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Ok, lets talk belt tensioners.  The engine I picked up was a J35A4. It didnt have a belt tensioner so I ran off to the junk yard.  Grabbed one that looked just like this off a Honda Pilot.

image.png.b346f38315479749db8102bb7c995fac.png

When I got home, it looked like trying make a peg fit in the square pole.  No drilled holes in the block for the ears.  The middle bolt wasn't the right size.   WTH...

image.png.0772dc0323f48edcd28282ba27d2c415.png

 

I ended up having to go back for a fuel line, found an Odyssey motor and pulled this style off.

image.png.88ac050ff8fb1b92a7a61a6c09a03a01.png

so it looks like I have an "odyssey" block for the tensioner.

I remember reading on the old board about what size of belt to us as well as modifications to attach the tensioner to the right spot so that its not too close yet not too far.  Can anyone help me out?

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9 minutes ago, basketcase said:

Ok, lets talk belt tensioners.  The engine I picked up was a J35A4. It didnt have a belt tensioner so I ran off to the junk yard.  Grabbed one that looked just like this off a Honda Pilot.

image.png.b346f38315479749db8102bb7c995fac.png

When I got home, it looked like trying make a peg fit in the square pole.  No drilled holes in the block for the ears.  The middle bolt wasn't the right size.   WTH...

image.png.0772dc0323f48edcd28282ba27d2c415.png

 

I ended up having to go back for a fuel line, found an Odyssey motor and pulled this style off.

image.png.88ac050ff8fb1b92a7a61a6c09a03a01.png

so it looks like I have an "odyssey" block for the tensioner.

I remember reading on the old board about what size of belt to us as well as modifications to attach the tensioner to the right spot so that its not too close yet not too far.  Can anyone help me out?

So mine I used the ac bracket and cut it for my mount.

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I should add, you can make your own bracket and I have done that. Brandon mentioned using the a/c bracket and after doing so I thought it worked much better, as that is how Honda designed it. Now on the last one I did I cut a little off one of the peaks of the hex head you use for adjusting just for a little more belt clearance.

Edited by richard h
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Posted (edited)

If you do not want to use the ugly tensioner off the Odyssey, you will have to drill and tap the holes to mount the other tensioner. It is not too difficult, you just have to be careful how far you drill.

 

You can call Marked MotorSports and I believe he can give you the correct size bolts to run. 

In regards to the bet, I ran a shorter version as it spaced out the belt so it would not rub under high RPM. I used Autozone part number: 6PK1065.

Edited by Carwashguru
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4 minutes ago, Carwashguru said:

If you do not want to use the ugly tensioner off the Odyssey, you will have to drill and tap the holes to mount the other tensioner. It is not too difficult, you just have to be careful how far you drill.

 

You can call Marked MotorSports and I believe he can give you the correct size bolts to run. 

In regards to the bet, I ran a shorter version as it spaced out the belt so it would not rub under high RPM. I used Autozone part number: 6PK1065.

Now that I think about it, I pulled the bolts off an Acura at the junk yard. I think you can use them of a J32. I cant remember which model of Acura though. I am sure someone can chime in.

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You can get a power steering pump bracket that is adjustable, and ditch the tensioner all together, That's what I did on mine before installing into chassis, dirty from ocatillo and spilled drink cooler! no oil leaks here

16301190558587590090834574653015.jpg

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16 hours ago, 2turbofords said:

You can get a power steering pump bracket that is adjustable, and ditch the tensioner all together, That's what I did on mine before installing into chassis, dirty from ocatillo and spilled drink cooler! no oil leaks here

16301190558587590090834574653015.jpg

Where did you get that crankshaft pulley? Does it still retain the factory dampener?

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Finally got my brand new oem Honda engine running the lifters were super loud and kept throwing misfire codes and would big around 4K RPM. Decided to do a valve adjustment and looks like these heads do not have jamn nuts. This does not look correct. These were brand new in box oem heads from Honda. Can anyone verify if there J35A4 has them?

image.jpg

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10 hours ago, Carwashguru said:

Finally got my brand new oem Honda engine running the lifters were super loud and kept throwing misfire codes and would big around 4K RPM. Decided to do a valve adjustment and looks like these heads do not have jamn nuts. This does not look correct. These were brand new in box oem heads from Honda. Can anyone verify if there J35A4 has them?

image.jpg

I've had 2 j35a4 engines, both had jam nuts. Otherwise you have self adjusting valves....

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does anyone make J35 turbo mount headers for buggy applications? or are they mostly custom fabbed? 

interested in how much clearance I would need behind the crank and in front of the engine subframe for a turbo set-up. 

thx

 

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45 minutes ago, Manxaru said:

does anyone make J35 turbo mount headers for buggy applications? or are they mostly custom fabbed? 

interested in how much clearance I would need behind the crank and in front of the engine subframe for a turbo set-up. 

thx

 

Reach out to Dave at HotHead Headers. He can set you up with anything you need turbo header related. 

