Crashtd420 Posted March 30, 2023 Report Share Posted March 30, 2023 Also even closed I'm sure there is some heat transfer from the circulating coolant in the block.... Just enough to warm the heater core..... Quote Link to comment
mainer311 Posted March 30, 2023 Report Share Posted March 30, 2023 Yeah, extra block cooling. Not me. I’m probably sweating my ass off. The back of L series blocks are relatively stagnant in terms of flow, so by leaving the heater core open, it allows the water to flow out the back, get cooled from ambient air in the cab, and then return to the pump. Quote Link to comment
datzenmike Posted March 30, 2023 Report Share Posted March 30, 2023 So in the summer when the heater blocks flow this is a problem for the block???? What about L series engines in tropics that don't even have a heater option? There is circulation provided by the two coolant flow through the intake runners? You're over thinking something so simple. Drive it this summer but in the heat keep an eye on your heat gauge. When it over heats or runs too hot fold the hose into a kink and tie with a zap strap to get home. Quote Link to comment
mainer311 Posted March 30, 2023 Report Share Posted March 30, 2023 (edited) 34 minutes ago, datzenmike said: So in the summer when the heater blocks flow this is a problem for the block???? What about L series engines in tropics that don't even have a heater option? There is circulation provided by the two coolant flow through the intake runners? There's a stagnant area on the left rear portion of the block when the heater outlet is blocked off. Even without CFD, it's easy to see. Not to mention, he's running Mikunis with no water outlets in the manifold. If I were him, I wouldn't block off that area. With the heater core there and functioning, there's an inrush of coolant, improving flow there. And the heater is acting as a second radiator for the rear of the block. With his heater core removed and/or blocked off, the only outlet he currently has is the t-stat. Edited March 30, 2023 by mainer311 Quote Link to comment
d.p Posted March 30, 2023 Author Report Share Posted March 30, 2023 Lots of good information. I dropped the core off at the radiator shop and they said they can fix it no problem. Should have it back in a couple days. Now I need a fan to make me whole again. 2 Quote Link to comment
Crashtd420 Posted March 30, 2023 Report Share Posted March 30, 2023 14 minutes ago, d.p said: Lots of good information. I dropped the core off at the radiator shop and they said they can fix it no problem. Should have it back in a couple days. Now I need a fan to make me whole again. I should just send you the fan I have.... truth is I usually just open the air vent to get heat, i never really use the fan in my truck.... I text you about it.... Quote Link to comment
banzai510(hainz) Posted March 30, 2023 Report Share Posted March 30, 2023 take photos of the fix Quote Link to comment
d.p Posted March 30, 2023 Author Report Share Posted March 30, 2023 4 hours ago, banzai510(hainz) said: take photos of the fix For sure when I get it back. Quote Link to comment
banzai510(hainz) Posted March 31, 2023 Report Share Posted March 31, 2023 YOu having the spout put back on and core redone or just the spout. Cause mine braoke exactly the same. I have not thrown it away But Im sure the one in the truck now will be fine HOPEFULLY for a while Quote Link to comment
d.p Posted March 31, 2023 Author Report Share Posted March 31, 2023 3 hours ago, banzai510(hainz) said: YOu having the spout put back on and core redone or just the spout. Cause mine braoke exactly the same. I have not thrown it away But Im sure the one in the truck now will be fine HOPEFULLY for a while Having them fix thet spout, remove the valve and replace the o-ring if they can. Also fix the base of the spout with the valve at the end because when I was trying to break the valve loose it separated at the base where it meets the core. In the end just a huge cluster fuck. It’s same shop that fixed my OEM radiator so hoping they can set me straight. It’s pretty much the only old school radiator shop anywhere close to me. Quote Link to comment
banzai510(hainz) Posted April 1, 2023 Report Share Posted April 1, 2023 14 hours ago, d.p said: only old school radiator shop anywhere close to me. That is the key right there. I was surprised they took that on. 1 Quote Link to comment
mrbigtanker Posted April 2, 2023 Report Share Posted April 2, 2023 Looks good. You must get a lot of thumbs up driving it. Quote Link to comment
d.p Posted April 3, 2023 Author Report Share Posted April 3, 2023 For sure it gets attention. 1 Quote Link to comment
d.p Posted April 4, 2023 Author Report Share Posted April 4, 2023 $145 and I’m whole again. Waiting on a fan that @Crashtd420sent me and then I’ll put it all back together. 7 Quote Link to comment
mainer311 Posted April 4, 2023 Report Share Posted April 4, 2023 Just like sweating copper pipes together. 1 Quote Link to comment
d.p Posted April 5, 2023 Author Report Share Posted April 5, 2023 56 minutes ago, mainer311 said: Just like sweating copper pipes together. Yeah. I thought worst case I could find a plumber to fix it. Quote Link to comment
d.p Posted April 6, 2023 Author Report Share Posted April 6, 2023 Got it all put back together, installed and working but I lost one of the nuts that bolts the box to the firewall. Does anyone know the thread and pitch of those mfers? 3 Quote Link to comment
mrbigtanker Posted April 7, 2023 Report Share Posted April 7, 2023 M6 1.0 possibly Quote Link to comment
mrbigtanker Posted April 7, 2023 Report Share Posted April 7, 2023 Ill look at mine tomorrow Quote Link to comment
thisismatt Posted April 7, 2023 Report Share Posted April 7, 2023 Not likely to be metric 🤔 Quote Link to comment
mainer311 Posted April 7, 2023 Report Share Posted April 7, 2023 Yeah, all body bolts on a 521 are fine thread SAE. The engine is metric. Quote Link to comment
banzai510(hainz) Posted April 7, 2023 Report Share Posted April 7, 2023 thanks for the photos yeah most body bolts are SAE on 521s Quote Link to comment
Crashtd420 Posted April 8, 2023 Report Share Posted April 8, 2023 On 4/5/2023 at 9:52 PM, d.p said: Got it all put back together, installed and working but I lost one of the nuts that bolts the box to the firewall. Does anyone know the thread and pitch of those mfers? Did you figure it out yet? Its a fine pitch 1/4 thread so I believe it would be 1/4-28 .. im trying to find a tap match the pitch to be 100% sure Quote Link to comment
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