. The crank locking pin however is different on the 172s ; they are a Renault only part and even then, care must be taken to ensure it goes into the right hole on the crank, but it is obvious if you get this part wrong. But yes, it does. Why spend £200 on tools when the 'old fashioned' way worked? It worked fine on the CVHs, Pintos etc... And no, I'm not condoning the above, but I can see why garages do it, and TBH it's another reason to go to a specialist as you said.
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SiC
Part of things
Posts: 23
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Dec 25, 2018 14:50:35 GMT
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The crank locking pin however is different on the 172s ; they are a Renault only part and even then, care must be taken to ensure it goes into the right hole on the crank, but it is obvious if you get this part wrong. That's interesting, I didn't know that. How does the locking pin on the 172/182 F4R differ from, say the F4Rt used in the Mégane or even the lower powered cooking F4R used in the Laguna, et al? (I forget the derivative numbers for each spec...)
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Projects/Classics: 1974 MGB GT (it's best not to talk about this one), 1972 Austin 1100 (The Purple Peril that has consumed a lot of fresh metal, welding gas and wire so far) Daily drivers: 2010 Audi A4 (my wife seems to have taken ownership of this), 2008 Audi TT (I hate them, supposed to have been a stop gap but currently stuck with it), Specialized Allez (cycling to work allows me to eat loads of cake)
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ChasR
RR Helper
motivation
Posts: 10,189
Club RR Member Number: 170
|
How do mechanics know.....ChasR
@chasr
Club Retro Rides Member 170
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Dec 29, 2018 19:29:20 GMT
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The crank locking pin however is different on the 172s ; they are a Renault only part and even then, care must be taken to ensure it goes into the right hole on the crank, but it is obvious if you get this part wrong. That's interesting, I didn't know that. How does the locking pin on the 172/182 F4R differ from, say the F4Rt used in the Mégane or even the lower powered cooking F4R used in the Laguna, et al? (I forget the derivative numbers for each spec...) It’s been a while since I’ve been on one. From memory, the more “common” pins allow for more play at the crank.
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Dec 30, 2018 11:28:13 GMT
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Tapping engine with hammer £2 Knowing where to tap £190
innit
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