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On 8/27/2021 at 8:07 AM, basketcase said:

Ok, lets talk belt tensioners.  The engine I picked up was a J35A4. It didnt have a belt tensioner so I ran off to the junk yard.  Grabbed one that looked just like this off a Honda Pilot.

image.png.b346f38315479749db8102bb7c995fac.png

When I got home, it looked like trying make a peg fit in the square pole.  No drilled holes in the block for the ears.  The middle bolt wasn't the right size.   WTH...

image.png.0772dc0323f48edcd28282ba27d2c415.png

 

I ended up having to go back for a fuel line, found an Odyssey motor and pulled this style off.

image.png.88ac050ff8fb1b92a7a61a6c09a03a01.png

so it looks like I have an "odyssey" block for the tensioner.

I remember reading on the old board about what size of belt to us as well as modifications to attach the tensioner to the right spot so that its not too close yet not too far.  Can anyone help me out?

I just drilled and tapped my block to fit the other smaller tensioner.  Pull the oil pan off and shove some paper towels up where you are drilling as one of the holes will go through.  Tap them and seal the one hole that goes through when installing your tensioner, and your good to go.  I pulled the paper towel out and used some degreaser spray to clean out the block of any shavings.  No problems with it. 

Edited by LtPyro
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2 hours ago, LtPyro said:

I just drilled and tapped my block to fit the other smaller tensioner.  Pull the oil pan off and shove some paper towels up where you are drilling as one of the holes will go through.  Tap them and seal the one hole that goes through when installing your tensioner, and your good to go.  I pulled the paper towel out and used some degreaser spray to clean out the block of any shavings.  No problems with it. 

I havent looked at the center hole to see if it misses that large one that I have, but what did u do with that?  Also, which belt did you use.  Looks like there is one that is 42-7/8" (K060423) and 42-3/4" (6PK1065).  Only 1/8" of inch, but still feeling I might just do the shorter one as is.

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Posted (edited)

I would recommend the shorter belt. I tried running the longer one at it would rub together at higher RPM's. 

Edited by Carwashguru
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any suggestions for a honda j35 turbo dyno tuner in the LA area? 

fwiw - its a low output build....pump gas, approx 8 psi boost

thx

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5 hours ago, Manxaru said:

any suggestions for a honda j35 turbo dyno tuner in the LA area? 

fwiw - its a low output build....pump gas, approx 8 psi boost

thx

Really depends on what ECU you are running

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37 minutes ago, Carwashguru said:

Really depends on what ECU you are running

AEM series 2 plug and play

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1 hour ago, Manxaru said:

AEM series 2 plug and play

 

1 hour ago, Manxaru said:

AEM series 2 plug and play

I have heard good things about Church’s automotive testing and also Ericks racing. Both are supposed to be great with Honda/AEM. 

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21 hours ago, basketcase said:

I havent looked at the center hole to see if it misses that large one that I have, but what did u do with that?  Also, which belt did you use.  Looks like there is one that is 42-7/8" (K060423) and 42-3/4" (6PK1065).  Only 1/8" of inch, but still feeling I might just do the shorter one as is.

I plugged the larger hole with an aluminum rod, but I don't think its necessary.  I don't remember off hand which belt I have but I would go with the shorter one. 

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17 hours ago, Manxaru said:

any suggestions for a honda j35 turbo dyno tuner in the LA area? 

fwiw - its a low output build....pump gas, approx 8 psi boost

thx

 

11 hours ago, Manxaru said:

AEM series 2 plug and play

I'm running the same ECU at 10psi with pump gas.  Been running it for two seasons.  I have an intercooler on mine and if I wasn't building another engine for more boost I probably wouldn't spend the money on a tune unless I was seeing/feeling/hearing start to knock some.  But there is room to squeeze more HP out of that setup.  I was going to try and get ahold of Dunehoon for my tuning, but if I can't get time there I'd go with the tuners suggested above.

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6 hours ago, LtPyro said:

 

I'm running the same ECU at 10psi with pump gas.  Been running it for two seasons.  I have an intercooler on mine and if I wasn't building another engine for more boost I probably wouldn't spend the money on a tune unless I was seeing/feeling/hearing start to knock some.  But there is room to squeeze more HP out of that setup.  I was going to try and get ahold of Dunehoon for my tuning, but if I can't get time there I'd go with the tuners suggested above.

Which motor do you have? J35a1? and is you motor stock? or did you put in lower compression, forged pistons and rods, etc?

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Luckily i have an j35 a1 and it uses a simple tensioner that does not have the shock absorber thingy.As for belt i use the one posted last 3 numbers 623.

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On 8/31/2021 at 11:57 AM, Manxaru said:

Which motor do you have? J35a1? and is you motor stock? or did you put in lower compression, forged pistons and rods, etc?

It’s a j35a4, all stock.  I’m currently building up a second j35a4 with rods, pistons, etc.. to handle a bit more abuse.

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Here's a little something Honda guys might be interested in.  A fan switch that comes on around 175* versus the 205 the OE unit.

https://www.ebay.com/itm/154133951085?hash=item23e319726d:g:AX4AAOSwNDJaa7A4

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