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Help Vq37hr crankshaft in to vq35hr

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Old Jan 14, 2019 | 10:53 AM
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Vq37hr crankshaft in to vq35hr

Hi
I want to fix vq37hr crankshaft with connecting rod in to vq35hr
but I have vq35hr wisco piston with 11.5 compretion
I know the stoke vq35hr piston fit with no problems
but 11.5 compretion will fit ?
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Old Jan 14, 2019 | 12:27 PM
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You want to replace one VQ37 piston?
Or do you want to replace all the VQ37 pistons with Wiseco pistons for the VQ35?

It's not obvious from a quick search if the pistons will interchange. They have the same diameter but the important measurement is piston crown to wrist pin distance. If they are the same, then most likely the VQ35 pistons will work as long as the crown shape doesn't interfere with fully open valves. Check the Wiseco web site for that vital piece of information or write and ask them.
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Old Jan 14, 2019 | 04:04 PM
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Originally Posted by slartibartfast
You want to replace one VQ37 piston?
Or do you want to replace all the VQ37 pistons with Wiseco pistons for the VQ35?

It's not obvious from a quick search if the pistons will interchange. They have the same diameter but the important measurement is piston crown to wrist pin distance. If they are the same, then most likely the VQ35 pistons will work as long as the crown shape doesn't interfere with fully open valves. Check the Wiseco web site for that vital piece of information or write and ask them.
I want to rebuld my 35hr engine
and I want to change my crankshaft to 37hr with connecting rod
but I want to install 35hr pistons
the stoke one will fit directly
but the 35hr high compression pistons 11.5 will fit with no problems?
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Old Jan 14, 2019 | 06:56 PM
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I see. The VQ37 stroke is 5 mm longer than the VQ35 so I don't believe it will work with VQ35 pistons. You would have to buy custom pistons that relocates the wrist pin location or shorter connecting rods so that the pistons don't smash into the heads.
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