Author Topic: ESR 330 Failure (Read 50170 times)

rsss396 · « **Reply #15 on:** July 10, 2013, 03:32:06 PM »

would you consider blocking the intake side water passage right at the rear of the head
or even blocking the rear 3 passages then milling or making only a trench equal to a 1/4 hole?

The cylinder IMO would benefit more from coolant flow being increased toward the front of the cylinder wear the exhaust port is.

Prodesign coolheads with o-rings for the CR500's that have the water entering the rear of the cylinder like the 250r create this short circuit also.

It does look like ESR restricts this flow better than cool-head did but it does seam to have room for improvement.

To block the passages you would use a epoxy to fill the hole then mill smaller slots for new smaller passages.

rsss396 · « **Reply #16 on:** July 10, 2013, 03:33:23 PM »

And yes the bottom side does look just right maybe we should check the top side

mx250r91 · « **Reply #17 on:** July 10, 2013, 05:54:16 PM »

On my stock cylinder with o-ring cool head I blocked off the 3 intake side coolant jackets with aluminum epoxy and then drilled them out to match the holes in the stock head gasket. So far so good. I got the idea from Jason all250r's forum but its not working so I can't show the link with pictures. I like how the CR250 pushes water right from the water pump to the front of the cylinder and up through the exhaust port jackets, this would be the ideal setup. Interestingly my pro-x jug has two plugs under the exhaust water jacket does the ESR cylinder have this?

rsss396 · « **Reply #18 on:** July 10, 2013, 06:22:46 PM »

Yes the front of the cylinder should be cooled first, the cr500's switched to a front side inlet to achieve better exhaust port side cooling like the cr250 did, its to bad CP did not do this on their cylinders for the 250r.

F-Red · « **Reply #19 on:** July 10, 2013, 06:25:38 PM »

Quote from: etccb;2567

Check it for sure. There were a few reports from around dec 2011 of a possible leak from the ex stud threads breaking into the water jacket on a few cylinders that could pooibly lead to some misc problems. Seal the threads up when putting it back together and always do all of the leak tests.
Good luck.

I'll check this out.

Quote from: rsss396;2574

would you consider blocking the intake side water passage right at the rear of the head
or even blocking the rear 3 passages then milling or making only a trench equal to a 1/4 hole?

The cylinder IMO would benefit more from coolant flow being increased toward the front of the cylinder wear the exhaust port is.

Prodesign coolheads with o-rings for the CR500's that have the water entering the rear of the cylinder like the 250r create this short circuit also.

It does look like ESR restricts this flow better than cool-head did but it does seam to have room for improvement.

To block the passages you would use a epoxy to fill the hole then mill smaller slots for new smaller passages.

That's what I'm going to do. Epoxy up the three back ports and mill out a slot.

Quote from: rsss396;2575

And yes the bottom side does look just right maybe we should check the top side

Top sides fine too!

mx250r91 · « **Reply #20 on:** July 10, 2013, 06:42:51 PM »

Here is the epoxy I used, the H-450 kit: http://www.hypoxy.com/aluminum_repair_kits.htm

F-Red · « **Reply #21 on:** July 10, 2013, 06:54:01 PM »

Quote from: mx250r91;2611

Interestingly my pro-x jug has two plugs under the exhaust water jacket does the ESR cylinder have this?

I don't understand, where this is on the jug?

Quote from: mx250r91;2622

Here is the epoxy I used, the H-450 kit: http://www.hypoxy.com/aluminum_repair_kits.htm

What size kit did you use? Approximately, how much was needed?

mx250r91 · « **Reply #22 on:** July 10, 2013, 07:04:10 PM »

Quote from: F-Red;2623

I don't understand, where this is on the jug?

Under the front, the pocket that gets covered with the base gasket.

Quote from: F-Red;2623

What size kit did you use? Approximately, how much was needed?

The H-450 6.5oz kit. It didn't take much.

BJR88250r · « **Reply #23 on:** July 11, 2013, 10:01:11 AM »

Same situation I've got goin on. On 3rd set up for my esr310 cylinder payed to send it back to them twice and have price piston kits. So definitely got more tied up then I wanted too in this cylinder. They claimed I musta been sucking dirt. (That was not the case to say the least) Then it went from that to I wasn't running there piston Tom said.i believe they definitely have casting issues mine keep locking up on exhaust side with race fuel n rich jetting to boot and it was there pump gas dome setup. Did it within first hour of first run both times. If you look up in around exhaust port there casting leaves a lot to be desired. Esr agreed to send me a replacement cylinder but that was in end of march and it still has not showed lol. Every time I call time I get some sorta excuse about how busy Eddie is. There customer service leaves a lot to be desired.

F-Red · « **Reply #24 on:** July 11, 2013, 10:17:24 AM »

Quote from: mx250r91;2626

Under the front, the pocket that gets covered with the base gasket.

I'll check.

Quote from: mx250r91;2626

The H-450 6.5oz kit. It didn't take much.

Thanks.

Quote from: BJR88250r;2785

Same situation I've got goin on. On 3rd set up for my esr310 cylinder payed to send it back to them twice and have price piston kits. So definitely got more tied up then I wanted too in this cylinder. They claimed I musta been sucking dirt. (That was not the case to say the least) Then it went from that to I wasn't running there piston Tom said.i believe they definitely have casting issues mine keep locking up on exhaust side with race fuel n rich jetting to boot and it was there pump gas dome setup. Did it within first hour of first run both times. If you look up in around exhaust port there casting leaves a lot to be desired. Esr agreed to send me a replacement cylinder but that was in end of march and it still has not showed lol. Every time I call time I get some sorta excuse about how busy Eddie is. There customer service leaves a lot to be desired.

Sorry for your misfortune. It makes one feel a little better, that it isn't just me. This will be my last time, if it doesn't work, using this cylinder.

BJR88250r · « **Reply #25 on:** July 11, 2013, 11:04:07 AM »

Yeah not trying to rain on your parade but I couldn't get cylinder to work. Shipping and piston kits get expensive anyway. Put my lrd prox 310 on and never had a prob since. Just figured I try esr out for the price but shoulda invested money somewhere else instead of there cylinder kit. It's good they make cylinder kits for the r though I give them that. I'll be happy if they hold up to there end of the deal and send my replacement. Will see I guess. Been 3.5 months now already. Good thing I had other cylinders to run. It's good you have Neil's porting too you prolly wouldn't have been happy with their precast ports either.

Langbolt · « **Reply #26 on:** July 11, 2013, 12:29:49 PM »

Have a look in the coolant passage under the Stud boss on the exhaust side.....Does it look like this ?

[ATTACH=CONFIG]322[/ATTACH]

Langbolt · « **Reply #27 on:** July 11, 2013, 12:31:23 PM »

If so....you need to open it up to at least 1/4" gap.....Like this

[ATTACH=CONFIG]323[/ATTACH]

F-Red · « **Reply #28 on:** July 11, 2013, 01:08:36 PM »

Quote from: BJR88250r;2818

It's good you have Neil's porting too you prolly wouldn't have been happy with their precast ports either.

Neil's porting is awesome. This thing was quick and would pull to the moon. That's why I'm trying to do everything possible, to save it from the sledge hammer! :fighting0061:

Quote from: Langbolt;2851

If so....you need to open it up to at least 1/4" gap.....Like this

I'll look tonight. So you would remove material, down towards the powervalve casting area?

[ATTACH=CONFIG]323[/ATTACH]

udontknowme · « **Reply #29 on:** July 12, 2013, 01:27:47 AM »

mines been at crankworks about 5weeks. starting to get worried. needed some machinning but nothing that couldnt be done in a few hours. worst case they dropped it on the floor and cant find a replacment. best case theyre just slow with 100 cranks in front of me